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Security of MAC Functions (CSS322, L18, Y14)
 
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Brute Force attacks on Message Authentication Codes; attacking the key versus attack the tag/code. Course material via: http://sandilands.info/sgordon/teaching
Views: 634 Steven Gordon
Cryptography Full Crash Course - A to Z
 
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In this course you will learn about everything you need to understand cryptography. In this course you will expose to following topics: - Number theory - Vigenere cipher - One time pad - CPC MAC - Computational Secrecy - Digital Signature - Public key cryptography - Diffie Helman key exchange - Mode of encryption - RSA public key - Secure communication session - Pseudorandomness and so on.. ****************************************************************** This course is offered by University of Maryland through online popular course platform coursera. This course is part of Cyber security specialization. Course Link: https://www.coursera.org/specializations/cyber-security This video is provided here for research and educational purposes in the field of Cryptography. No copyright intended. If you are the content owner would like to remove this video from YouTube Please contact me through email: [email protected] *********************************************************************************** Connect With Me: Learn about Python, data science, Machine Learning: https://www.sheikhhanif.github.io/ Join data science group: Facebook Group: https://www.facebook.com/groups/1783416061775380/ Github: https://github.com/SheikhHanif ***************************************************************** Some related tags: cryptography course pdf modern cryptography course cryptography course in india cryptography university courses cryptography degree elliptic curve cryptography coursera cryptography examples cryptography tutorial pdf cryptography tutorial ppt modern cryptography tutorial cryptography techniques cryptography tutorial youtube cryptography and network security cryptography course public key cryptography
Views: 1509 Geek's Lesson
Cryptography
 
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Google IT Support Professional Certificate Course 6 - IT Security: Defense against the digital dark arts, Module 2 - Cryptology To get certificate subscribe at: https://www.coursera.org/specializations/google-it-support ================= The whole course playlist: Google IT Support Professional Certificate https://www.youtube.com/playlist?list=PL2jykFOD1AWZlfwMPcVKwaFrRXbqObI3U ================= IT Security https://www.youtube.com/playlist?list=PL2jykFOD1AWaEXEpyRf-Im3U8WQ962Y4B ================= https://www.facebook.com/cyberassociation/ https://scsa.ge/en/online-courses/ This six-course certificate, developed exclusively by Google, includes innovative curriculum designed to prepare you for an entry-level role in IT support. A job in IT can mean in-person or remote help desk work, either in a small business or at a global company, like Google. Whether you’ve been tinkering with IT or are completely new to the field, you’ve come to the right place. If you’re looking for a job, upon completion of the certificate, you can share your information with top employers, like Bank of America, Walmart, Sprint, GE Digital, PNC Bank, Infosys, TEKsystems, UPMC, and, of course, Google. Course 6 - IT Security: Defense against the digital dark arts About the Course This course covers a wide variety of IT security concepts, tools, and best practices. It introduces threats and attacks and the many ways they can show up. We’ll give you some background of encryption algorithms and how they’re used to safeguard data. Then, we’ll dive into the three As of information security: Authentication, authorization, and accounting. We’ll also cover network security solutions, ranging from firewalls to Wifi encryption options. The course is rounded out by putting all these elements together into a multi-layered, in-depth security architecture, followed by recommendations on how to integrate a culture of security into your organization or team. At the end of this course, you’ll understand: - how various encryption algorithms and techniques work and their benefits and limitations. - various authentication systems and types. - the difference between authentication and authorization. At the end of this course, you’ll be able to: - evaluate potential risks and recommend ways to reduce risk. - make recommendations on how best to secure a network. - help others to understand security concepts and protect themselves Who is this class for: This program is intended for beginners who are interested in developing the skills necessary to perform entry-level IT support. No pre-requisite knowledge is required. However, if you do have some familiarity with IT, you can skip through any content that you might already know and speed ahead to the graded assessments. Module 2 - Cryptology In the second module of this course, we'll learn about cryptology. We'll explore different types of encryption practices and how they work. We'll show you the most common algorithms used in cryptography and how they've evolved over time. By the end of this module, you'll understand how symmetric encryption, asymmetric encryption, and hashing work; you'll also know how to choose the most appropriate cryptographic method for a scenario you may see in the workplace. Learning Objectives • Understand the how symmetric encryption, asymmetric encryption, and hashing work. • Describe the most common algorithms of cryptography. • Choose the most appropriate cryptographic method given a scenario.
Views: 204 intrigano
Principles of Network Security and Cryptography
 
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In this video tutorial we study the basic principles of Network security and also see the concept of Cryptography by understanding a basic example. Principles of Network Security to be discussed in this video are as follows: Confidentiality Authentication Integrity Non-repudiation Access Control Availability We will also learn the concept of Cryptography in this tutorial. Here's the definition of Cryptography: Cryptography is the art of achieving security by encoding messages to make them non-readable This video is a continuation of the previous video so make sure you check that video as well so that you get to know some basics of Network security. Download the FREE Network Security App on Google Playstore for Android - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials Simple Snippets on Facebook- https://www.facebook.com/simplesnippets/ Simple Snippets on Instagram- https://www.instagram.com/simplesnipp... Simple Snippets Google Plus Page- https://plus.google.com/+SimpleSnippets Simple Snippets email ID- [email protected] Download my FREE Network Security Android App - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials For Classroom Coaching in Mumbai for Programming & other IT/CS Subjects Checkout UpSkill Infotech - https://upskill.tech/ UpSkill is an Ed-Tech Company / Coaching Centre for Information Technology / Computer Science oriented courses and offer coacing for various Degree courses like BSc.IT, BSc.CS, BCA, MSc.IT, MSc.CS, MCA etc. Contact via email /call / FB /Whatsapp for more info email - [email protected] We also Provide Certification courses like - Android Development Web Development Java Developer Course .NET Developer Course Check us out on Social media platforms like Facebook, Instagram, Google etc Facebook page - https://www.facebook.com/upskillinfotech/ Insta page - https://www.instagram.com/upskill_infotech/ Google Maps - https://goo.gl/maps/vjNtZazLzW82
Views: 23442 Simple Snippets
Part 1 - Information Security - How Cryptography Works Choosing the Right Crypto for the Job
 
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For more information visit http://ow.ly/aDxuq Part 1 - Security Expert and Interface Technical Training Director Mike Danseglio presented at the Security BSides event in Tempe, AZ on February 18th, 2012. Mr. Danseglio's topic was How Cryptography Works (Choosing the Right Crypto for the Right Job).
Views: 686 InterfaceTT
Birthday attack
 
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A birthday attack is a type of cryptographic attack that exploits the mathematics behind the birthday problem in probability theory. This attack can be used to abuse communication between two or more parties. The attack depends on the higher likelihood of collisions found between random attack attempts and a fixed degree of permutations. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 7370 Audiopedia
Lecture 7: Introduction to Galois Fields for the AES by Christof Paar
 
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For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com
What is PUBLIC-KEY CRYPTOGRAPHY? What does PUBLIC-KEY CRYPTOGRAPHY mean?
 
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What is PUBLIC-KEY CRYPTOGRAPHY? What does PUBLIC-KEY CRYPTOGRAPHY mean? PUBLIC-KEY CRYPTOGRAPHY meaning - PUBLIC-KEY CRYPTOGRAPHY definition - PUBLIC-KEY CRYPTOGRAPHY explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. Public-key cryptography, or asymmetric cryptography, is any cryptographic system that uses pairs of keys: public keys that may be disseminated widely paired with private keys which are known only to the owner. There are two functions that can be achieved: using a public key to authenticate that a message originated with a holder of the paired private key; or encrypting a message with a public key to ensure that only the holder of the paired private key can decrypt it. In a public-key encryption system, any person can encrypt a message using the public key of the receiver, but such a message can be decrypted only with the receiver's private key. For this to work it must be computationally easy for a user to generate a public and private key-pair to be used for encryption and decryption. The strength of a public-key cryptography system relies on the degree of difficulty (computational impracticality) for a properly generated private key to be determined from its corresponding public key. Security then depends only on keeping the private key private, and the public key may be published without compromising security. Public-key cryptography systems often rely on cryptographic algorithms based on mathematical problems that currently admit no efficient solution—particularly those inherent in certain integer factorization, discrete logarithm, and elliptic curve relationships. Public key algorithms, unlike symmetric key algorithms, do not require a secure channel for the initial exchange of one (or more) secret keys between the parties. Because of the computational complexity of asymmetric encryption, it is usually used only for small blocks of data, typically the transfer of a symmetric encryption key (e.g. a session key). This symmetric key is then used to encrypt the rest of the potentially long message sequence. The symmetric encryption/decryption is based on simpler algorithms and is much faster. Message authentication involves hashing the message to produce a "digest," and encrypting the digest with the private key to produce a digital signature. Thereafter anyone can verify this signature by (1) computing the hash of the message, (2) decrypting the signature with the signer's public key, and (3) comparing the computed digest with the decrypted digest. Equality between the digests confirms the message is unmodified since it was signed, and that the signer, and no one else, intentionally performed the signature operation — presuming the signer's private key has remained secret. The security of such procedure depends on a hash algorithm of such quality that it is computationally impossible to alter or find a substitute message that produces the same digest - but studies have shown that even with the MD5 and SHA-1 algorithms, producing an altered or substitute message is not impossible. The current hashing standard for encryption is SHA-2. The message itself can also be used in place of the digest. Public-key algorithms are fundamental security ingredients in cryptosystems, applications and protocols. They underpin various Internet standards, such as Transport Layer Security (TLS), S/MIME, PGP, and GPG. Some public key algorithms provide key distribution and secrecy (e.g., Diffie–Hellman key exchange), some provide digital signatures (e.g., Digital Signature Algorithm), and some provide both (e.g., RSA). Public-key cryptography finds application in, among others, the information technology security discipline, information security. Information security (IS) is concerned with all aspects of protecting electronic information assets against security threats. Public-key cryptography is used as a method of assuring the confidentiality, authenticity and non-repudiability of electronic communications and data storage.
Views: 803 The Audiopedia
The Surprising Power of Modern Cryptography
 
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Modern cryptography is surprisingly powerful, yielding capabilities such as secure multi-party computation, computing on encrypted data and hiding secrets in code. Currently, however, some of these advanced abilities are still too inefficient for practical use. This research aims to continue expanding the capabilities of cryptography and its applications and bringing these advanced capabilities closer to practice. In this talk, Stanford PhD. candidate, Mark Zhandry focuses on a particular contribution that addresses both of these objectives: establishing a shared secret key among a group of participants with only a single round of interaction. The first such protocols requires a setup phase, where a central authority determines the parameters for the scheme; unfortunately, this authority can learn the shared group key and must therefore be trusted. He discusses how to remove this setup phase using program obfuscation, though the scheme is very impractical due to the inefficiencies of current obfuscators. He then describes a new technical tool called witness pseudorandom functions and shows how to use this tool in place of obfuscation, resulting in a significantly more efficient protocol. Mark Zhandry is a Ph.D. candidate at Stanford University 02/19/2015 https://www.cs.washington.edu/htbin-post/mvis/mvis?ID=2693 http://uwtv.org
Views: 657 UW Video
Why cryptography and information Security course
 
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www.hiteshChoudhary.com www.newdemy.com Cryptography What is cryptography? Cryptography (or cryptology; from Greek κρυπτός, "hidden, secret"; and γράφειν, graphein, "writing", or -λογία, -logia, "study", respectively) is the practice and study of techniques for secure communication in the presence of third parties (called adversaries).More generally, it is about constructing and analyzing protocols that overcome the influence of adversaries and which are related to various aspects in information security such as data confidentiality, data integrity, authentication, and non-repudiation. Modern cryptography intersects the disciplines of mathematics, computer science, and electrical engineering. Applications of cryptography include ATM cards, computer passwords, and electronic commerce. Yeah, I know that you have read the above lines many times. These are perfectly true jargons. It’s just something like our brain is made of 80% of water, technically true but it doesn’t explain things much. When I tried to study Cryptography, it was tough. When anyone wants to learn HTML, he can find a lots of resources on internet but when things come to Cryptography you need to buy a lots of books and watch a lots of youtube videos which contains an annoying background music. A lots of blog are also helpful but all are fragmented. So, I decided that it is a good time to put Cryptography course. The course will be beginners friendly and will teach you a lot of things about Information Security. This series is not meant for 2 communities of people over the internet. 1. Not bothered about Computer Security 2. True Computer professional [Advanced programmers and crypto masters] The category one does not fit into any computer security course as information security comes at very last in their priority list. Hence, most of the time they are the practice playgrounds for most of the hackers. The category two has moved into the immense knowledge of information security. And they know all the stuff or most of the present stuff about it. So, they will feel bore in this series because they are the inventor of most of the stuff. Rest of the people are going to love this cryptography online video series. The candidates for which I am looking to take this cryptography course are: 1. University Students 2. Hackers a. Fretos : The freshers b. Practos: The practical ones University Students will be interested in this course as most of the Universities have curriculum of Cryptography. The second category is of hackers but I have divided them into 2 major categories. First one is Fretos, these are fresher in information security and are trying to learn stuff. It is a good time for them to start this series because you will understand terms like MITM, RSA, MD5 and DSA. Second category is hackers who have learned most of the things practically. Personally, I am very impressed that you have gained so much of knowledge. You might have knowledge about hacking into various accounts and systems or even knowledge of creating exploits. But ask a simple question to yourself, you are a pro in hacking skills but have no idea about RSA or Block ciphers. You know to break WEP in wireless but no idea of WEP encryption or cryptic flaw in algorithm. I hope that you have got my point. So, let’s get started.
Views: 3509 Hitesh Choudhary
22. Cryptography: Encryption
 
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MIT 6.046J Design and Analysis of Algorithms, Spring 2015 View the complete course: http://ocw.mit.edu/6-046JS15 Instructor: Srinivas Devadas In this lecture, Professor Devadas continues with cryptography, introducing encryption methods. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 16635 MIT OpenCourseWare
Bitcoin - Cryptographic hash function
 
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What cryptographic hash functions are and what properties are desired of them. More free lessons at: http://www.khanacademy.org/video?v=0WiTaBI82Mc Video by Zulfikar Ramzan. Zulfikar Ramzan is a world-leading expert in computer security and cryptography and is currently the Chief Scientist at Sourcefire. He received his Ph.D. in computer science from MIT.
Views: 220812 Khan Academy
Hill Caesar Cipher - Encryption & Decryption | Polygram Cipher Technique
 
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Hill cipher is a polygraphic substitution cipher based on linear algebra Invented by Lester S. Hill in 1929 Hill used matrices and matrix multiplication to mix up the plaintext In a polygraphic substitution cipher, plaintext letters are substituted in larger groups, instead of substituting letters individually. In this video tutorial we study the basic principles of Network security and also see the concept of Cryptography by understanding a basic example. Principles of Network Security to be discussed in this video are as follows: Confidentiality Authentication Integrity Non-repudiation Access Control Availability We will also learn the concept of Cryptography in this tutorial. Here's the definition of Cryptography: Cryptography is the art of achieving security by encoding messages to make them non-readable This video is a continuation of the previous video so make sure you check that video as well so that you get to know some basics of Network security. Download the FREE Network Security App on Google Playstore for Android - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials Simple Snippets Official Website - https://simplesnippets.tech/ Simple Snippets on Facebook- https://www.facebook.com/simplesnippets/ Simple Snippets on Instagram- https://www.instagram.com/simplesnipp... Simple Snippets Google Plus Page- https://plus.google.com/+SimpleSnippets Simple Snippets email ID- [email protected] For Classroom Coaching in Mumbai for Programming & other IT/CS Subjects Checkout UpSkill Infotech - https://upskill.tech/ UpSkill is an Ed-Tech Company / Coaching Centre for Information Technology / Computer Science oriented courses and offer coacing for various Degree courses like BSc.IT, BSc.CS, BCA, MSc.IT, MSc.CS, MCA etc. Contact via email /call / FB /Whatsapp for more info email - [email protected] We also Provide Certification courses like - Android Development Web Development Java Developer Course .NET Developer Course Check us out on Social media platforms like Facebook, Instagram, Google etc Facebook page - https://www.facebook.com/upskillinfotech/ Insta page - https://www.instagram.com/upskill_infotech/ Google Maps - https://goo.gl/maps/vjNtZazLzW82
Views: 1901 Simple Snippets
Rail-Fence cipher Encryption & Decryption | Transposition Cipher Technique
 
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Rail-fence cipher is a transposition cipher technique which means that in this technique, then characters in the plain text are not substituted but they are jumbled up amongst each other in a particular way to get the cipher text. This technique is simple and easy to crack, hence used along with some other cipher technique. In this video tutorial we study the basic principles of Network security and also see the concept of Cryptography by understanding a basic example. Principles of Network Security to be discussed in this video are as follows: Confidentiality Authentication Integrity Non-repudiation Access Control Availability We will also learn the concept of Cryptography in this tutorial. Here's the definition of Cryptography: Cryptography is the art of achieving security by encoding messages to make them non-readable This video is a continuation of the previous video so make sure you check that video as well so that you get to know some basics of Network security. Download the FREE Network Security App on Google Playstore for Android - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials Simple Snippets Official Website - https://simplesnippets.tech/ Simple Snippets on Facebook- https://www.facebook.com/simplesnippets/ Simple Snippets on Instagram- https://www.instagram.com/simplesnipp... Simple Snippets Google Plus Page- https://plus.google.com/+SimpleSnippets Simple Snippets email ID- [email protected] For Classroom Coaching in Mumbai for Programming & other IT/CS Subjects Checkout UpSkill Infotech - https://upskill.tech/ UpSkill is an Ed-Tech Company / Coaching Centre for Information Technology / Computer Science oriented courses and offer coacing for various Degree courses like BSc.IT, BSc.CS, BCA, MSc.IT, MSc.CS, MCA etc. Contact via email /call / FB /Whatsapp for more info email - [email protected] We also Provide Certification courses like - Android Development Web Development Java Developer Course .NET Developer Course Check us out on Social media platforms like Facebook, Instagram, Google etc Facebook page - https://www.facebook.com/upskillinfotech/ Insta page - https://www.instagram.com/upskill_infotech/ Google Maps - https://goo.gl/maps/vjNtZazLzW82
Views: 2698 Simple Snippets
Quantum Security of NMAC and Related Constructions
 
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Paper by Fang Song and Aaram Yun, presented at Crypto 2017. See https://iacr.org/cryptodb/data/paper.php?pubkey=28244
Views: 76 TheIACR
Jintai Ding - ZHFE, a New Multivariate Public Key Encryption Scheme
 
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Jintai Ding of the University of Cincinnati and the Chinese Academy of Sciences presented a talk titled: ZHFE, a new multivariate public key encryption scheme at the 2014 PQCrypto conference in October, 2014. Abstract: In this paper we propose a new multivariate public key encryption scheme named ZHFE. The public key is constructed using as core map two high rank HFE polynomials. The inversion of the public key is performed using a low degree polynomial of Hamming weight three. This low degree polynomial is obtained from the two high rank HFE polynomials, by means of a special reduction method that uses HFE polynomials. We show that ZHFE is relatively efficient and the it is secure against the main attacks that have threatened the security of HFE. We also propose parameters for a practical implementation of ZHFE. PQCrypto 2014 Book: http://www.springer.com/computer/security+and+cryptology/book/978-3-319-11658-7 Workshop: https://pqcrypto2014.uwaterloo.ca/ Find out more about IQC! Website - https://uwaterloo.ca/institute-for-qu... Facebook - https://www.facebook.com/QuantumIQC Twitter - https://twitter.com/QuantumIQC
What is a digital certificate?
 
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One use of trapdoor functions is to encrypt a message so that it can be safely transmitted across an insecure channel. Another use is to allow a sender to sign a message so that the recipient can verify that the sender originated the message and that the message was not altered during transmission. Along with encryption, digital signatures form the basis for secure and trusted communication online. Credits: Talking: Geoffrey Challen (Assistant Professor, Computer Science and Engineering, University at Buffalo). Producing: Greg Bunyea (Undergraduate, Computer Science and Engineering, University at Buffalo). Part of the https://www.internet-class.org online internet course. A blue Systems Research Group (https://blue.cse.buffalo.edu) production.
Views: 9497 internet-class
PlayFair Cipher Encryption & Decryption | Polygraphic Substitution Cipher
 
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PlayFair cipher is a polygram or polygraphic cipher which means it operates on block of characters (2 characters in this case) instead of single characters. Polygram or Polygraphic ciphers work with block of characters rather than single character itself. In this video tutorial we will understand the concept, encryption and decryption process of Playfair Cipher. Playfair Cipher operates on block of 2 characters each during encryption and decryption process. In this video tutorial we study the basic principles of Network security and also see the concept of Cryptography by understanding a basic example. Principles of Network Security to be discussed in this video are as follows: Confidentiality Authentication Integrity Non-repudiation Access Control Availability We will also learn the concept of Cryptography in this tutorial. Here's the definition of Cryptography: Cryptography is the art of achieving security by encoding messages to make them non-readable This video is a continuation of the previous video so make sure you check that video as well so that you get to know some basics of Network security. Download the FREE Network Security App on Google Playstore for Android - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials Simple Snippets Official Website - https://simplesnippets.tech/ Simple Snippets on Facebook- https://www.facebook.com/simplesnippets/ Simple Snippets on Instagram- https://www.instagram.com/simplesnipp... Simple Snippets Google Plus Page- https://plus.google.com/+SimpleSnippets Simple Snippets email ID- [email protected] For Classroom Coaching in Mumbai for Programming & other IT/CS Subjects Checkout UpSkill Infotech - https://upskill.tech/ UpSkill is an Ed-Tech Company / Coaching Centre for Information Technology / Computer Science oriented courses and offer coacing for various Degree courses like BSc.IT, BSc.CS, BCA, MSc.IT, MSc.CS, MCA etc. Contact via email /call / FB /Whatsapp for more info email - [email protected] We also Provide Certification courses like - Android Development Web Development Java Developer Course .NET Developer Course Check us out on Social media platforms like Facebook, Instagram, Google etc Facebook page - https://www.facebook.com/upskillinfotech/ Insta page - https://www.instagram.com/upskill_infotech/ Google Maps - https://goo.gl/maps/vjNtZazLzW82
Views: 6790 Simple Snippets
Caesar Cipher Encryption & Decryption | Substitution Cipher Technique
 
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Caesar Cipher technique is a Substitution cipher technique. In this video tutorial we will understand its working, encryption and decryption process. We will also see an example so that you understand it easily. Caesar cipher is a simple substitution technique in which during encryption we replace each alphabet with another alphabet 3 places down the line and during decryption we replace each alphabet with another alphabet 3 places up the line. If you like this video give it a thumbs up and share it with your friends. Also subscribe to our channel so that you get notified when we upload new video tutorials. In this video tutorial we study the basic principles of Network security and also see the concept of Cryptography by understanding a basic example. Principles of Network Security to be discussed in this video are as follows: Confidentiality Authentication Integrity Non-repudiation Access Control Availability We will also learn the concept of Cryptography in this tutorial. Here's the definition of Cryptography: Cryptography is the art of achieving security by encoding messages to make them non-readable This video is a continuation of the previous video so make sure you check that video as well so that you get to know some basics of Network security. Download the FREE Network Security App on Google Playstore for Android - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials Simple Snippets on Facebook- https://www.facebook.com/simplesnippets/ Simple Snippets on Instagram- https://www.instagram.com/simplesnipp... Simple Snippets Google Plus Page- https://plus.google.com/+SimpleSnippets Simple Snippets email ID- simplesnippe[email protected] For Classroom Coaching in Mumbai for Programming & other IT/CS Subjects Checkout UpSkill Infotech - https://upskill.tech/ UpSkill is an Ed-Tech Company / Coaching Centre for Information Technology / Computer Science oriented courses and offer coacing for various Degree courses like BSc.IT, BSc.CS, BCA, MSc.IT, MSc.CS, MCA etc. Contact via email /call / FB /Whatsapp for more info email - [email protected] We also Provide Certification courses like - Android Development Web Development Java Developer Course .NET Developer Course Check us out on Social media platforms like Facebook, Instagram, Google etc Facebook page - https://www.facebook.com/upskillinfotech/ Insta page - https://www.instagram.com/upskill_infotech/ Google Maps - https://goo.gl/maps/vjNtZazLzW82
Views: 10114 Simple Snippets
Hop-by-Hop Message Authentication and Source Privacy in Wireless Sensor Networks
 
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To get this project in ONLINE or through TRAINING Sessions, Contact:JP INFOTECH, Old No.31, New No.86, 1st Floor, 1st Avenue, Ashok Pillar, Chennai -83. Landmark: Next to Kotak Mahendra Bank. Pondicherry Office: JP INFOTECH, #45, Kamaraj Salai, Thattanchavady, Puducherry -9. Landmark: Next to VVP Nagar Arch. Mobile: (0) 9952649690 , Email: [email protected], web: www.jpinfotech.org Blog: www.jpinfotech.blogspot.com Hop-by-Hop Message Authentication and Source Privacy in Wireless Sensor Networks in NS2 Message authentication is one of the most effective ways to thwart unauthorized and corrupted messages from being forwarded in wireless sensor networks (WSNs). For this reason, many message authentication schemes have been developed, based on either symmetric-key cryptosystems or public-key cryptosystems. Most of them, however, have the limitations of high computational and communication overhead in addition to lack of scalability and resilience to node compromise attacks. To address these issues, a polynomial-based scheme was recently introduced. However, this scheme and its extensions all have the weakness of a built-in threshold determined by the degree of the polynomial: when the number of messages transmitted is larger than this threshold, the adversary can fully recover the polynomial. In this paper, we propose a scalable authentication scheme based on elliptic curve cryptography (ECC). While enabling intermediate nodes authentication, our proposed scheme allows any node to transmit an unlimited number of messages without suffering the threshold problem. In addition, our scheme can also provide message source privacy. Both theoretical analysis and simulation results demonstrate that our proposed scheme is more efficient than the polynomial-based approach in terms of computational and communication overhead under comparable security levels while providing message source privacy.
Views: 783 jpinfotechprojects
CRT
 
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CRT
Subject:Computer Science Paper: Cryptography and network
Views: 82 Vidya-mitra
Privacy, Security, and Cryptography
 
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Launchpad Accelerator Engineer Bootcamp 2018 → http://bit.ly/2G1w5py Ananth Raghunathan is a computer scientist broadly interested in cryptography, security, and machine learning. At Google, he works in the security and privacy research team in Google Brain on differential privacy, applied crypto, and topics at the intersection of security and machine learning. About Launchpad Accelerator: Launchpad Accelerator is an acceleration program for the world’s top startups. Founders work closely with Google and Alphabet product teams and experts to solve specific technical challenges and optimize their businesses for growth with machine learning. Accelerator Startups are selected to be a part of the four month product acceleration program. Each startup is paired with a Google product manager to accelerate their product development, working alongside Google’s ML research and development teams. Learn more at → https://goo.gl/qFTrKD About Accelerator’s Engineering Bootcamp: Accelerator’s Engineering Bootcamp brings together each startup’s project team for a four-day event in San Francisco to learn best practices in experimenting, building, and implementing advanced tech within their startup. The teams are composed of Founders and VPs along with developers, data scientists, and product managers. Watch more in this playlist → http://bit.ly/2G1w5py Subscribe to Launchpad to learn all about startups → http://bit.ly/Launchpad9
Theory and Practice of Cryptography
 
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Google Tech Talks December, 19 2007 Topics include: Introduction to Modern Cryptography, Using Cryptography in Practice and at Google, Proofs of Security and Security Definitions and A Special Topic in Cryptography This talk is one in a series hosted by Google University: Wednesdays, 11/28/07 - 12/19/07 from 1-2pm Speaker: Steve Weis Steve Weis received his PhD from the Cryptography and Information Security group at MIT, where he was advised by Ron Rivest. He is a member of Google's Applied Security (AppSec) team and is the technical lead for Google's internal cryptographic library, KeyMaster.
Views: 70137 GoogleTechTalks
What is AVALANCHE EFFECT? What does AVALANCHE EFFECT mean? AVALANCHE EFFECT meaning & explanation
 
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What is AVALANCHE EFFECT? What does AVALANCHE EFFECT mean? AVALANCHE EFFECT meaning - AVALANCHE EFFECT definition - AVALANCHE EFFECT explanation. SUBSCRIBE to our Google Earth flights channel - http://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ?sub_confirmation=1 Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. In cryptography, the avalanche effect is the desirable property of cryptographic algorithms, typically block ciphers and cryptographic hash functions, wherein if an input is changed slightly (for example, flipping a single bit), the output changes significantly (e.g., half the output bits flip). In the case of high-quality block ciphers, such a small change in either the key or the plaintext should cause a drastic change in the ciphertext. The actual term was first used by Horst Feistel, although the concept dates back to at least Shannon's diffusion. If a block cipher or cryptographic hash function does not exhibit the avalanche effect to a significant degree, then it has poor randomization, and thus a cryptanalyst can make predictions about the input, being given only the output. This may be sufficient to partially or completely break the algorithm. Thus, the avalanche effect is a desirable condition from the point of view of the designer of the cryptographic algorithm or device. Constructing a cipher or hash to exhibit a substantial avalanche effect is one of the primary design objectives, and mathematically the construction takes advantage of butterfly effect. This is why most block ciphers are product ciphers. It is also why hash functions have large data blocks. Both of these features allow small changes to propagate rapidly through iterations of the algorithm, such that every bit of the output should depend on every bit of the input before the algorithm terminates. The strict avalanche criterion (SAC) is a formalization of the avalanche effect. It is satisfied if, whenever a single input bit is complemented, each of the output bits changes with a 50% probability. The SAC builds on the concepts of completeness and avalanche and was introduced by Webster and Tavares in 1985. Higher-order generalizations of SAC involve multiple input bits. Boolean functions which satisfy the highest order SAC are always bent functions, also called maximally nonlinear functions, also called "perfect nonlinear" functions.
Views: 687 The Audiopedia
2. Control Hijacking Attacks
 
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MIT 6.858 Computer Systems Security, Fall 2014 View the complete course: http://ocw.mit.edu/6-858F14 Instructor: James Mickens In this lecture, Professor Mickens continues the topic of buffer overflows, discussing approaches to such control hijacking attacks. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 48460 MIT OpenCourseWare
Modified Caesar Cipher - Encryption & Decryption | Substitution Cipher Technique
 
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Modified Caesar cipher is a simple substitution cryptography technique which is a enhanced version of the simple Caesar Cipher technique. In this video tutorial we will study the concept, encryption and decryption process of modified Caesar Cipher technique with an example. The only difference between modified Caesar cipher and Caesar cipher technique is that in Caesar Cipher technique we replace alphabets 3 places down or up the line in encryption and decryption process respectively whereas in modified Caesar cipher technique we replace each alphabet K places down or Up the line during encryption and decryption respectively. Now this K value ranges from 1-26 so we have 26 different key values thus enhancing the security. If you like this video so give it a thumbs up. If you have any doubts or suggestions let us know in the comments section below. Also don't forget to subscribe to our channel so that you get notified when we upload new video tutorials. Peace! In this video tutorial we study the basic principles of Network security and also see the concept of Cryptography by understanding a basic example. Principles of Network Security to be discussed in this video are as follows: Confidentiality Authentication Integrity Non-repudiation Access Control Availability We will also learn the concept of Cryptography in this tutorial. Here's the definition of Cryptography: Cryptography is the art of achieving security by encoding messages to make them non-readable This video is a continuation of the previous video so make sure you check that video as well so that you get to know some basics of Network security. Download the FREE Network Security App on Google Playstore for Android - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials Simple Snippets Official Website - https://simplesnippets.tech/ Simple Snippets on Facebook- https://www.facebook.com/simplesnippets/ Simple Snippets on Instagram- https://www.instagram.com/simplesnipp... Simple Snippets Google Plus Page- https://plus.google.com/+SimpleSnippets Simple Snippets email ID- [email protected] For Classroom Coaching in Mumbai for Programming & other IT/CS Subjects Checkout UpSkill Infotech - https://upskill.tech/ UpSkill is an Ed-Tech Company / Coaching Centre for Information Technology / Computer Science oriented courses and offer coacing for various Degree courses like BSc.IT, BSc.CS, BCA, MSc.IT, MSc.CS, MCA etc. Contact via email /call / FB /Whatsapp for more info email - [email protected] We also Provide Certification courses like - Android Development Web Development Java Developer Course .NET Developer Course Check us out on Social media platforms like Facebook, Instagram, Google etc Facebook page - https://www.facebook.com/upskillinfotech/ Insta page - https://www.instagram.com/upskill_infotech/ Google Maps - https://goo.gl/maps/vjNtZazLzW82
Views: 5574 Simple Snippets
2 Challenges in Cryptography Research (ft. Serge Vaudenay)
 
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This video presents the Diffie-Hellman protocol, which is used to set up secure communication channels all over the Internet. It features Serge Vaudenay, full professor of the IC School at EPFL. https://people.epfl.ch/serge.vaudenay ————————————————————————————— The Diffie-Hellman Protocol (ft. Serge Vaudenay) | ZettaBytes https://www.youtube.com/watch?v=kOlCU4not0s
Views: 1590 ZettaBytes, EPFL
Tim Taubert: Keeping secrets with JavaScript | JSConf EU 2014
 
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With the web slowly maturing as a platform the demand for cryptography in the browser has risen, especially in a post-Snowden era. Many of us have heard about the upcoming Web Cryptography API but at the time of writing there seem to be no good introductions available. We will take a look at the proposed W3C spec and its current state of implementation, talk about the good parts and the pitfalls to avoid. I will share my vision of a simpler and safer NaCl-inspired API, and hopefully leave you excited about experimenting further with cryptography in the browser. Transcript & slides: http://2014.jsconf.eu/speakers/tim-taubert-keeping-secrets-with-javascript-an-introduction-to-the-webcrypto-api.html License: For reuse of this video under a more permissive license please get in touch with us. The speakers retain the copyright for their performances.
Views: 12566 JSConf
DEF CON 23 - Eijah - Crypto for Hackers
 
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Hacking is hard. It takes passion, dedication, and an unwavering attention to detail. Hacking requires a breadth of knowledge spread across many domains. We need to have experience with different platforms, operating systems, software packages, tools, programming languages, and technology trends. Being overly deficient in any one of these areas can add hours to our hack, or even worse, bring us total failure. And while all of these things are important for a well-rounded hacker, one of the key areas that is often overlooked is cryptography. In an era dominated by security breaches, an understanding of encryption and hashing algorithms provides a tremendous advantage. We can better hone our attack vectors, especially when looking for security holes. A few years ago I released the first Blu-Ray device key, AA856A1BA814AB99FFDEBA6AEFBE1C04, by exploiting a vulnerability in an implementation of the AACS protocol. As hacks go, it was a simple one. But it was the knowledge of crypto that made it all possible. This presentation is an overview of the most common crypto routines helpful to hackers. We'll review the strengths and weaknesses of each algorithm, which ones to embrace, and which ones to avoid. You'll get C++ code examples, high-level wrapper classes, and an open-source library that implements all the algorithms. We'll even talk about creative ways to merge algorithms to further increase entropy and key strength. If you've ever wanted to learn how crypto can give you an advantage as a hacker, then this talk is for you. With this information you'll be able to maximize your hacks and better protect your personal data. Speaker Bio: Eijah is the founder of demonsaw, a secure and anonymous content sharing platform, and a Senior Programmer at a world-renowned game development studio. He has over 15 years of software development and IT Security experience. His career has covered a broad range of Internet and mid-range technologies, core security, and system architecture. Eijah has been a faculty member at multiple colleges, has spoken about security and development at conferences, and holds a master’s degree in Computer Science. Eijah is an active member of the hacking community and is an avid proponent of Internet freedom.
Views: 47944 DEFCONConference
31C3 - Now I sprinkle thee with crypto dust
 
01:01:29
Now I sprinkle thee with crypto dust Internet reengineering session When the Internet was designed, it was thought to be meadows full of daisies. As we now know, it's a dark place, where communication is monitored and subverted. This session presents both developments in known solutions, as well as novel suggestions, to liberally apply crypto to improve the foundations of Internet communications. Trusting servers you can't touch by Ryan Lackey: Servers for Internet applications are usually deployed at a distance from both the end users of the service and the administrators of the system, often controlled by third parties. Even when they're hardware vs. virtualized/cloud, it's rare for admins to have direct physical control of the servers. Yet, most applications require a high degree of trust in the integrity of servers. We describe a variety of technologies and solutions to this problem, and a framework to best protect your applications and your users. dename: decentralized, secure, usable PKI by Andreas Erbsen: A major challenge for private online communication is public key distribution. Trusted authorities have failed to be secure, and the web of trust has failed to build the network effect it gravely requires to be usable. This talk proposes a new PKI system built on a cryptographic consensus protocol. A set of directory servers updates and signs a mapping from public keys to names. Anyone can run their own server, strengthening the security guarantee for all clients that know it. We have an open-source implementation that can be easily integrated with systems that currently rely on manual key verification, including secure messaging, host authentication, and software distribution. New development in OTR by Jurre van Bergen Jurre van Bergen will speak about new developments in the world of `off-the-record` messaging. What is going on? Where are we going? In addition we will address frequently answered questions by developers and users. Secure email communication - LEAP Encryption Access Project & Pixelated Your Right to by Varac This presentation will introduce two new secure communication tools under development that help guarantee the right to digitally whisper – LEAP and Pixelated. Dark Mail by Ladar Levision Since Ladar Levison shuttered Lavabit during the summer of 2013, he has been working to solve the email privacy problems that made it technologically possible for an American court to demand unfettered access to the email messages for all of Lavabit’s worldwide customers. After a year of hard work, the Dark Internet Mail Environment (DIME) is a standards based, collaborative effort to create an elegant technical solution capable of protecting the privacy of everyone’s email. It is focused on making end-to-end email encryption automatic, while providing message confidentiality, author verification, and minimizing the leakage of metadata. DIME capable systems reduce the amount of trust users must place in their service provider. Automating the key exchange process while keeping the system resistant to manipulation by sophisticated threats is an ongoing challenge. This talk offers a compressed discussion of the DIME standards, highlighting key portions and will be followed by a project update, where we hope to showcase a DIME capable client and server implementation. TLS ♥ DNS ♥ Tor by equinox Replacing 100 CA hierarchies with the single DNS hierarchy, and how the bite reflex against the latter is coming at the cost of less secure identities. ────────── ➤Speaker: Ryan Lackey, Andres Erbsen, Jurre van Bergen, Ladar Levison, equinox, Daniel Ziegler ➤EventID: 6597 ➤Event: 31th Chaos Communication Congress [31c3] of the Chaos Computer Club [CCC] ➤Location: Congress Centrum Hamburg (CCH); Am Dammtor; Marseiller Straße; 20355 Hamburg; Germany ➤Language: english ➤Begin: Tue, 12/30/2014 16:00:00 +01:00 ➤License: CC-by
Views: 60 HackersOnBoard
DEF CON 21 - Jason Staggs - How to Hack Your Mini Cooper
 
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How to Hack Your Mini Cooper: Reverse Engineering Controller Area Network (CAN) Messages on Passenger Automobiles JASON STAGGS GRAD STUDENT AND RESEARCH ASSISTANT, UNIVERSITY OF TULSA This presentation introduces the underlying protocols on automobile communication system networks of passenger vehicles and evaluates their security. Although reliable for communication, vehicle protocols lack inherit security measures. This work focuses strongly on controller area networks (CANs) and the lack of authentication and validation of CAN messages. Current data security methods for CAN networks rely on the use of proprietary CAN message IDs along with physical boundaries between the CAN bus and the outside world. As we all know, security through obscurity is not true security. These message IDs can be reverse engineered and spoofed to yield a variety of results. This talk discusses methods for reverse engineering proprietary CAN messages. These reverse engineered messages are then injected onto the CAN bus of a 2003 Mini Cooper with the help of cheap Arduino hardware hacking. Additionally, a proof of concept will be demonstrated on how to build your own rogue CAN node to take over a CAN network and potentially manipulate critical components of a vehicle. The proof of concept demonstrates taking full control of the instrument cluster using the reverse engineering methods presented. Jason Staggs is currently a graduate student in computer science and a security research assistant at the Institute for Information Security (iSec) at The University of Tulsa. He also is involved with The University of Tulsa's Crash Reconstruction Research Consortium (TU-CRRC) where he occasionally gets to hack and wreck a variety of vehicles. Before attending graduate school, Jason worked as a cyber-security analyst for a leading information security firm, True Digital Security in Tulsa, OK. Jason holds a Bachelors degree in Information Assurance and Forensics from Oklahoma State University along with several industry certifications. His research interests include network intrusion detection systems, digital forensics, critical infrastructure protection, and reverse engineering. Materials: https://www.defcon.org/images/defcon-21/dc-21-presentations/Staggs/DEFCON-21-Staggs-How-to-Hack-Your-Mini-Cooper-Updated.pdf https://www.defcon.org/images/defcon-21/dc-21-presentations/Staggs/DEFCON-21-Staggs-How-to-Hack-Your-Mini-Cooper-WP.pdf https://www.defcon.org/images/defcon-21/dc-21-presentations/Staggs/Extras.zip
Views: 5480 DEFCONConference
Hop-by-Hop Message Authentication and Source Privacy in Wireless Sensor Networks
 
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To get this project in ONLINE or through TRAINING Sessions, Contact:JP INFOTECH, Old No.31, New No.86, 1st Floor, 1st Avenue, Ashok Pillar, Chennai -83. Landmark: Next to Kotak Mahendra Bank. Pondicherry Office: JP INFOTECH, #45, Kamaraj Salai, Thattanchavady, Puducherry -9. Landmark: Next to VVP Nagar Arch. Mobile: (0) 9952649690 , Email: [email protected], web: www.jpinfotech.org Blog: www.jpinfotech.blogspot.com Hop-by-Hop Message Authentication and Source Privacy in Wireless Sensor Networks Message authentication is one of the most effective ways to thwart unauthorized and corrupted messages from being forwarded in wireless sensor networks (WSNs). For this reason, many message authentication schemes have been developed, based on either symmetric-key cryptosystems or public-key cryptosystems. Most of them, however, have the limitations of high computational and communication overhead in addition to lack of scalability and resilience to node compromise attacks. To address these issues, a polynomial-based scheme was recently introduced. However, this scheme and its extensions all have the weakness of a built-in threshold determined by the degree of the polynomial: when the number of messages transmitted is larger than this threshold, the adversary can fully recover the polynomial. In this paper, we propose a scalable authentication scheme based on elliptic curve cryptography (ECC). While enabling intermediate nodes authentication, our proposed scheme allows any node to transmit an unlimited number of messages without suffering the threshold problem. In addition, our scheme can also provide message source privacy. Both theoretical analysis and simulation results demonstrate that our proposed scheme is more efficient than the polynomial-based approach in terms of computational and communication overhead under comparable security levels while providing message source privacy.
Views: 200 jpinfotechprojects
Classical Cryptosystems
 
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Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
Views: 14458 nptelhrd
What is IMPOSSIBLE DIFFERENTIAL CRYPTANALYSIS? What does IMPOSSIBLE DIFFERENTIAL CRYPTANALYSIS mean?
 
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What is IMPOSSIBLE DIFFERENTIAL CRYPTANALYSIS? What does IMPOSSIBLE DIFFERENTIAL CRYPTANALYSIS mean? IMPOSSIBLE DIFFERENTIAL CRYPTANALYSIS meaning - IMPOSSIBLE DIFFERENTIAL CRYPTANALYSIS definition - IMPOSSIBLE DIFFERENTIAL CRYPTANALYSIS explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ In cryptography, impossible differential cryptanalysis is a form of differential cryptanalysis for block ciphers. While ordinary differential cryptanalysis tracks differences that propagate through the cipher with greater than expected probability, impossible differential cryptanalysis exploits differences that are impossible (having probability 0) at some intermediate state of the cipher algorithm. Lars Knudsen appears to be the first to use a form of this attack, in the 1998 paper where he introduced his AES candidate, DEAL. The first presentation to attract the attention of the cryptographic community was later the same year at the rump session of CRYPTO '98, in which Eli Biham, Alex Biryukov, and Adi Shamir introduced the name "impossible differential" and used the technique to break 4.5 out of 8.5 rounds of IDEA and 31 out of 32 rounds of the NSA-designed cipher Skipjack. This development led cryptographer Bruce Schneier to speculate that the NSA had no previous knowledge of impossible differential cryptanalysis. The technique has since been applied to many other ciphers: Khufu and Khafre, E2, variants of Serpent, MARS, Twofish, Rijndael, CRYPTON, Zodiac, Hierocrypt-3, TEA, XTEA, Mini-AES, ARIA, Camellia, and SHACAL-2. Biham, Biryukov and Shamir also presented a relatively efficient specialized method for finding impossible differentials that they called a miss-in-the-middle attack. This consists of finding "two events with probability one, whose conditions cannot be met together."
Views: 253 The Audiopedia
Stream Ciphers (Contd...1)
 
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Cryptography and Network Security by Prof. D. Mukhopadhyay, Department of Computer Science and Engineering, IIT Kharagpur. For more details on NPTEL visit http://nptel.iitm.ac.in
Views: 5346 nptelhrd
Hop-by-Hop Message Authentication and Source Privacy in Wireless Sensor Networks (JAVA)
 
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Message authentication is one of the most effective ways to thwart unauthorized and corrupted messages from being forwarded in wireless sensor networks (WSNs). For this reason, many message authentication schemes have been developed, based on either symmetric-key cryptosystems or public-key cryptosystems. Most of them, however, have the limitations of high computational and communication overhead in addition to lack of scalability and resilience to node compromise attacks. To address these issues, a polynomial-based scheme was recently introduced. However, this scheme and its extensions all have the weakness of a built-in threshold determined by the degree of the polynomial: when the number of messages transmitted is larger than this threshold, the adversary can fully recover the polynomial. In this paper, we propose a scalable authentication scheme based on elliptic curve cryptography (ECC). While enabling intermediate nodes authentication, our proposed scheme allows any node to transmit an unlimited number of messages without suffering the threshold problem. In addition, our scheme can also provide message source privacy. Both theoretical analysis and simulation results demonstrate that our proposed scheme is more efficient than the polynomial-based approach in terms of computational and communication overhead under comparable security levels while providing message source privacy.
Hop-by-Hop Message Authentication and Source Privacy in Wireless Sensor Networks
 
09:10
Message authentication is one of the most effective ways to thwart unauthorized and corrupted messages from being forwarded in wireless sensor networks (WSNs). For this reason, many message authentication schemes have been developed, based on either symmetric-key cryptosystems or public-key cryptosystems. Most of them, however, have the limitations of high computational and communication overhead in addition to lack of scalability and resilience to node compromise attacks. To address these issues, a polynomial-based scheme was recently introduced. However, this scheme and its extensions all have the weakness of a built-in threshold determined by the degree of the polynomial: when the number of messages transmitted is larger than this threshold, the adversary can fully recover the polynomial. In this paper, we propose a scalable authentication scheme based on elliptic curve cryptography (ECC). While enabling intermediate nodes authentication, our proposed scheme allows any node to transmit an unlimited number of messages without suffering the threshold problem. In addition, our scheme can also provide message source privacy. Both theoretical analysis and simulation results demonstrate that our proposed scheme is more efficient than the polynomial-based approach in terms of computational and communication overhead under comparable security levels while providing message source privacy.
Coding for Cryptographic Security Enhancement Using Stopping Sets
 
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Coding for Cryptographic Security Enhancement Using Stopping Sets TO GET THIS PROJECT IN ONLINE OR THROUGH TRAINING SESSIONS CONTACT: Chennai Office: JP INFOTECH, Old No.31, New No.86, 1st Floor, 1st Avenue, Ashok Pillar, Chennai – 83. Landmark: Next to Kotak Mahendra Bank / Bharath Scans. Landline: (044) - 43012642 / Mobile: (0)9952649690 Pondicherry Office: JP INFOTECH, #45, Kamaraj Salai, Thattanchavady, Puducherry – 9. Landmark: Opp. To Thattanchavady Industrial Estate & Next to VVP Nagar Arch. Landline: (0413) - 4300535 / Mobile: (0)8608600246 / (0)9952649690 Email: [email protected], Website: http://www.jpinfotech.org, Blog: http://www.jpinfotech.blogspot.com In this paper we discuss the ability of channel codes to enhance cryptographic secrecy. Toward that end, we present the secrecy metric of degrees of freedom in an attacker's knowledge of the cryptogram, which is similar to equivocation. Using this notion of secrecy, we show how a specific practical channel coding system can be used to hide information about the cipher text, thus increasing the difficulty of cryptographic attacks. The system setup is the wiretap channel model where transmitted data traverse through independent packet erasure channels with public feedback for authenticated (Automatic Repeat request). The code design relies on puncturing nonsystematic low-density parity-check codes with the intent of inflicting an eavesdropper with stopping sets in the decoder. Furthermore, the design amplifies errors when stopping sets occur such that a receiver must guess all the channel-erased bits correctly to avoid an expected error rate of one half in the cipher text. We extend previous results on the coding scheme by giving design criteria that reduces the effectiveness of a maximum-likelihood attack to that of a message-passing attack. We further extend security analysis to models with multiple receivers and collaborative attackers. Cryptographic security is enhanced in all these cases by exploiting properties of the physical-layer. The enhancement is accurately presented as a function of the degrees of freedom in the eavesdropper's knowledge of the cipher text, and is even shown to be present when eavesdroppers have better channel quality than legitimate receivers.
Views: 152 JPINFOTECH PROJECTS
Information Technology & Software Engineering Mock Interview 8 of 28
 
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Realistic Information Technology & Software Engineering Interviews: 8 of 28 - Information & Cyber Security, Embedded Systems, and Energy Conservation. For infinite number of professional interviews (Exactly as you experience in professional companies - Technical + HR), visit https://InterviewMax.com. This interview series covers graduate syllabus and the syllabus of Masters degree to a great extent. For example, the key topics like, Cyber Attacks, Security Goals like Authentication Authorization, Cipher Techniques like Substitution and Transposition, One Time Pad, Modular Arithmetic, GCD, Euclid’s Algorithms, Chinese Remainder Theorem, Discrete Logarithm, Fermat Theorem, Block Ciphers, Stream Ciphers. Secret Splitting and Sharing, Symmetric Key Algorithms like DES AES BLOWFISH, Attacks on DES, Modes of Operations, Linear Cryptanalysis and Differential Cryptanalysis, Public Key Algorithms like RSA, Key Generation and Usage, message digest, key management, Hash Algorithms like SHA-1, MD5, Key Management, key Generations, key Distribution, key Updation, Digital Certificate, Digital Signature, PKI, Diffie-Hellman Key Exchange, One Way Authentication, Mutual Authentication, Kerberos 5.0, Layer Wise Security Concerns, IPSEC, AH and ESP, Tunnel Mode, Transport Mode, Security Associations, SSL, Handshake Protocol, Record Layer Protocol. IKE, Internet Key Exchange Protocol. Intrusion Detection Systems, Anomaly Based, Signature Based, Host Based, Network Based Intrusion Detection Systems, Cybercrime and Information security, Classification of Cybercrimes, The legal perspectives, Americal perceptive, European perspective, Indian perspective, Global perspective, Categories of Cybercrime, Types of Attacks, Social Engineering, Cyberstalking, Cloud Computing and Cybercrime, Tools and methods used in cybercrime, Proxy servers and Anonymizers, Phishing, Password Cracking, Key-loggers and Spywares, Types of Virus, Worms, Dos and DDoS,SQL injection, Cybercrime and Legal perspectives, Cyber laws, The Indian IT Act, Challenges, Amendments, Challenges to the Law, cybercrime Scenario in India, Indian IT Act, Digital Signatures, information security, algorithms for implementing security, Internet Key Exchange Protocol, Applied Cryptography, Cyber Security, Cyber Crimes, Computer Forensics, Network Security, Cryptography, network security, Intrusion Detection Systems, Tools and methods used in cyber crime. For details visit the website http://InterviewMax.com
Views: 16 InterviewMax
IOTA tutorial 34: Time-Based One-Time Password (TOTP)
 
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If you like this video and want to support me, go this page for my donation crypto addresses: https://www.youtube.com/c/mobilefish/about This is part 34 of the IOTA tutorial. In this video series different topics will be explained which will help you to understand IOTA. It is recommended to watch each video sequentially as I may refer to certain IOTA topics explained earlier. In this tutorial I will explain in detail how the Time-based One-time Password algorithm works. This tutorial is not specific IOTA related. It is intended for developers who wants to understand how the Time-based One-time Password algorithm works. The Time-based One-time Password algorithm generates single use passwords, also known as tokens, which are only valid for a certain time period. Often this time period is 60 seconds. These generated tokens are based on a shared secret key. The Time-Based One-Time Password algorithm was published as RFC 6238 by the Internet Engineering Task Force (IETF). See: https://tools.ietf.org/html/rfc6238 In RFC 6238 a Java reference Time-based One-time Password algorithm can be found. See also: https://www.mobilefish.com/download/java/TOTP.java The Time-based One-time Password algorithm is an extension of the HMAC-Based One-Time Password (HOTP) algorithm, which was published as RFC 4226 by the IETF. The HMAC-Based One-Time Password defines an algorithm to create an one time password from a shared secret key and a counter. See: https://tools.ietf.org/html/rfc4226 When 2FA is enabled on the Trinity wallet, it first generates a shared secret key. You must write down this shared secret key and safely store it. Usually this shared secret key with additional information is embedded in a QR code which you can scan by a 2FA app such as the Google Authenticator. After the QR code is scanned the Google Authenticator generates a token which is a unique code, based on the shared secret key and the current time. Lets assume you are currently in Beijing (China). The local Beijing date and time is 4 December 2018, 20:24:20 (UTC+8). The date and time at that moment at 0 degree longitude meridian is 4 December 2018, 12:24:20. UTC stands for Coordinated Universal Time and is the time at the 0 degree longitude meridian (Prime Meridian). Convert this date and time (4 December 2018, 12:24:20) to Unix Epoch Time. Instead of Unix Epoch Time we can also say Unix Time (Tunix). Unix Epoch Time is the number of seconds that have elapsed since, 1 January 1970 00:00:00 UTC, not counting leap seconds. If the date and time at 0 degree longitude meridian is 4 December 2018, 12:24:20 than Tunix = 1543926260 sec Equation: N = floor(Tunix / ts) N = number of time steps which have been elapsed since Unix Epoch Time. floor = function which rounds a number downward to its nearest integer. Tunix = number of seconds that have elapsed since, 1 January 1970 00:00:00 UTC, not counting leap seconds. ts = time step. By default the time step is 30 sec. Convert the number of time steps (N) into a hexadecimal value. The hexadecimal value must have 16 hexadecimal characters (=8 bytes). If not, prepend with 0's. Convert the hexadecimal value into a 8 bytes array and assign this value to variable m (=message). Convert the shared secret key into a 20 bytes array and assign this value to variable K. The shared secret key is a randomly generated 20 bytes number which is base-32 encoded. For readability this key is divided in groups of 4 characters and all in lower case. More information about base-32, see Blockchain tutorial 31: https://youtu.be/Va8FLD-iuTg Calculate the HMAC hash using the HMAC-SHA1 algorithm. More information about HMAC, see Blockchain tutorial 30: https://youtu.be/emBgrRIyyWQ This HMAC hash size is 160 bits (=20 bytes). Get the last 4 bits of this hash value and get its integer value. In this example, the last 4 bits is 0xA which represents integer 10. This integer is called the offset. Starting from the offset, get the first 4 bytes from the HMAC hash. Apply a binary operation for each byte. Convert this binary value to an integer Calculate the Token = integer value % 10^n where n is the token size. If the token size is less than n, prefix with 0's. Every 30 seconds a new token is generated. But a token remains valid for 60 seconds. An online Time-based One-time Password generator can be found at: https://www.mobilefish.com/services/cryptocurrency/totp.html WARNING: DO NOT USE THIS TOOL TO GENERATE YOUR TOKENS. IT IS ONLY INTENDED FOR EDUCATIONAL, TEST OR DEMONSTRATION PURPOSES. Check out all my other IOTA tutorial videos: https://www.youtube.com/playlist?list=PLmL13yqb6OxdIf6CQMHf7hUcDZBbxHyza Subscribe to my YouTube channel: https://www.youtube.com/channel/UCG5_CT_KjexxjbgNE4lVGkg?sub_confirmation=1 The presentation used in this video tutorial can be found at: https://www.mobilefish.com/developer/iota/iota_quickguide_tutorial.html #mobilefish #howto #iota
Views: 335 Mobilefish.com
✅Cryptocurrency Market Update - Bitcoin Cash Hash Wars Heat Up
 
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Crypto Market Update November 2018 ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● 🙏Thank you so much for spending your time to watch this video and please don't forget to LIKE & SUBSCRIBE. See you in the next video.✌ I Hope you enjoyed the video. If so, please share it with your friends and family. 😎Stay up to date with today's revolutionary Blockchain Technology by subscribing to my channel and always get the most recent updates by ringing the bell. On this channel, you will watch Bitcoin & other Cryptocurrency News, Technical Analysis, Trading Tips, Trading Signals, and Price Predictions. ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● 🙏I will appreciate any donations to my channel. Every little bit helps. Thank You! 🙂 ✔️₿ITCOIN 1CKFuEeqzQR8Bv9cvVjtxFbnZkPueiRJwr ✔️ LITECOIN LcmJTKEz4LmZ7j7UaKCFB6zdmH2vKzWWyS ✔️ ETHEREUM 0x4cbe86df99bcd89b2016c3892e52c8fb9d4dc6c8 ✔️XRP rKfzfrk1RsUxWmHimWyNwk8AoWHoFneu4m/ Destination Tag: 963444220 ✔️DASH XukafF46YdoRvgYDHWJQHtFakZvcZtTQjD ✔️PayPal: paypal.me/BitcoinCryptoShow ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● 🚩 DISCLAIMER: This video and description may contain affiliate links, which means that if you click on one of the product links, I’ll receive a small commission. This helps support the channel and allows us to continue to make videos like this. Thank you for the support! £(AMAZON LINKS TO THE *BEST* DEALS)£ 💙 Yubico security key https://amzn.to/2QNLfjB 💙 Yubico YubiKey 4 - USB-A, Two Factor Authentication Security Key, black https://amzn.to/2QLdbob 💙 The End of Money: The story of bitcoin, cryptocurrencies and the blockchain revolution (New Scientist Instant Expert) https://amzn.to/2NsZTia 💙 Just HOLD It Cryptocurrency T-Shirt Bitcoin Ethereum Litcoin Ripple BTC (Black, XL) https://amzn.to/2QLl1hv 💙 Indy Visuals Litecoin Cryptocurrency Premium T-Shirt ETH Money XRP Bitcoin Ripple Iota S-5XL - Sports - XL https://amzn.to/2OEcPy1 💙 In Crypto We Trust Bitcoin Cryptocurrency T-shirt https://amzn.to/2xG0gLE 💙 Ethereum ETH Cryptocurrency Tee Shirt https://amzn.to/2xqvYNg ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● RECOMMENDED CRYPTO EXCHANGES: If you're looking to start buying Bitcoin, Coinbase is the preferred and safest option available to the US and Europe. ▶Please join Coinbase using this link for free $10: https://www.coinbase.com/join/5a3a545548cb6402f3cf7c39 Coinmama is one of the best exchange to buy Bitcoin and Ethereum with credit card in the fastest, easiest and safest way online! Buying BTC and ETH in 3 simple steps at Coinmama. ▶COINMAMA: http://go.coinmama.com/visit/?bta=53190&nci=5343 To start buying alt coins, Binance IS THE BEST altcoin exchange out there. Please join Binance using this link: ▶https://www.binance.com/?ref=13180000 ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● COLD STORAGE WALLETS TO SECURE YOUR CRYPTOS. 🔒 Trezor: https://shop.trezor.io?a=toksfmgl 🔒 Ledger Nano: https://www.ledger.com?r=2964dc525816 🔒 Ellipal: http://order.ellipal.com/?ref=bitcoincryptoshow 🔒 CoolWallet: https://coolwallet.io/product/coolwallet/?ref=migueladon ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● 🌎 Follow me on Twiter: https://twitter.com/BitcoinCryptoSh ●▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬● 📌DISCLAIMER: This is not Financial Advice, and We are not Financial Advisers, And These are merely the opinions of YouTubers. SOURCE: Nugget's News
Views: 55 BitcoinCryptoShow
Yasufumi Hashimoto - Cryptanalysis of the Multivariate Signature Scheme Proposed in  PQCryptop 2013
 
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Yasufumi Hashimoto of the University of Ryukyus presented a talk titled: Cryptanalysis of the multivariate signature scheme proposed in PQCrypto 2013 at the 2014 PQCrypto conference in October, 2014. Abstract: In PQCrypto 2013, Yasuda, Takagi and Sakurai proposed a new signature scheme as one of multivariate public key cryptosystems (MPKCs). This scheme (called YTS) is based on the fact that there are two isometry classes of non-degenerate quadratic forms on a vector space with a prescribed dimension. The advantage of YTS is its efficiency . In fact, its signature generation is eight or nine times faster than Rainbow of similar size. For the security, it is known that the direct attack, the IP attack and the min-rank attack are applicable on YTS, and the running times are exponential time for the first and the second attacks and subexponential time for the third attack. In the present paper, we give a new attack on YTS using an approach similar to the diagonalization of a matrix. Our attack works in polynomial time and it actually recovers equivalent secret keys of YTS having 140-bits security against min-rank attack in several minutes. PQCrypto 2014 Book: http://www.springer.com/computer/security+and+cryptology/book/978-3-319-11658-7 Workshop: https://pqcrypto2014.uwaterloo.ca/ Find out more about IQC! Website - https://uwaterloo.ca/institute-for-qu... Facebook - https://www.facebook.com/QuantumIQC Twitter - https://twitter.com/QuantumIQC
Open Apostille - NEM notarization tool EXPLAINED
 
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Thank you for watching, if you have questions, proposals, feel free to contact me: @tongokongo on telegram and NEM forum or in the comment section. Opinion produced in this video is just my own opinion. I am not a financial advisor, just a guy speaking about the news and technology behind the NEM blockchain. OpenApostille is a notarization tool built to enhance the possibilities of the apostille service on the NEM platform. I am showing how to create your own apostille, how to upload it into this service and I am explaining why it is needed in the NEM ecosystem. Links: Open Apostille: https://www.openapostille.net/ ************************************************************************************************************* Check out my channel about bitcoin and lightning network! https://www.youtube.com/channel/UCRsCSdZt8nVaF_RUuIKOQjA?&ab_channel=ExploreCrypto Social: Steemit: https://steemit.com/@tongokongo Twitter: https://twitter.com/cryptoTonyNEM If you find it useful, please shoot me some NEM! NAWNNR-2SEDKU-YOBSKU-Q3VLZE-7WQW3D-YJ6UTE-SXOJ #nem #notarization #openapostille
Views: 355 Explore Crypto
Rsa Blind Signatures Solution - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 1628 Udacity
Crime: The Real Internet Security Problem
 
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Google TechTalks January 24, 2006 Phillip Hallam-Baker Dr Hallam-Baker is a leading designer or Internet security protocols and has made substantial contributions to the HTTP Digest Authentication mechanism, XKMS, SAML and WS-Security. He is currently working on the DKIM email signing protocol, federated identity systems and completing his first book, The dotCrime Manifesto which sets out a comprehensive strategy for defeating Internet crime. Dr Hallam-Baker has a degree in Electronic Engineering from Southampton University and a doctorate in Computer Science from the Nuclear Physics Laboratory at Oxford University. ABSTRACT Internet Crime is a serious and growing problem. Phishing,...
Views: 12175 Google
Jonathan K. Millen, Constraint Solving for Protocol Analysis (August 5, 2004)
 
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From the CISR video library (http://www.cisr.us) Jonathan K. Millen, SRI International Constraint Solving for Protocol Analysis August 5, 2004 at the Naval Postgraduate School (http://www.nps.edu) ABSTRACT The constraint solver is a fast, easily-used Prolog program for formal cryptographic protocol analysis. Authentication and key distribution protocols are specified in a strand space style. Constraint solving always terminates when the number of legitimate parties is bounded, even when other parameters such as attacker activity and constructed message depth are not. Confidentiality and authentication goals can be tested. The constraint solver enumerates possible legitimate event orderings and for each one generates a set of term closure constraints, for which solution existence is decidable and a solution yields an attack. About Jon Millen Jonathan K. Millen is a Senior Computer Scientist at SRI International. His areas of interest are information security, authentication protocol analysis using formal methods, public key infrastructure, and survivability modeling. Before 1997 he worked at the MITRE Corporation, and supported the National Computer Security Center's Trusted Product Evaluation Program. His doctorate in Mathematics is from Rensselaer Polytechnic Institute in 1969. Dr. Millen is Co-Editor-in-Chief of the Journal of Computer Security, a member of the editorial board of the ACM Transactions on Information and System Security, and he is the founder and steering committee chair of the IEEE Computer Security Foundations Workshop. He is Vice Chair of the IEEE Computer Society Technical Committee on Security and Privacy.
Views: 185 securitylectures
How to Enable Two Factor Authentication in Instagram
 
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To make your Instagram account safe you can use the two-factor authentication method. To enable the two-factor authentication in Instagram tap on your profile, then tap on the settings bar, scroll down and select the two-factor authentication bar. You can do two-factor authentication in two ways. You can install an app or you can select message option to receive security code while login via a new device. Follow US : ---https://www.facebook.com/wevatv/ ---https://www.instagram.com/weva_tv/ ---https://www.linkedin.com/company/weva-tv SUBSCRIBE : https://www.youtube.com/wevatv?sub_confirmation=1 PLAYLISTS: Technical Updates : https://www.youtube.com/watch?v=3oCoQPSP3p0&list=PLw7xdKmY5pvE40qoHeBTtWWM_rVlwJIX3 Top 10 of Everything:https://www.youtube.com/watch?v=eprWVKQtif8&list=PLw7xdKmY5pvGdziP5jMUvcmT4zeE-eOfH How It's made : https://www.youtube.com/watch?v=eoLJo10g9Ww&list=PLw7xdKmY5pvFVFe1SPfbj5_Oz-oUugX8w Camera Techniques and Reviews : https://www.youtube.com/watch?v=oa-jdtwff8I&list=PLw7xdKmY5pvFpqkRr6GSVk1zyE8LwE0uz UNBOXING : https://www.youtube.com/watch?v=XuAwKxT5oMY&list=PLw7xdKmY5pvEDAvcXrqABrrCiJeru5sy5 Youtube Tips : https://www.youtube.com/watch?v=Ny_Iw3RBygo&list=PLw7xdKmY5pvGC_Oycz-MqWNtXBHIlufQF Kerala tourism: https://www.youtube.com/watch?v=CQqhbwZiQ78&list=PLw7xdKmY5pvHttOfmEni4Od-RoDeM-8kb Spectacular Plants and Trees of Kerala : https://www.youtube.com/watch?v=TMeY5p91rlg&list=PLw7xdKmY5pvFkOxOpB7CkBc147nMiOQUJ Arts Cultur of India :https://www.youtube.com/watch?v=F6OaDa4JAUs&list=PLw7xdKmY5pvEkIpHDcW1VLU2aCclS56Ul Explore Kochi: https://www.youtube.com/watch?v=FI2Xsxfecwo&list=PLw7xdKmY5pvEa1UvlTDcYg7FNefpkRkbo Auto Portal :https://www.youtube.com/watch?v=Uw8NEfbvOeQ&list=PLw7xdKmY5pvEoqXH5TElLfq_NfPJDnM3R Facebook Tips:https://www.youtube.com/watch?v=lc_etVcuTas&list=PLw7xdKmY5pvGLamnxXOBZ4ZPfFiY0zh8g Latest Bridal Fashion and Trends: https://www.youtube.com/watch?v=9UDnsQJo8Sc&list=PLw7xdKmY5pvFpdzt1_GKVJ_-TO2ChSi2D Sabyasachi Lehenga Collection: https://www.youtube.com/watch?v=GQiRo2dEcak&list=PLw7xdKmY5pvE23fRZlgNioXoWkaiqDL_8 Kerala Cooking : https://www.youtube.com/watch?v=75q9H_va6qo&list=PLw7xdKmY5pvHpgihIPcGHCDLZQIJaPisd Trivandrum City:https://www.youtube.com/watch?v=kwTv7gg8_W0&list=PLw7xdKmY5pvHXRv0Jd3Y-mO-RJoD1qw0V Indian Yoga Poses:https://www.youtube.com/watch?v=h_R4dOmNi74&list=PLw7xdKmY5pvH8iKvrD9P_jcV8agKWwiLm
Views: 38 WEVA TV
Hop-by-Hop Message Authenticationand Source Privacy in WirelessSensor Networks| IEEE | IEEE projects
 
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Message authentication is one of the most effective ways to thwart unauthorized and corrupted messages from being forwarded in wireless sensor networks (WSNs). For this reason, many message authentication schemes have been developed, based on either symmetric-key cryptosystems or public-key cryptosystems. Most of them, however, have the limitations of high computational and communication overhead in addition to lack of scalability and resilience to node compromise attacks. To address these issues, a polynomial-based scheme was recently introduced. However, this scheme and its extensions all have the weakness of a built-in threshold determined by the degree of the polynomial: when the number of messages transmitted is larger than this threshold, the adversary can fully recover the polynomial. In this paper, we propose a scalable authentication scheme based on elliptic curve cryptography (ECC). While enabling intermediate nodes authentication, our proposed scheme allows any node to transmit an unlimited number of messages without suffering the threshold problem. In addition, our scheme can also provide message source privacy. Both theoretical analysis and simulation results demonstrate that our proposed scheme is more efficient than the polynomial-based approach in terms of computational and communication overhead under comparable security levels while providing message source privacy.

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