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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

11:10:42
Views: 1509 Geek's Lesson

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Views: 204 intrigano

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Views: 23442 Simple Snippets

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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

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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

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For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com

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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

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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

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Views: 3509 Hitesh Choudhary

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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

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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.

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Views: 1901 Simple Snippets

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Views: 2698 Simple Snippets

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Views: 1338 Internetwork Security

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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

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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

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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

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Views: 6790 Simple Snippets

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Views: 10114 Simple Snippets

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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

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Subject:Computer Science Paper: Cryptography and network
Views: 82 Vidya-mitra

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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.

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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

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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

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Views: 5574 Simple Snippets

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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

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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

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Views: 47944 DEFCONConference

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Views: 526 Rezky Wulandari

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Views: 60 HackersOnBoard

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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

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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

57:39
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

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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

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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

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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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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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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

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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

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Views: 335 Mobilefish.com

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Views: 55 BitcoinCryptoShow

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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

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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

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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

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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,...

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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.
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