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SHA-1 (Secure hash Algorithm) working in English  | CSS series
 
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Take the full crash course of Cryptography and Security System for free at Last moment tuitions Full course : https://lastmomenttuitions.com/course/cryptography-and-system-security/ Sample Notes :https://goo.gl/QpZPF5 For full hand made notes of Artificial Intelligence its only 100 rs payment options is PAYTM :9762903078 once we get payment notification we will mail you the notes on your email id contact us at :[email protected] whatsapp :9762903078 apko koi bhi doubt ho toh app humko direct email ya phone kar sakte ho Cryptography and security systems Series introduction to CSS: https://goo.gl/tjrh1L security goals and mechanism:https://goo.gl/uq35hP symmetric cipher:https://goo.gl/KFxF9j Substitution cipher and its types:https://goo.gl/MKmPzk Transposition cipher:https://goo.gl/uHqD7i diffie -hellman: https://goo.gl/YrskC5 RSA Algorithm:https://goo.gl/KwzCBF Kerberos:https://goo.gl/MQPgzw IDEA algorithm : https://goo.gl/PTCqFH Dos and DDos attack: https://goo.gl/8T345G SQL injection:https://goo.gl/bcVHnw SHA-1 vs MD5 :https://goo.gl/QJBhJD chalo toh public bus pass hojao aur share karo videos ko whatsapp group apne last moment pe unn dosto ko jo apni tarah last moment pe padhte hai Aur videos CSS ke aane waale hai so Channel ko subscribe jaroor karna follow us on: https://www.instagram.com/last_moment_tuitions https://www.facebook.com/lastmomenttuition https://www.facebook.com/sumerr3
Views: 71687 Last moment tuitions
How Does SHA-1 Work - Intro to Cryptographic Hash Functions and SHA-1
 
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Learn more advanced front-end and full-stack development at: https://www.fullstackacademy.com SHA-1 stands for Secure Hash Algorithm 1, a cryptographic hash function developed by the NSA that can be used to verify that a file has been unaltered. In this video, we go over the basic features and common implementations of cryptographic hash functions before diving into the inner workings of a Javascript implementation of the SHA-1 function. Although out of use now, walking through the hash function code provides valuable insight into how these algorithms work. Watch this video to learn: - What are Cryptographic Hash Functions - Practical uses for Cryptographic Hash Functions - How does SHA-1 work
Views: 12073 Fullstack Academy
Digital Signatures
 
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This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459
Views: 56770 Udacity
Symmetric Key and Public Key Encryption
 
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Modern day encryption is performed in two different ways. Check out http://YouTube.com/ITFreeTraining or http://itfreetraining.com for more of our always free training videos. Using the same key or using a pair of keys called the public and private keys. This video looks at how these systems work and how they can be used together to perform encryption. Download the PDF handout http://itfreetraining.com/Handouts/Ce... Encryption Types Encryption is the process of scrambling data so it cannot be read without a decryption key. Encryption prevents data being read by a 3rd party if it is intercepted by a 3rd party. The two encryption methods that are used today are symmetric and public key encryption. Symmetric Key Symmetric key encryption uses the same key to encrypt data as decrypt data. This is generally quite fast when compared with public key encryption. In order to protect the data, the key needs to be secured. If a 3rd party was able to gain access to the key, they could decrypt any data that was encrypt with that data. For this reason, a secure channel is required to transfer the key if you need to transfer data between two points. For example, if you encrypted data on a CD and mail it to another party, the key must also be transferred to the second party so that they can decrypt the data. This is often done using e-mail or the telephone. In a lot of cases, sending the data using one method and the key using another method is enough to protect the data as an attacker would need to get both in order to decrypt the data. Public Key Encryption This method of encryption uses two keys. One key is used to encrypt data and the other key is used to decrypt data. The advantage of this is that the public key can be downloaded by anyone. Anyone with the public key can encrypt data that can only be decrypted using a private key. This means the public key does not need to be secured. The private key does need to be keep in a safe place. The advantage of using such a system is the private key is not required by the other party to perform encryption. Since the private key does not need to be transferred to the second party there is no risk of the private key being intercepted by a 3rd party. Public Key encryption is slower when compared with symmetric key so it is not always suitable for every application. The math used is complex but to put it simply it uses the modulus or remainder operator. For example, if you wanted to solve X mod 5 = 2, the possible solutions would be 2, 7, 12 and so on. The private key provides additional information which allows the problem to be solved easily. The math is more complex and uses much larger numbers than this but basically public and private key encryption rely on the modulus operator to work. Combing The Two There are two reasons you want to combine the two. The first is that often communication will be broken into two steps. Key exchange and data exchange. For key exchange, to protect the key used in data exchange it is often encrypted using public key encryption. Although slower than symmetric key encryption, this method ensures the key cannot accessed by a 3rd party while being transferred. Since the key has been transferred using a secure channel, a symmetric key can be used for data exchange. In some cases, data exchange may be done using public key encryption. If this is the case, often the data exchange will be done using a small key size to reduce the processing time. The second reason that both may be used is when a symmetric key is used and the key needs to be provided to multiple users. For example, if you are using encryption file system (EFS) this allows multiple users to access the same file, which includes recovery users. In order to make this possible, multiple copies of the same key are stored in the file and protected from being read by encrypting it with the public key of each user that requires access. References "Public-key cryptography" http://en.wikipedia.org/wiki/Public-k... "Encryption" http://en.wikipedia.org/wiki/Encryption
Views: 480448 itfreetraining
What is a SHA-256 Cryptographic Hash Algorithm?
 
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In this video, I answer a question from one of the viewers of my YouTube channel YouTube.com/GeorgeLevy : What is a SHA-256 Cryptographic Hash Algorithm? Learn more about blockchain, and Bitcoin on my online video course Blockchain and Bitcoin Fundamentals at: http://BlockchainandBitcoinFundamentals.com Sign up to receive George Levy's FREE email newsletter and a video email course on blockchain, Bitcoin and cryptocurrency ($47 Value yours free) at: https://GeorgeLevy.com/Free Subscribe to this channel to stay up to date on new educational videos published each Thursday! Follow George Levy at the following links: https://GeorgeLevy.com (George Levy Website) https://Twitter.com/GeorgeLevy https://Facebook.com/GeorgeLevyBlockchain (Official Facebook Page) Special offer for George Levy channel viewers, open a new Bitcoin wallet for Free and get $10 bonus in Bitcoin at: https://blockchaininformer.com/btcwallet
Views: 10892 George Levy
Secure Hash Algorithm
 
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This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459
Views: 27706 Udacity
Password based Encryption / Decryption on Android with AES Algorithm
 
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Learn to Encrypt and Decrypt data on Android Applications with the Advanced Encryption Standard (AES) Algorithm. Note that this tutorial has been made by Tamil for the SSaurel's Channel. If you want to collaborate on the SSaurel's Channel, don't hesitate to send me your ideas for further details. ► Discover all the Android Apps offered by SSaurel Mobile Apps : https://play.google.com/store/apps/dev?id=6924401024188312025 ► Learn to create Android Apps step by step on the SSaurel's Blog : https://www.ssaurel.com/blog ► Enter in the Bitcoin and cryptocurrency World : https://www.toutsurlebitcoin.fr
Views: 32053 Sylvain Saurel
SHA-2 Cryptographic Hash Function
 
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For clearer illustrations, a .ppsx file (ppt slide show with narration) can be accessed at https://www.dropbox.com/s/j7k4c5nm3zgezp2/ppsxABU_SHA2_Presentation.ppsx
Views: 15952 Patricia Angela Abu
Hashing Lab
 
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Lab: https://dl.dropboxusercontent.com/u/40355863/csn11117_lab03.pdf
Views: 497 Bill Buchanan OBE
How to Break Cryptography | Infinite Series
 
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Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/donateinfi Only 4 steps stand between you and the secrets hidden behind RSA cryptography. Find out how to crack the world’s most commonly used form of encryption. Tweet at us! @pbsinfinite Facebook: facebook.com/pbsinfinite series Email us! pbsinfiniteseries [at] gmail [dot] com Previous Episode: Can We Combine pi & e into a Rational Number? https://www.youtube.com/watch?v=bG7cCXqcJag&t=25s Links to other resources: Shor's paper: https://arxiv.org/abs/quant-ph/9508027v2 Lecture on Shor's Algorithm: https://arxiv.org/pdf/quant-ph/0010034.pdf Blog on Shor's algorithm: http://www.scottaaronson.com/blog/?p=208 Video on RSA cryptography: https://www.youtube.com/watch?v=wXB-V_Keiu8 Another video on RSA cryptography: https://www.youtube.com/watch?v=4zahvcJ9glg Euler's Big Idea: https://en.wikipedia.org/wiki/Euler%27s_theorem (I can find a non-wiki article, but I don't actually use this in the video. It's just where to learn more about the relevant math Euler did.) Written and Hosted by Kelsey Houston-Edwards Produced by Rusty Ward Graphics by Ray Lux Made by Kornhaber Brown (www.kornhaberbrown.com) Challenge Winner - Reddles37 https://www.youtube.com/watch?v=bG7cCXqcJag&lc=z135cnmgxlbwch1ds233sbzgaojkivaz004 Comments answered by Kelsey: Joel David Hamkins https://www.youtube.com/watch?v=bG7cCXqcJag&lc=z13zdpcwyk2ofhugh04cdh4agsr2whmbsmk0k PCreeper394 https://www.youtube.com/watch?v=bG7cCXqcJag&lc=z135w324kw21j1qi104cdzvrpoixslmq1jw
Views: 189371 PBS Infinite Series
What is a HashTable Data Structure - Introduction to Hash Tables , Part 0
 
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This tutorial is an introduction to hash tables. A hash table is a data structure that is used to implement an associative array. This video explains some of the basic concepts regarding hash tables, and also discusses one method (chaining) that can be used to avoid collisions. Wan't to learn C++? I highly recommend this book http://amzn.to/1PftaSt Donate http://bit.ly/17vCDFx STILL NEED MORE HELP? Connect one-on-one with a Programming Tutor. Click the link below: https://trk.justanswer.com/aff_c?offer_id=2&aff_id=8012&url_id=238 :)
Views: 786729 Paul Programming
Cryptographic Hash Functions (Contd...2)
 
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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: 7693 nptelhrd
C# Tutorial - Encrypt and Decrypt a String | FoxLearn
 
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How to Encrypt and Decrypt a String in C#. The C# Basics beginner course is a free C# Tutorial Series that helps beginning programmers learn the basics of the C# Programming Language. This is the best way to Learn C# for beginners Encrypt your passwords with MD5 hashing in C# C# Salting & Hashing Passwords C# encrypting and decrypting using AES CBC, safe storing the encrypted data visual C# Adding AES encryption to C# application Forms Application encryption encrypt- decrypt with AES using C# Forms Application Advanced Encryption Standard Rijndael cipher Forms Application C# - Simple AES encryption using Visual C# cryptographic encrypt my 128 bit string using AES encryption cryptography C#
Views: 37053 Fox Learn
Public key cryptography - Diffie-Hellman Key Exchange (full version)
 
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The history behind public key cryptography & the Diffie-Hellman key exchange algorithm. We also have a video on RSA here: https://www.youtube.com/watch?v=wXB-V_Keiu8
Views: 627855 Art of the Problem
NETWORK SECURITY- AES (ADVANCED ENCRYPTION STANDARD) Algorithm
 
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AES algorithm is the Block Cipher Symmetric Algorithm Block Size is 128 bits Key Size is 128 bits ( 4 words or 16 Bytes ) Sub Key Size is 1 Word (32 bit) Number of Sub keys 44 Words Number of Rounds 10 Cipher Text Size is 128 bits
How We Created the First SHA-1 Collision and What it Means for Hash Security
 
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In this talk, we recount how we found the first SHA-1 collision. We delve into the challenges we faced from developing a meaningful payload, to scaling the computation to that massive scale, to solving unexpected cryptanalytic challenges that occurred during this endeavor. By Elie Bursztein Read More: https://www.blackhat.com/us-17/briefings/schedule/index.html#how-we-created-the-first-sha-1-collision-and-what-it-means-for-hash-security-7693
Views: 8563 Black Hat
What is digital signature?
 
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A digital signature is equivalent to a handwritten signature in paper, and a digital signature serves three basic purposes. Digital signature is commonly used for software distribution, financial transactions and other cases where it is important to detect forgery. Digital signatures are very popular with e-mail users. In this video, I will talk about the digital, uses, and the whole process of creating and sending digitally signed document over the Internet. Keep in mind, digital signature is not about encrypting document, just like paper-based signature. Playlist: Basic Cryptography https://www.youtube.com/watch?v=vk3py9M2IfE&list=PLSNNzog5eyduN6o4e6AKFHekbH5-37BdV Advanced Cryptography: https://www.youtube.com/watch?v=TmA2QWSLSPg&list=PLSNNzog5eydtwsdT__t5WtRgvpfMzpTc7 Please subscribe to my channel! Please leave comments or questions! Many thanks, Sunny Classroom
Views: 121853 Sunny Classroom
MD5 Hash Tutorial - What the MD5 hash means and how to use it to verify file integrity.
 
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Please like / share / subscribe if you like my MD5 hash tutorial! Here I explain how you use the MD5 hash of a file to verify its integrity in a simple MD5 hash tutorial. We use a windows based utility, md5sum.exe (http://www.etree.org/md5com.html) to check the integrity of a picture before and after we make an almost imperceptible change. Of course, we need not have used a picture, we could use any digital file to demonstrate the power of the MD5 hash for file integrity checking. As you will see in the video, using MD5 hashing, you can guarantee / verify the integrity of a Word document, a picture, a sound or video file or a software application. Reasons an integrity check might fail could be through file corruption on disk, communications corruption while downloading or even unauthorised tampering. I hope you enjoy the video, more coming soon. Music Credits : Music by Approaching Nirvana http://youtube.com/user/approachingnirvana Song: Death Of A King Buy the song on iTunes: http://bit.ly/SjRQBy
Views: 137684 Sean Browne
Java prog#129. How to encrypt and decrypt data in Java Part 1
 
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------------------Online Courses to learn---------------------------- Java - https://bit.ly/2H6wqXk C++ - https://bit.ly/2q8VWl1 AngularJS - https://bit.ly/2qebsLu Python - https://bit.ly/2Eq0VSt C- https://bit.ly/2HfZ6L8 Android - https://bit.ly/2qaRSAS Linux - https://bit.ly/2IwOuqz AWS Certified Solutions Architect - https://bit.ly/2JrGoAF Modern React with Redux - https://bit.ly/2H6wDtA MySQL - https://bit.ly/2qcF63Z ----------------------Follow--------------------------------------------- My Website - http://www.codebind.com My Blog - https://goo.gl/Nd2pFn My Facebook Page - https://goo.gl/eLp2cQ Google+ - https://goo.gl/lvC5FX Twitter - https://twitter.com/ProgrammingKnow Pinterest - https://goo.gl/kCInUp Text Case Converter - https://goo.gl/pVpcwL -------------------------Stuff I use to make videos ------------------- Stuff I use to make videos Windows notebook – http://amzn.to/2zcXPyF Apple MacBook Pro – http://amzn.to/2BTJBZ7 Ubuntu notebook - https://amzn.to/2GE4giY Desktop - http://amzn.to/2zct252 Microphone – http://amzn.to/2zcYbW1 notebook mouse – http://amzn.to/2BVs4Q3 ------------------Facebook Links ---------------------------------------- http://fb.me/ProgrammingKnowledgeLearning/ http://fb.me/AndroidTutorialsForBeginners http://fb.me/Programmingknowledge http://fb.me/CppProgrammingLanguage http://fb.me/JavaTutorialsAndCode http://fb.me/SQLiteTutorial http://fb.me/UbuntuLinuxTutorials http://fb.me/EasyOnlineConverter Password Encryption.java JAVA ENCRYPTION/DECRYPTION PROGRAM HELP Encrypting and Decrypting Java Cryptography using Java in Netbeans IDE Cryptography using Java in Netbeans IDE Java Cryptography APIs Cryptography Encrypting and Decrypting a text file in java
Views: 101673 ProgrammingKnowledge
SHA-1 Hash Tutorial
 
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Views: 57184 Gerald Hines
How Do Digital Signatures Work?
 
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In this video, I will be showing you how digital signatures are generated and how they help in establishing non-repudiation.
Views: 175031 Fasih Khatib
David Ashby on SHA256 [PWL NYC]
 
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PWLMini by David Ashby on SHA256! Meetup: http://bit.ly/2EBpwVL Paper: http://bit.ly/2EFx1uP Slides: http://bit.ly/2CI2r5X Audio: http://bit.ly/2CuJsfG ----------------------------------------------------------------------------------- Sponsored and hosted by Two Sigma (@twosigma) ----------------------------------------------------------------------------------- Description ------------------ While most of us use hash functions on a daily basis, few people can say that they truly understand what’s actually going on when they call SHA2("hello world"). Even fewer can say they’ve bothered to implement the function themselves, considering every introduction to cryptography starts off with a big warning saying to never, ever implement cryptographic primitives and just use vetted libraries due to the security implications. Of course, that important warning didn’t stop me from digging into the FIPS 180-4 spec (http://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.180-4.pdf) to scratch the itch to understand how exactly it works, and along the way get a much better intuition about what bitwise operators actually do, what a bit rotation is, and why hex notation actually matters. Bio ----- David Ashby (https://twitter.com/alazyreader) is a self-taught programmer and systems engineer who sometimes spends his weekends implementing hash functions in high-level languages. He also helps organize the meetup, but no nepotism was to blame for the existence of this presentation.
Views: 663 PapersWeLove
Mining Bitcoin with pencil and paper
 
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Bitcoins are mined using a cryptographic algorithm called SHA-256. This algorithm is simple enough to be done with pencil and paper, as I show in this video. Not surprisingly, this is a thoroughly impractical way to mine. One round of the algorithm takes 16 minutes, 45 seconds which works out to a hash rate of 0.67 hashes per day. For details, see http://righto.com/sha
Views: 1189634 Ken Shirriff
Hashing and Hash table in data structure and algorithm
 
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This video lecture is produced by S. Saurabh. He is B.Tech from IIT and MS from USA. hashing in data structure hash table hash function hashing in dbms To study interview questions on Linked List watch http://www.youtube.com/playlist?list=PL3D11462114F778D7&feature=view_all To prepare for programming Interview Questions on Binary Trees http://www.youtube.com/playlist?list=PLC3855D81E15BC990&feature=view_all To study programming Interview questions on Stack, Queues, Arrays visit http://www.youtube.com/playlist?list=PL65BCEDD6788C3F27&feature=view_all To watch all Programming Interview Questions visit http://www.youtube.com/playlist?list=PLD629C50E1A85BF84&feature=view_all To learn about Pointers in C visit http://www.youtube.com/playlist?list=PLC68607ACFA43C084&feature=view_all To learn C programming from IITian S.Saurabh visit http://www.youtube.com/playlist?list=PL3C47C530C457BACD&feature=view_all
Views: 324117 saurabhschool
Encrypt Password in Login Form with ASP.NET MVC and Entity Framework
 
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In this video, I will demo how to create Encrypt Password in Login Form with ASP.NET MVC and Entity Framework. To download all sources code for this demo please pay for me $5 at my PayPal Account: [email protected] ====================================================== You can see and download source code demo from my Apps at https://play.google.com/store/apps/developer?id=PMK+Lab ====================================================== You also can buy my apps in http://codecanyon.net/user/octopuscodes/portfolio ====================================================== You also can read my blog in http://learningprogramming.net/ ====================================================== You also can learn Microsoft Office in https://www.youtube.com/channel/UCFrMOR6KF4cpa92OOPRyOng ====================================================== TODAY IS A GREAT DAY TO LEARN SOMETHING NEW! ====================================================== Finding Software videos help you watch reviews for Open Sources:Joomla, wordpress, drupal, magento, html template, free admin template, free bootstrap admin templates, SilverStripe, Cake PHP, CodeIgniter, Concrete5, Modx, ExpressionEngine, Alfresco,TYPOlight, laravel, magento, angularjs, node.js, html, css, javascript, jquery, java, .net, wamp server, xampp, php, mysql, sql server, oracle, open sources, android, hibernate, jpa, html5, jquery
Views: 19255 Learning Programming
MD5 Encryption - Hindi
 
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MD5 Encryption (MD5 एन्क्रिप्शन) RSA डेटा सिक्योरिटी प्रयोग करके स्ट्रिंग के MD5 हैश की गणना करना, Inc.'s MD5 मैसेज-Digest Algorithm, और वो हैश रिटर्न करता है (यह एन्क्रिप्टिंग टेकनीक का एक तरीका है)। Syntax : string md5 ( string $str [, bool $raw_output = false ] ) एन्क्रिप्टिंग पासवर्ड्स में प्रयोग करता है और उनको डेटाबेस में संचित करता है।
Hashing - Introduction (in HINDI) | Data Structures
 
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Mail your queries at [email protected] #learnanythinganywhereanytime
Views: 32108 Palak Jain
Chapter 36 Hash Functions in Data Structure Hindi
 
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Like, Comments, Share and SUBSCRIBE
Will Quantum Computers break encryption?
 
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How do you secure messages over the internet? How do quantum computers break it? How do you fix it? Why don't you watch the video to find out? Why does this description have so many questions? Why are you still reading? What is the meaning of life? Facebook: https://www.facebook.com/frameofessence Twitter: https://twitter.com/frameofessence YouTube: https://www.youtube.com/user/frameofessence CLARIFICATIONS: You don't actually need a quantum computer to do quantum-safe encryption. As briefly mentioned at 7:04 , there are encryption schemes that can be run on regular computers that can't be broken by quantum computers. CORRECTIONS: [2:18] Technically, you can use any key to encrypt or decrypt whatever you want. But there's a specific way to use them that's useful, which is what's shown in the video. [5:36] In RSA, depending on exactly what you mean by "private key", neither key is actually derivable from the other. When they are created, they are generated together from a common base (not just the public key from the private key). But typically, the file that stores the "private key" actually contains a bit more information than just the private key. For example, in PKCS #1 RSA private key format ( https://tools.ietf.org/html/rfc3447#appendix-A.1.2 ), the file technically contains the entire public key too. So in short, you technically can't get the public key from the private key or vice versa, but the file that contains the private key can hold more than just the private key alone, making it possible to retrieve the public key from it. Video links: Encryption and HUGE numbers - Numberphile https://youtu.be/M7kEpw1tn50 The No Cloning Theorem - minutephysics https://youtu.be/owPC60Ue0BE Quantum Entanglement & Spooky Action at a Distance - Veritasium https://youtu.be/ZuvK-od647c Sources: Quantum Computing for Computer Scientists http://books.google.ca/books/about/Quantum_Computing_for_Computer_Scientist.html?id=eTT0FsHA5DAC Random person talking about Quantum MITM attacks http://crypto.stackexchange.com/questions/2719/is-quantum-key-distribution-safe-against-mitm-attacks-too The Ekert Protocol (i.e. E91) http://www.ux1.eiu.edu/~nilic/Nina's-article.pdf Annealing vs. Universal Quantum Computers https://medium.com/quantum-bits/what-s-the-difference-between-quantum-annealing-and-universal-gate-quantum-computers-c5e5099175a1 Images, Documents, and Screenshots: Post-Quantum Cryptography initiatives http://csrc.nist.gov/groups/ST/post-quantum-crypto/cfp-announce-dec2016.html http://pqcrypto.eu.org/docs/initial-recommendations.pdf Internet map (Carna Botnet) http://census2012.sourceforge.net/ Quantum network maps https://www.slideshare.net/ADVAOpticalNetworking/how-to-quantumsecure-optical-networks http://www.secoqc.net/html/press/pressmedia.html IBM Quantum http://research.ibm.com/ibm-q/ Music: YouTube audio library: Blue Skies Incompetech: Jay Jay Pamgaea The House of Leaves Premium Beat: Cutting Edge Technology Second Time Around Swoosh 1 sound effect came from here: http://soundbible.com/682-Swoosh-1.html ...and is under this license: https://creativecommons.org/licenses/sampling+/1.0/
Views: 668863 Frame of Essence
The Tiger & a Whirlpool-Attack
 
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Abstract. In this paper, we develop a new attack on Damg°ard-Merkle hash functions, called the herding attack, in which an attacker who can find many collisions on the hash function by brute force can first provide the hash of a message, and later herd any given starting part of a message to that hash value by the choice of an appropriate suffix. We focus on a property which hash functions should haveChosen Target Forced Prefix (CTFP) preimage resistanceand show the distinction between Damg°ard-Merkle construction hashes and random oracles with respect to this property. We describe a number of ways that violation of this property can be used in arguably practical attacks on real-world applications of hash functions. An important lesson from these results is that hash functions susceptible to collision-finding attacks, especially brute-force collision-finding attacks, cannot in general be used to prove knowledge of a secret value. Introduction Cryptographic hash functions are usually assumed to have three properties: Collision resistance, preimage resistance, and second preimage resistance. And yet many additional properties, related to the above in unclear ways, are also required of hash function in practical applications. For example, hash functions are sometimes used in commitment schemes, to prove prior knowledge of some information, priority on an invention, etc. When the information takes on more than a small number of possible values, there does not appear to be an obvious way to extend a collision finding attack to break the commitment scheme; therefore, collision resistance does not seem to be necessary to use the hash function in this way. This appears fortunate in light of the many recent attacks on collision resistance of existing hash functions[2, 3, 13, 19, 2124] and the widespread use of hash functions short enough to fall to brute-force collision attacks 20. We show that the natural intuition above is incorrect. Namely, we uncover (what we believe to be) subtle ways of exploiting the iterative property of Damg°ard-Merkle[6, 16] hash functions to extend certain classes of collision-finding attacks against the compression function to attack commitment schemes and other uses of hash function that do not initially appear to be related to collision resistance. http://www.cs.washington.edu/homes/yoshi/papers/EC06/herding.pdf http://video.google.com/videoplay?docid=-6086749167583048867 http://downloads.bistum-augsburg.de/108313636519180.pdf
Views: 910 vitrohype
Digital Signature in Hindi
 
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This Tutorial Explain What is Digital Signature in Hindi. A Digital Signature in Hindi (not to be confused with a digital certificate) is a mathematical technique used to validate the authenticity and integrity of a message, software or digital document. It Covers Points like digital signature in cryptography in hindi, digital signature in network security and digital signature in dbms(advance database management system) Digital Signature Use Asymatric Key to Encrypt Data. Digital signatures are often used to implement electronic signatures, a broader term that refers to any electronic data that carries the intent of a signature How digital signatures work Digital signatures are based on public key cryptography, also known as asymmetric cryptography. Using a public key algorithm such as RSA, one can generate two keys that are mathematically linked: one private and one public. To create a digital signature, signing software (such as an email program) creates a one-way hash of the electronic data to be signed. The private key is then used to encrypt the hash. The encrypted hash -- along with other information, such as the hashing algorithm -- is the digital signature. The reason for encrypting the hash instead of the entire message or document is that a hash function can convert an arbitrary input into a fixed length value, which is usually much shorter. This saves time since hashing is much faster than signing. Subscribe my Channel: https://goo.gl/FYkHc5 Reference Link: https://en.wikipedia.org/wiki/Digital_signature
Views: 3760 Introtuts
What are certificates?
 
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Certificates are used to prove identity and used for creating secure communication. Check out http://itfreetraining.com for more of our always free training videos. This video looks at how a certificate works, what is a certificate and how they are used for identification and secure communication. Download the PDF handout http://itfreetraining.com/Handouts/Certificates/WhatAreCertificates.pdf What is a certificate? A certificate is an electronic document that contains data fields. When compared to a traditional paper certificate there are some similarities between an electronic certificate and a physical certificate. Digital certificates like a physical certificate are issued by an authority. For example, a university may issue a certificate to a student to show that they have completed the necessary work in order to graduate. The next question is, would you trust a physically certificate? Digital certificates work the same way. They are issued from an authority and the question becomes would you trust the authority that issued the certificate? Electronic certificates also contain other fields like who or what the certificate was issued to, how long it is valid, the public key and the digital signature. If a digital certificate is presented to a user or computer, the user or computer is able to check the certificate to ensure the person using it should be using it. Also the certificate contains a digital signature which allows the certificate to be checked to make sure it has not been modified. Digital Signature A digital signature provides a method for a certificate to be checked to ensure it has not been modified. In order to do this, a hash value is created for the certificate. To generate a hash value the certificate is put through a function to create a single value. Hash functions are designed so different certificates will not produce the same value, however the hash value cannot be used to generate the original certificate. The same principal applies to a person's fingerprints. They can be used to identify a person, however using a finger print you could not work out the features of a person like what color hair they have. When a certificate is created, the hash value for that certificate is also created. Using a function involving the private key, a digital signature is created and added to the certificate. Digital Signature Example When a certificate is used, in order to check the certificate has not been changed, the following is done: The computer generates the hash value for the certificate. Next, the digital signature is put through a function using the public key which should result in the same hash value. If both values match, the certificate has not been modified. This prevents a 3rd party taking a certificate, changing the values in the certificate and using the certificate. Trust Model Certificates work off a trust model. An example of a trust model in computers is that a computer may have a sticker on it indicating which operating systems it will run. The consumer, seeing this sticker, must trust that the manufacture would not put this sticker on the laptop unless it will run that operating system. The customer must also trust the creator of that operating system would not allow a computer manufacturer to put a sticker on a computer that would not run that operating system. Certificate Trust Model Certificates are generally deployed in a hierarchy. At the top is the root certificate authority. This can be an internal Certificate Authority or an external authority like VeriSign. When an authority like VeriSign issues a certificate, they will perform a number of checks on the individual purchasing the certificate to ensure that they are a valid business. When a certificate is used it can be checked to see which authority issued that certificate. In order for the certificate to be used, the computer must trust the authority that it was issued from. Authorities like VeriSign are trusted by default on most operating systems. Certificate Error If a certificate is presented to the computer and it is not trusted, the computer will generate an error asking if the users want to trust the certificate. It is up to the user to decide if they believe the certificate is valid. Certificate Hierarchy Certificates use a hierarchy. At the top is the root CA, below these are subordinate CA's. Any level can issue certificates to subordinate CA's or direct to users, computers or devices. If the user, computer or device trusts the root CA, then any certificate that is issued by any CA in the hierarchy will automatically be trusted and thus used by the client. References "MCTS 70-640 Configuring Windows Server 2008 Active Directory Second edition" pg 771-775 "Public key certificate" http://en.wikipedia.org/wiki/Public_key_certificate
Views: 500611 itfreetraining
Java Tutorial - How to encrypt and decrypt file using DES algorithm
 
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Java tutorial on how to encrypt and decrypt files using DES algorithm implementation in Java programming language
Views: 8012 Zoran Davidović
Bitcoin - Digital Signatures
 
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A high-level explanation of digital signature schemes, which are a fundamental building block in many cryptographic protocols. More free lessons at: http://www.khanacademy.org/video?v=Aq3a-_O2NcI 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: 141489 Khan Academy
Lecture 1.2 – Hash Pointers and Data Structures [Bitcoin and Cryptocurrencies]
 
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In section 1.2, we're going to talk about Hash Pointers and their application. A hash pointer is a kind of data structure that turns out to be used a lot in the systems that we're talking about. And a hash pointer is basically a simple thing, that we're going to take a pointer to where some information is stored. And we're going to together with the pointer store a cryptographic hash of the information. So whereas a regular pointer gives you a way to retrieve the information. A hash pointer is gonna let us ask to get the information back. A lecture from the Coursera course Bitcoin and Cryptocurrency Technologies, as taught by Arvind Narayanan, Joseph Bonneau, Edward Felten, Andrew Miller, and Steven Goldfeder of Princeton University. Enroll in the Coursera course at https://www.coursera.org/learn/cryptocurrency. Check out a free draft of the textbook at https://d28rh4a8wq0iu5.cloudfront.net/bitcointech/readings/princeton_bitcoin_book.pdf.
Views: 339 Colin McDonnell
[Hindi] What is Cryptography ? | Kya hai cryptography ? | Explained in simple words
 
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Hello Dosto Aaj hum baat karenge cryptography ke bare me ki ye kya hota hai aur iska itemaal kaise aur kaha hota hai. iska sambandh kisi bhi data ya message ko safely pohchane se hota hai aur uski security badhayi jati hai taaki bich me koi an-adhikarik tarike se usko access na kar paye. aasha karta hoo apko ye video pasand ayegi agar aapko ye video achhi lage to isse like kare aur apne dosto ke sath share kare aur abhi tak aapne mera channel subscribe nahi kia hai to jarur is channel ko subscribe kare. Subscribe to my channel for more videos like this and to support my efforts. Thanks and Love #TechnicalSagar LIKE | COMMENT | SHARE | SUBSCRIBE ---------------------------------------------------------------------------------- For all updates : SUBSCRIBE Us on Technical Sagar : www.youtube.com/technicalsagarindia LIKE us on Facebook https://www.facebook.com/technicalsagarindia Follow us on Twitter : http://www.twitter.com/iamasagar
Views: 94584 Technical Sagar
What are Digital Signatures and How Do They Work?
 
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What is a Digital Signature? In this animation, we will explain how digital signatures work using cryptography. In some ways, digital signatures do what their names suggest: they provide validation in the same way signatures do, in digital form. 👩‍🎓👨‍🎓Learn blockchain fast at the Lisk Academy: https://lisk.io/academy Thanks for watching! Lisk makes it easy for developers to build and deploy blockchain applications in JavaScript. Learn about the leading platform for world-changing dapps at https://lisk.io/products. 👨‍💻👩‍💻 For developers: Documentation: https://lisk.io/documentation GitHub: https://github.com/LiskHQ Gitter: https://gitter.im/LiskHQ/lisk 🗞Read our latest news on the blog: https://blog.lisk.io/ 💼 Check our current job openings! https://angel.co/lisk 👨‍🚀 Meet the team: https://lisk.io/team 🔒 Manage your LSK in the official wallet: https://lisk.io/hub 🔎 View our blockchain explorer: https://explorer.lisk.io/ ⚙️ Get the all new Lisk Hub: https://lisk.io/hub/index.html#/ 🎥 For media inquiries, please email us at press [at] lisk [dot] io. 👫Join our community channels: Reddit: http://reddit.com/r/lisk Lisk.chat: https://lisk.chat/ Twitter: http://twitter.com/liskhq Telegram: https://t.me/Lisk_HQ Facebook: http://facebook.com/liskhq
Views: 4710 Lisk
Differential Cryptanalysis
 
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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: 14525 nptelhrd
IOTA tutorial 6: Why you should not reuse an address for outgoing transactions
 
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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 6 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. Digital signatures are used for authentication, integrity checking and non-repudiation.  Development of quantum computers threatens the security of currently used digital signature algorithms such as Rivest–Shamir–Adleman (RSA) and Elliptic Curve Digital Signature Algorithm (ECDSA). Cryptographers developed a variety of quantum-resistant alternatives of which hash based signatures are the most promising. Hash based signatures are based on so called One Time Signatures (OTS). The term implies that a single public/private key pair must only be used once. Otherwise, an attacker is able to reveal more parts of the private key and spoof signatures. In 1979 Leslie Lamport created a method to construct digital signatures using only cryptographically secure one way hash functions. This method is called the Lamport signature or Lamport One Time Signature (OTS) scheme. Other One Time Signature schemes are the Merkle OTS and Winternitz OTS. The Lamport One Time Signature scheme is very easy to understand and is VERY LOOSELY comparable to Winternitz OTS. For simplicity's sake I will be using the Lamport One Time Signature scheme explaining why you should never reuse an IOTA address for outgoing transactions. Alice uses a random number generator and produces two pairs of 256 random numbers, total 512 numbers. Each random number is 256 bits in size. These random numbers forms the private key. Each of the 512 random numbers are separately hashed, using for example SHA-256. These hashed random numbers forms the public key. Alice has a document (or transaction data) which is hashed using SHA-256. The document hash is of course 256 bits long: 101..011 Alice wants to create a digital signature for her document. She applies the following procedure: - Loop thru each bit (n) of the hash from 0-255. - If the bit is a 0, publish the nth number from pair 0. - If the bit is a 1, publish the nth number from pair 1. - When all bits are looped, destroy all unused numbers from pair 0 and 1. This produces a sequence of 256 random numbers. The digital signature is a sequence of 256 random numbers. After the digital signature is created, delete all unused numbers from the private key. The digital signature consist half of the private key, the other 256 random numbers are still unknown and thus nobody can create signatures that fit other message hashes. Alice sends her document, together with the corresponding digital signature and public key to Bob. Bob wants to verify Alice's document signature. He first hashes the document using SHA-256. The document hash is again: 101..011 Bob follows the same steps when Alice created the digital signature, but instead uses the public key. Bob produces a sequence of 256 hashes picked from Alice's public key. Bob now hashes each of the random number in the digital signature. If both sequence of hash numbers match then the signature is ok. The Lamport signature creates a digital signature which reveals part of the private key. The private key has 512 numbers and using it once will reveal 256 numbers. Using the private key twice weakens the security of the scheme again by half. The probability of an attacker being able to successfully forge a signature for a given message increases from 1/(2^256) to 1/(2^128). A third signature using the same key would increase the probability of a successful forgery to 1/(2^64) and a fourth signature to 1/(2^32), and so on. Please note IOTA's signature scheme is based on the Winternitz One Time Signature (WOTS) scheme and is NOT the same as the Lamport signature scheme. However by using the Lamport One Time Signature scheme I am trying to give you a very simplistic understanding why you should never reuse an IOTA address for outgoing transactions. Check out all my other IOTA tutorial videos: https://goo.gl/aNHf1y Subscribe to my YouTube channel: https://goo.gl/61NFzK 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: 5643 Mobilefish.com
How we created the first SHA-1 collision and what it means for hash security - Defcon 25
 
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Recording of my Defcon 25 talk about SHA-1 More information: https://www.elie.net/sha1 In this talk, we recount how we found the first SHA-1 collision. We delve into the challenges we faced from developing a meaningful payload, to scaling the computation to that massive scale, to solving unexpected cryptanalytic challenges that occurred during this endeavor.
Views: 8235 Elie Bursztein
Email Encryption & Digital signature presentation
 
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-- Created using PowToon -- Free sign up at http://www.powtoon.com/join -- Create animated videos and animated presentations for free. PowToon is a free tool that allows you to develop cool animated clips and animated presentations for your website, office meeting, sales pitch, nonprofit fundraiser, product launch, video resume, or anything else you could use an animated explainer video. PowToon's animation templates help you create animated presentations and animated explainer videos from scratch. Anyone can produce awesome animations quickly with PowToon, without the cost or hassle other professional animation services require.
Views: 2894 Abdulrhmannnn Awadh
What You Should Know About IOTA
 
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Thinking about purchasing a Ledger Nano Hardware Wallet? Browse their official website: https://www.ledgerwallet.com/r/67ef Want to join coinbase to begin your crypto journey? Here’s a link to get free $10: https://www.coinbase.com/join/558828dc34383271a500003b Step up your game and Check Out Binance too: https://www.binance.com/?ref=10080191 Join the Robinhood app and invite your friends to Robinhood and win free stock. Here's my invite: http://share.robinhood.com/heidic1 Find me on Steemit: www.steemit.com/@heiditravels Twitter: @blockchainchick Instagram: @hheidiann If you’re looking for an app that tracks the price of BTC & ETH and many other coins, check out the CoinView App: https://play.google.com/store/apps/details?id=br.com.freeflowt.coinview LINKS FOR ADDITIONAL READING FOR THIS VIDEO & ALL INFO IN TEXT DOWN BELOW IOTA Website: https://iota.org/ White Paper: https://iota.org/IOTA_Whitepaper.pdf IOTA GitHub: https://github.com/iotaledger Great Blog Posts by Roman Semko: (1) https://medium.com/deviota/iota-why-free-transactions-matter-most-f90fd6f4383c(2) https://medium.com/deviota/decentralised-cryptocurrency-is-dead-c1763dc75efb Overview of Hashgraph: http://www.swirlds.com/downloads/Overview-of-Swirlds-Hashgraph.pdf Definition of DAGs: https://en.wikipedia.org/wiki/Directed_acyclic_graph Blog on IOTA and Internet of Things: https://medium.com/@MartinRosulek/how-iota-makes-future-for-internet-of-things-af14fd77d2a3 IOTA Tangle Security Concerns: https://medium.com/@neha/cryptographic-vulnerabilities-in-iota-9a6a9ddc4367 IOTA Team Addresses Security Concerns: https://blog.iota.org/curl-disclosure-beyond-the-headline-1814048d08ef For those who have spent at least a little bit of time in the crypto space, it shouldn’t come as a complete surprise that people are searching for better ways to accomplish the same things that blockchains can. It certainly isn’t inaccurate to say that blockchain technology was developed in an effort to circumvent the currenct financial system and all of those annoying middlemen. The goal was always to bring decentralization to all and to finally empower individuals to take control of their wealth, to be their own bank. But now, looking at the largest and arguably the most successfully crypto in regards to adoption, the one we all know as Bitcoin, we’re beginning to see this ideology taking the backseat. Mainly, there is no doubt a type of centralization occurring with the mining pools of bitcoin. There are now a handful of companies who can control the transactions of Bitcoin. The only reason there was room for this to happen is thanks to the inclusion of transaction fees as a way to motivate miners to participate in the network. Despite Satoshi’s best efforts to invent a system that could undermine the greedy financial system as we know it today, because money is still being used as a motivator in this new system, and us still being humans that are running it, we are still vulnerable of our human condition, in this case, that is to be greedy. We are always looking for fast transactions, low or no fees and complete decentralization. Many cryptos have these perks right now, but the issue that hangs over everyone’s head is that of scalability. This is where IOTA can be a game changer, and here’s why. IOTA uses a type of DAG that they are calling “Tangle.” In their system, if you want to participate in their network, if you want to make transactions on their network, you need to help. For every transaction you’d like to submit on IOTAs Tangle, you will have to process two transactions from other users. This shifts the motivating factor from extrinsic (that is only processing transactions for the sake of getting paid) to intrinsic (you help to secure the network so that you may also take part in it.) This also means that the more users of this network, the faster the transactions will be confirmed. IOTA has the potential to be completely decentralized, but for now, in its beginning stages, the network uses what you could call a bottleneck that they refer to as the “Coordinator.” So for now, it hasn’t yet reached it’s ideal status of being completely decentralized. That being said, there are some security concerns that have been voiced. One of the points has to do with a flaw in the custom hash function called Curl. Basically, instead of taking tried and true cryptographic primitives to build their system, the IOTA team decided to write their own hash function called Curl. Basically, this can open the door for vulnerabilities concerning the validation of transactions. If you’d like to learn more about this concern and how the IOTA team has since addressed the issue you can always take a look at their blog.
Views: 23165 Crypto Tips
Encryption Part II: Security on the Web 3
 
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A look at what server administrators should be doing to secure their users' passwords—and how a lot of them AREN'T doing it. UPDATE: Collision found in SHA-1 hashing algorithm: http://thehackernews.com/2017/02/sha1-collision-attack.html Consumer Password Worst Practices: http://www.imperva.com/docs/wp_consumer_password_worst_practices.pdf Salted Password Hashing - Doing it Right: https://crackstation.net/hashing-security.htm Comparing Bank Password Requirements: https://docs.google.com/spreadsheets/d/1Z_qscNYF4fjzKoD79FlRpTV0LOw0VxceS8F16aFJoN4/edit MD5 considered harmful today http://www.win.tue.nl/hashclash/rogue-ca/
Views: 6788 Shane Killian
Rainbow Tables
 
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Summary Extended coverage of rainbow tables and Ophcrack software. Rainbow tables are precomputed hashes of files, so Rainbow tables allow a simple 'lookup' between a table and a hash. 6:08 - Ophcrack usage Reference Materials http://ophcrack.sourceforge.net - Ophcrack Homepage http://ophcrack.sourceforge.net/download.php - Ophcrack Downloads http://sourceforge.net/apps/mediawiki/ophcrack/index.php?title=Ophcrack_Howto - Ophcrack Howto http://sourceforge.net/apps/mediawiki/ophcrack/index.php?title=Frequently_Asked_Questions - Ophcrack FAQ Additional Information Biometrics: Authenticating by who you are ...
Neuroscience Meets Cryptography: Designing Crypto Primitives Secure Against Rubber Hose Attacks
 
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This video is part of the Infosec Video Collection at SecurityTube.net: http://www.securitytube.net Neuroscience Meets Cryptography: Designing Crypto Primitives Secure Against Rubber Hose Attacks Slide : - https://www.usenix.org/system/files/conference/usenixsecurity12/sec12-final25.pdf Cryptographic systems often rely on the secrecy of cryptographic keys given to users. Many schemes, however, cannot resist coercion attacks where the user is forcibly asked by an attacker to reveal the key. These attacks, known as rubber hose cryptanalysis, are often the easiest way to defeat cryptography. We present a defense against coercion attacks using the concept of implicit learning from cognitive psychology. Implicit learning refers to learning of patterns without any conscious knowledge of the learned pattern. We use a carefully crafted computer game to plant a secret password in the participant.s brain without the participant having any conscious knowledge of the trained password. While the planted secret can be used for authentication, the participant cannot be coerced into revealing it since he or she has no conscious knowledge of it. We performed a number of user studies using Amazon.s Mechanical Turk to verify that participants can successfully re-authenticate over time and that they are unable to reconstruct or even recognize short fragments of the planted secret.
Views: 517 SecurityTubeCons
Ever wonder how Bitcoin (and other cryptocurrencies) actually work?
 
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Bitcoin explained from the viewpoint of inventing your own cryptocurrency. Videos like these made possible by patreon: https://patreon.com/3blue1brown Protocol Labs: https://protocol.ai/ Interested in contributing? https://protocol.ai/join/ Special thanks to the following patrons: http://3b1b.co/btc-thanks Some people have asked if this channel accepts contributions in cryptocurrency form as an alternative to Patreon. As you might guess, the answer is yes :). Here are the relevant addresses: ETH: 0x88Fd7a2e9e0E616a5610B8BE5d5090DC6Bd55c25 BTC: 1DV4dhXEVhGELmDnRppADyMcyZgGHnCNJ BCH: qrr82t07zzq5uqgek422s8wwf953jj25c53lqctlnw LTC: LNPY2HEWv8igGckwKrYPbh9yD28XH3sm32 Supplement video: https://youtu.be/S9JGmA5_unY Music by Vincent Rubinetti: https://soundcloud.com/vincerubinetti/heartbeat Here are a few other resources I'd recommend: Original Bitcoin paper: https://bitcoin.org/bitcoin.pdf Block explorer: https://blockexplorer.com/ Blog post by Michael Nielsen: https://goo.gl/BW1RV3 (This is particularly good for understanding the details of what transactions look like, which is something this video did not cover) Video by CuriousInventor: https://youtu.be/Lx9zgZCMqXE Video by Anders Brownworth: https://youtu.be/_160oMzblY8 Ethereum white paper: https://goo.gl/XXZddT If you want to contribute translated subtitles or to help review those that have already been made by others and need approval, you can click the gear icon in the video and go to subtitles/cc, then "add subtitles/cc". I really appreciate those who do this, as it helps make the lessons accessible to more people. Music by Vince Rubinetti: https://vincerubinetti.bandcamp.com/album/the-music-of-3blue1brown ------------------ 3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe, and click the bell to receive notifications (if you're into that). If you are new to this channel and want to see more, a good place to start is this playlist: http://3b1b.co/recommended Various social media stuffs: Website: https://www.3blue1brown.com Twitter: https://twitter.com/3Blue1Brown Patreon: https://patreon.com/3blue1brown Facebook: https://www.facebook.com/3blue1brown Reddit: https://www.reddit.com/r/3Blue1Brown
Views: 2472085 3Blue1Brown
How to Encrypt Strings and Files in Python
 
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In this video I show you how to encrypt and decrypt strings and files using Python. I show you how to create a key, store the key and then how to use the key to encrypt and decrypt strings and files. This video demonstrates the use of the cryptography module. 🌎 Post with code and a written tutorial: https://nitratine.net/blog/post/encryption-and-decryption-in-python/ 📺 Auto Py to Exe: https://youtu.be/OZSZHmWSOeM 📺 Python GUI Using Chrome: https://youtu.be/2kbeBzEQfXE 📺 How to Send Emails in Python: https://youtu.be/YPiHBtddefI The cryptography is supported by Python 2.7 and Python 3.4 and above. (Also PyPy 5.3+) 🌎 cryptography docs: https://cryptography.io/en/latest/ 🐍 In this video I use Python 3.6. 👍🏼 Feel free to comment with any issues.
Views: 11911 PyTutorials
Ⓑ Blockchain Overview: Bitcoin, Cryptocurrency, Cryptography, & Satoshi Nakamoto
 
02:18:55
In this video I go over a very extensive overview of all things Blockchain, from its initial public appearance through the creation of Bitcoin cryptocurrency to the endless applications. I also cover some of the mathematics that make all of this possible, which is in advancements in Cryptography, or the study of securing communications in the midst of third parties. The first implementation of a decentralized peer-to-peer distributed ledger that solves what it is known as the Byzantine Generals’ Problem as well as the infamous digital Double Spending problem was in 2009 by an anonymous person or group known as Satoshi Nakamoto, and in the form of a digital currency called Bitcoin. The implementation of Bitcoin, a year after its 2008 whitepaper illustrating the concept, utilized the first decentralized Blockchain algorithm. In just under 10 years, the value of Bitcoin has skyrocketed to $7000+ USD per coin as of the making of this video. But the underlying technology, a distrusted Blockchain has some truly game-changing capabilities. Blockchain technology is made possible by the mathematics of Cryptography, namely the development of the Public-key or Asymmetric key encryption concept. This is a seemingly simple concept but its implications are monumental. Through the use of mathematical “one-way functions” that are easy to solve in one direction and extremely difficult to solve in the other, it is possible to share encrypted messages even if the third party gained full access to all the communications channels! Extending this to the blockchain, blocks of data with cryptographically secured by a timestamp can be chained together to form one very long secure chain. This chain of blocks, known as the blockchain, serves as the single agreed upon history of by all computers and thus people using the blockchain; all this without a central authority! Other concepts I cover in this very long video is in Cryptocurrency Wallets, hard vs soft forks, the Bitcoin whitepaper, my favorite blockchain technology Steemit, and some of the things to know before creating your own cryptocurrency or heavily investing in a relatively unknown company. But as with all of my recent videos, I need to include a full disclosure into my views on Blockchain and all technology for that matter, and which is that I view most advancements in technology as a result of the powers-that-shouldn’t-be trickling down tech to us in a gradual manner. It is done this way so that there isn’t too much of a disruption to the current establishment and to better steer the world into more centralization. To learn more about my reasoning here, make sure to follow my ongoing video series on 9/11 and free energy: https://mes.fm/911truth-playlist and https://mes.fm/freeenergy-playlist. Blockchain technology, although has the ability to decrease centralization of control, it ironically can do just the opposite if its access is restricted by the governmental corporate monopolies such as the CIA, Apple, Google, Amazon, and Facebook. But whether Blockchain is a trickle-down technology or a truly great innovation by Satoshi Nakamoto, it nonetheless is a very special technology which if we smarten up, and avoid the consumerism propaganda pushed at us at all levels of society, we may in fact be able to use it to ensure a truly self-sufficient lifestyle free of government tyranny… PDF Notes:: https://1drv.ms/b/s!As32ynv0LoaIh4dVs3zFksqAN2pZnQ Steemit Notes: https://steemit.com/blockchain/@mes/blockchain-overview-bitcoin-cryptocurrency-cryptography-and-satoshi-nakamoto Related Videos: Steemit Overview: Social Media, Steem Blockchain #GetOnSteem: https://youtu.be/1RBzUDRScyQ Steemit Tutorial: Steem (STEEM), Steem Power (SP), and Steem Dollars (SMD): https://youtu.be/F5f1duDJG9Q ✈️#911Truth Part 6: Controlled Opposition: 'Mini Nukes', 'Building 7', AE911Truth Hoax: https://youtu.be/aDWgsVSo4Oc ⚡#FreeEnergy Part 2: Nuclear Physics Overview + Cold Fusion: https://youtu.be/wMB5xmONX58 . ------------------------------------------------------ SUBSCRIBE via EMAIL: https://mes.fm/subscribe DONATE! ʕ •ᴥ•ʔ https://mes.fm/donate Like, Subscribe, Favorite, and Comment Below! Follow us on: Official Website: https://MES.fm Steemit: https://steemit.com/@mes Gab: https://gab.ai/matheasysolutions Minds: https://minds.com/matheasysolutions Twitter: https://twitter.com/MathEasySolns Facebook: https://fb.com/MathEasySolutions Google Plus: https://mes.fm/gplus LinkedIn: https://mes.fm/linkedin Pinterest: https://pinterest.com/MathEasySolns Instagram: https://instagram.com/MathEasySolutions Email me: [email protected] Try our Free Calculators: https://mes.fm/calculators BMI Calculator: https://bmicalculator.mes.fm Grade Calculator: https://gradecalculator.mes.fm Mortgage Calculator: https://mortgagecalculator.mes.fm Percentage Calculator: https://percentagecalculator.mes.fm Try our Free Online Tools: https://mes.fm/tools iPhone and Android Apps: https://mes.fm/mobile-apps
Views: 487 Math Easy Solutions
How to use Ophcrack and Rainbow Tables to crack a password hash
 
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A quick tutorial on using the Ophcrack program and downloadable rainbow tables to reveal a hashed Windows password. http://danscourses.com
Views: 65752 danscourses