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Hashing Passwords | Node Authentication Tutorial – Part 3
 
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Learn the basics behind hashing users' passwords and why it is so very important to do this within any password related app. When it comes to securing your users' passwords, it's integral, no, absolutely necessary to hash your users' passwords before storing them in a database. Hashing is the process of scrambling up a user's password into a long string of characters that's undecipherable. The interesting thing about hashing: once you put the password in the hasher, there's no way to convert it back to its original form (at least from a mathematical standpoint). This helps ensure that your users' passwords are unreadable in the off chance someone happens to stumble upon the data in your database. Code along with me as I demonstrate how to implement hashing functionality into our user based node app. bcrypt npm link: https://www.npmjs.com/package/bcrypt Video Git Repo (starts at part 1): ------------------------------------------------ https://github.com/christopher4lis/express-cc Node Authentication Process: ------------------------------------------ // Add our boilerplate // 1.x Git clone express-cc repo // 2.x Run yarn / npm install // Create a new user in the database // 1.x Create a form within a view // 2.x Create route that'll process the form's post request // 3.x Create a database connection using .env file // 4.x Grab form input and insert into database // 5.x Add express-validation package // 6.x Validate user input on backend // 7.x Validate user input on frontend // 8.x Hash our user's password // 9.x Store user in database // Login user (update user session, return auth cookie) // 1. Install passport // 2. Configure passport with local strategy // Protect routes and only permit entry with authorization cookie // Create logout button // Create login page Video Timeline: ----------------------------- 00:50 - Why storing passwords in plain text is bad 01:36 - What is hashing? 02:35 - How to hash our users' passwords 03:05 - What is bcrypt? 06:01 - What is a salt? 07:08 - Testing out our hashing implementation To be continued... The Platform: ------------------------- http://chriscourses.com is a platform in progress whose goal is to educate aspiring and seasoned web developers via story driven learning. Each course tells a different story, and each milestone reveals a different scene. With an expansive universe to explore, you can track your progress, and gain the necessary skills needed to build your dreams. For updates on the progress of chriscourses.com and future videos, join the Chris Courses mailing list at http://chriscourses.com. Chris Courses Social: ----------------------------------- Twitter: https://twitter.com/chriscourses Facebook: https://www.facebook.com/chriscourses Christopher Lis Social: ------------------------------------- Twitter: https://twitter.com/christopher4lis CodePen: http://codepen.io/christopher4lis
Views: 16003 Chris Courses
Let's Show #77 - JavaScript Tutorial - Hash Password | SHA3 | CryptoJS | googlecode | HTML
 
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JavaScript Tutorial: So hasht ihr euer Passwort mit CryptoJS. ⇓⇓⇓⇓⇓⇓⇓⇓⇓⇓⇓⇓⇓⇓Links⇓⇓⇓⇓⇓⇓⇓⇓⇓⇓⇓⇓⇓⇓ Amazon-Link: http://amzn.to/1yr6OdD Günstige Spiele: https://www.g2a.com/r/sawmyname Meine Buchempfehlungen: C#: http://amzn.to/1sW4Mdb Python: http://amzn.to/Zc3T9g CSS: http://amzn.to/1uhO4uy JavaScript: http://amzn.to/1mJNy6n Java: http://amzn.to/1pbGv1z Facebook: https://www.facebook.com/pages/Event-Handler/1495860210672727
Views: 3599 Event Handler
Passwords & hash functions (Simply Explained)
 
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How can companies store passwords safely and keep them away from hackers? Well let's find out! With all the data breaches lately, it's likely that the password of one of your accounts has been compromised. Hackers now might know the password you've used, but they also might not.. To understand why, we'll take a look at what methods a company can use to protect user passwords. We'll take a look at encryption, hash functions and a multilayer approach! 📚 Sources Can be found on my website: https://savjee.be/videos/simply-explained/hash-functions/ 🌍 Social Twitter: https://twitter.com/savjee Facebook: https://www.facebook.com/savjee ✏️ Check out my blog https://www.savjee.be
NodeJs - Symmetric Encryption (Module Crypto)
 
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Learn to Encrypt and Decrypt Text With NodeJS using Module "Crypto". Easy and simple to use and very helpful in cases when you want to store information in database in encrypted form.
Views: 5416 Aman Kharbanda
NodeJS Create MD5 Hash
 
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Learn how to Create MD5 Hash in NodeJS.
Views: 1885 DevNami
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: 8067 Fullstack Academy
Password Hashing, Salts, Peppers | Explained!
 
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---------------------------------------------------------------------------------------------- Check out my site: http://www.seytonic.com Follow me on twitter: https://twitter.com/seytonic
Views: 51110 Seytonic
Creating Custom Encryption and Decryption Engine with JavaScript
 
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In this video tutorial I will show you how to create a simple Encryption and Decryption engine in JavaScript. Visit this link to view the source code: http://zofiakreasi.com/creating-custom-encryption-and-decryption-engine-with-javascript/
Views: 2108 ThirteeNov
NodeJS - Using BCrypt for Database Encryption - Tutorial 9
 
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Encrypting passwords using BCrypt to save in our mongoDB. Tutorial Source can be found @ https://github.com/BrentAureli/Youtube-Tutorials Credit: Various code snippets from http://scotch.io (some edited some not)
NodeJS Create MD5 Hash from String
 
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Learn how to Create MD5 Hash from String in Node JS.
Views: 76 DevNami
How to create JWT (JSON web token) using pure JavaScript (and Crypto-Js)
 
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-How to convert any string to base64 -How to do base64 encoding/decoding -How to create JWT (JSON Web Token) from the scratch -How to use pure JavaScript to create JWT -How to use Crytpo-JS to create JWT using JavaScript
Views: 15347 Tech CBT
How To Hash A Password W/ BCrypt & Node.js | Project Ep. 4
 
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Hash a password/string // Today we will learn how to hash a password with a node module called BCrypt. BCRYPT DOCUMENTATION https://www.npmjs.com/package/bcrypt PREVIOUS VIDEO https://youtu.be/76LH_32KxX8 GITHUB LINK https://github.com/airclique/project-1 ::VIDEO TIMESTAMP:: 2:53 Installing Crypt Module 3:59 What must get done 4:48 Create hash password logic 10:33 Attach hash password logic to mongoose schema 11:53 Hash user password before save FIND ME HERE: Website http://www.airclique.com Facebook https://www.facebook.com/OfficialAirC... Twitter https://twitter.com/AirClique Instagram https://www.instagram.com/teamairclique Email: [email protected]
Views: 4260 The Einstein Code
What is Hashing? Hash Functions Explained Simply
 
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What is hashing? In this video we explain how hash functions work in an easy to digest way. Hashing is the process of converting an input of any length into a fixed size string of text, using a mathematical function. 👩‍🎓👨‍🎓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. 🗞Read our latest news on the Lisk Blog: https://blog.lisk.io/ 💼 Check our current job openings! https://angel.co/lisk 👚👕 Lisk t-shirts now available: https://merch.lisk.io/ 👩‍🚀👨‍🚀 Meet the team: https://lisk.io/team 🔒 Store your LSK in our official wallet: https://lisk.io/hub/index.html#/ 🔎 View our blockchain explorer: https://explorer.lisk.io/ 🎥 For media inquiries, please email us at press [at] lisk [dot] io. 👫Join our community channels: Reddit: http://reddit.com/r/lisk Twitter: http://twitter.com/liskhq Telegram: https://t.me/Lisk_HQ Lisk.chat: https://lisk.chat/ Instagram: http://instagram.com/liskhq Facebook: http://facebook.com/liskhq LinkedIn: https://www.linkedin.com/company/lisk/ 👨‍💻👩‍💻 For developers: GitHub: https://github.com/LiskHQ Gitter: https://gitter.im/LiskHQ/lisk Documentation: https://lisk.io/documentation
Views: 4544 Lisk
Encryption in JavaScript | JavaScript Tutorials | Web Development Tutorials
 
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In this video lesson, you will learn to develop Encryption in JavaScript using CryptoJS library. Donate & Support: https://www.verkkonet.com/downloads/donate.php?id=j32 To download the source code of Encryption in JavaScript: https://verkkonet.com/downloads/index.php?id=j32
Views: 213 VerkkoNet
Javascript Password Encryption.wmv
 
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More info on this video : - http://hackwithmak.blogspot.in/2012/02/protect-your-users-passwords-without.html Download this Video :- http://www.mediafire.com/download.php?wdslotr96j6f5an
Views: 5243 TEAMAS5ASSIN
Blockchain tutorial 3: Hash
 
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This is part 3 of the Blockchain tutorial explaining what hashes are. In this video series different topics will be explained which will help you to understand blockchain. Bitcoin released as open source software in 2009 is a cryptocurrency invented by Satoshi Nakamoto (unidentified person or group of persons). After the introduction of Bitcoin many Bitcoin alternatives were created. These alternate cryptocurrencies are called Altcoins (Litecoin, Dodgecoin etc). Bitcoin's underlying technology is called Blockchain. The Blockchain is a distributed decentralized incorruptible database (ledger) that records blocks of digital information. Each block contains a timestamp and a link to a previous block. Soon people realises that there many other use cases where the Blockchain technology can be applied and not just as a cryptocurrency application. New Blockchain platforms were created based on the Blockchain technology, one of which is called Ethereum. Ethereum focuses on running programming code, called smart contracts, on any decentralized application. Using the new Blockchain platforms, Blockchain technology can be used in supply chain management, healthcare, real estate, identity management, voting, internet of things, etcetera, just to name a few. Today there is a growing interest in Blockchain not only in the financial sector but also in other sectors. Explaining how Blockchain works is not easy and for many the Blockchain technology remains an elusive concept. This video series tries to explain Blockchain to a large audience but from the bottom up. Keywords often used in Blockchain conversation will be explained. Each Blockchain video is short and to the point. It is recommended to watch each video sequentially as I may refer to certain Blockchain topics explained earlier. Check out all my other Blockchain tutorial videos https://goo.gl/aMTFHU Subscribe to my YouTube channel https://goo.gl/61NFzK The presentation used in this video tutorial can be found at: http://www.mobilefish.com/developer/blockchain/blockchain_quickguide_tutorial.html #mobilefish #blockchain #bitcoin #cryptocurrency #ethereum
Views: 12984 Mobilefish.com
10/13: Encrypt Passwords With bcryptjs and Make a Login Route
 
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1) npm install bcryptjs 2) use the hash() function to encrypt passwords 3) use the compare() function to check passwords upon login Start from scratch and finish with a Twitter clone! Check out the full series: https://www.youtube.com/playlist?list=PLZrs7Z81U28WYp_uuTe9bcCd0ohBwKrwy
Views: 5339 DaveDevTV
Argon2 Password Hashing Node.js | BCrypt Alternative
 
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Instead of using BCrypt, you can use Argon2 to hash passwords. Code: https://github.com/benawad/graphql-typescript-stripe-example/tree/argon2 ---- If you like cooking, checkout my side project: https://www.mysaffronapp.com/ ---- Join the Discord: https://discord.gg/Vehs99V ---- Patreon: https://www.patreon.com/benawad ---- Follow Me Online Here: Medium: https://medium.com/@benawad Twitter: https://twitter.com/benawad97 GitHub: https://github.com/benawad Facebook: https://www.facebook.com/benawad97/ LinkedIn: https://www.linkedin.com/in/benawad/ Instagram: http://instagram.com/benawad97
Views: 754 Ben Awad
How secure is 256 bit security?
 
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Supplement to the cryptocurrency video: How hard is it to find a 256-bit hash just by guessing and checking? What kind of computer would that take? Cryptocurrency video: https://youtu.be/bBC-nXj3Ng4 Thread for Q&A questions: http://3b1b.co/questions Several people have commented about how 2^256 would be the maximum number of attempts, not the average. This depends on the thing being attempted. If it's guessing a private key, you are correct, but for something like guessing which input to a hash function gives a desired output (as in bitcoin mining, for example), which is the kind of thing I had in mind here, 2^256 would indeed be the average number of attempts needed, at least for a true cryptographic hash function. Think of rolling a die until you get a 6, how many rolls do you need to make, on average? 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: 834278 3Blue1Brown
Encryption vs Cryptographic Hash - Friday Minis 36
 
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How is data stored in high-security applications? What are the different techniques available and under what situations are they used? We explore two such examples in today's episode of Friday Minis! = Intro Track Adapted From = Blown Away by Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/ ISRC: USUAN120010
Views: 4212 0612 TV w/ NERDfirst
Creating a blockchain with Javascript (Blockchain, part 1)
 
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Learn how to write your own Blockchain with JavaScript. In this video I'll show you what is behind a blockchain by using simple code. It's not a complete implementation, but enough to understand how blockchains work and how they guarantee that blocks can never be changed. After creating our blockchain we'll try and tamper with it. This will demonstrate a blockchains ability to detect fraud. Next video (implementing proof-of-work): https://youtu.be/HneatE69814 💰 Want to buy Bitcoin or Ethereum? Buy for $100 and get $10 free (through my affiliate link): https://www.coinbase.com/join/59284524822a3d0b19e11134 ► Source code Available on GitHub: https://github.com/SavjeeTutorials/SavjeeCoin ► About me 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be ✉️ Subscribe to newsletter: https://goo.gl/nueDfz 👍🏻 Like my Facebook page: https://www.facebook.com/savjee
Encrypt Decrypt Hashing - PHP & MYSQL - Protect your data in your database
 
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Databases are becoming vulnerable to hacking and other means of attack. $10 Free credit for hosting on DigitalOcean https://m.do.co/c/7e7436ae5d07 Please protect the sensitive data in your system. I will show you a couple simple methods to start protecting your database. Update: This method is now out of date, please search for newer solutions.
Views: 81627 Devvid
Importance Of Developers Salting User Passwords
 
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Racker Bret McGowen discusses the importance of developers salting their user's passwords to help increase security for their app.
Views: 33193 Rackspace
Asymmetric encryption - Simply explained
 
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How does public-key cryptography work? What is a private key and a public key? Why is asymmetric encryption different from symmetric encryption? I'll explain all of these in plain English! 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be 👍🏻 Like my Facebook page: https://www.facebook.com/savjee
Episode #063 - Client Side Encryption
 
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Add an extra level of security to your application with client side encryption. Even over an SSL connection, there are attacks which could expose your users' sensitive information. Using JSEncrypt, learn how to encrypt on the client side and decrypt on the server side. https://www.driftingruby.com/episodes/client-side-encryption
Views: 2170 Drifting Ruby
web crypto api  ecdsa generate key sign verify message
 
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Reference : https://8gwifi.org/docs/window-crypto-ecdsa.jsp The Web crypto api ECDSA algorithm identifier is used to perform signing and verification using the ECDSA algorithm specified in RFC6090 and using the SHA hash functions and elliptic curves defined in this specification. web crypto api example javascript web crypto api example web crypto api digital signature html5 web cryptography api
Views: 19 Zariga Tongy
How to Encrypt & Decrypt Form Data using PHP Ajax - 1
 
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How to Fetch or Select Encrypted Data from Mysql table and Decrypt Encrypted Data and Display under Jquery Datatables Plugin by using PHP with Ajax. In this tutorial we have discuss How to Encrypt and Decrypt Data in PHP. Here we have discuss two way encryption and decryption string using PHP AES-256-CBC. Part 2 - https://youtu.be/hg-4KEKb-Yo
Views: 6320 Webslesson
Blockchain Basics Explained - Hashes with Mining and Merkle trees
 
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A brief and simple introduction to the hash function and how blockchain solutions use it for proof of work (mining) and data integrity (Merkle Trees).
Views: 204499 Chainthat
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: 94360 ProgrammingKnowledge
Bcrypt & Password Security - An Introduction
 
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A conceptual introduction to bcrypt and why it's useful in the context of user password security. MakerSquare | http://mks.io/learntocode MakerSquare is a three-month full-time career accelerator for software engineering. By teaching computer science fundamentals and modern web languages like JavaScript, we prepare students to join top flight engineering teams.
Views: 23008 Hack Reactor
DEF CON 25 Crypto and Privacy Village - David Wong - SHA 3 vs The World
 
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Since Keccak has been selected as the winner of the SHA-3 competition in 2012, a myriad of different hash functions have been trending. From BLAKE2 to KangarooTwelve we'll cover what hash functions are out there, what is being used, and what you should use. Extending hash functions, we’ll also discover STROBE, a symmetric protocol framework derived from SHA-3.
Views: 2313 DEFCONConference
Differences Between Encryption, Encoding and Hashing
 
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Differences Between Encryption, Encoding and Hashing
Views: 5147 LearnEveryone
Recover RSA private key from public keys - rhme2 Key Server (crypto 200)
 
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Using the greatest common divisor (GCD) to factorize the public modulo into the secret primes, so we can forge a RSA signature. Source for the rhme2 challenges: https://github.com/Riscure/Rhme-2016 -------------------------------------- Twitter: https://twitter.com/LiveOverflow Website: http://liveoverflow.com/ Subreddit: https://www.reddit.com/r/LiveOverflow/
Views: 34253 LiveOverflow
PHP Tutorial: Password Encryption with MD5, SHA1, and Crypt -HD-
 
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In this tutorial, you will learn how to encrypt passwords and other data by using the md5, sha1, and crypt functions. Be sure to SUBSCRIBE because there will be a new tutorial every week. Follow me on Twitter @RiverCityGraphx Like us on on facebook: http://on.fb.me/i8UQpt Suggest tutorials at http://www.rivercitygraphix.com For project files, help forums, and more check out the website at http://www.rivercitygraphix.com For business related inquires contact us at [email protected]
Views: 40333 RiverCityGraphix
Compare Hash Password W/ Node.js & BCrypt
 
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Comparing hash passwords in Node.js // In this video we will be continuing off from the last video. We will modify our login strategy to make sure it knows how to compare a string to a hash string. BCRYPT DOCUMENTATION https://www.npmjs.com/package/bcrypt PREVIOUS VIDEO https://youtu.be/lWDws1j8fo4 GITHUB LINK https://github.com/airclique/project-1 ::VIDEO TIMESTAMP:: 1:00 Create compare password logic 4:42 Inject compare password method to PassportJS 7:41 Testing new feature! FIND ME HERE: Website http://www.airclique.com Facebook https://www.facebook.com/OfficialAirC... Twitter https://twitter.com/AirClique Instagram https://www.instagram.com/teamairclique Email: [email protected]
Views: 1789 The Einstein Code
PHP, Javascript, Ajax | Hash Table Generator - Part 1
 
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Sorry about the video quality and the lull of my voice...I'm a little tired and sick so it's kind of not exciting. The rest of the videos will be uploaded. Unfortunately I have no website to upload source to because I am lazy. I will get on that if I get a bigger fan base! Thanks. Comment, Like, Subscripe.
Views: 1264 IntelProductionsx
08 - Bcrypt password hashing
 
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Adding bcrypt password hashing for authentication. Source code: https://github.com/code-tutorials/golang-webapp/releases/tag/Part08 Let me know in the comments if you have any questions or suggestions. Davy Wybiral https://twitter.com/davywtf https://plus.google.com/+DavyWybiral7
Views: 1028 DavyBot
IOTA tutorial 15: BundleHash
 
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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 15 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. How the bundleHash is created, see: https://github.com/iotaledger/iota.lib.js/blob/v0.4.7/lib/crypto/bundle/bundle.js Bundle.prototype.finalize = function() To create the bundleHash the following transactionObject values are used: address, value, obsoleteTag, currentIndex, lastIndex and timestamp. See prepareTransfers demo (step 6): https://www.mobilefish.com/download/iota/preparetransfers_demo.txt Note: The currentIndex and lastIndex are array positions, that is why you will not see these fields in step 6. For each transactionObject in the bundle, calculate: * valueTrits = convertToTrits(value). The length is always 81 trits (padded with 0). Note: The number of IOTAs created is: 2,779,530,283,277,761 This number converted to trits: 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1 That is 33 trits which means valueTrits can hold more than enough trits. * timestampTrits = convertToTrits(timestamp). This is the number of seconds elapsed since January 1, 1970 00:00:00 UTC. The length is always 27 trits (padded with 0). Note: 27 trits (1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1) converted to a decimal value is: 3,812,798,742,493 * currentIndex = bundle array index currentIndexTrits = convertToTrits(currentIndex). The length is always 27 trits (padded with 0). * lastIndex = bundle.length - 1 lastIndexTrits = convertToTrits(lastIndex). The length is always 27 trits (padded with 0). * bundleEssence = convertToTrits(address + convertToTrytes(valueTrits) + obsoleteTag + convertToTrytes(timestampTrits) + convertToTrytes(currentIndexTrits) + convertToTrytes(lastIndexTrits)) The bundleEssence length is always 81 + 27 + 27 + 9 + 9 + 9 = 162 trytes = 162 x 3 = 486 trits Use the cryptographic sponge construction to absorb the bundleEssences and squeeze the hash. Convert the hash to trytes: bundleHash = convertToTrytes(hash) The bundleHash contains 243 / 3 = 81 trytes. For example: bundleHash = NBBKCKPFECRKCDIBKSTHZYZKSXFEUPTIJRK9FECFKPTTSWTLUWGIFS9AHSDT9LASABRD9KDVFJ9GT9CKA Add the bundleHash for each transactionObject in the bundle (fieldname is bundle). The bundleHash identifies which transactions belongs to the same bundle. See prepareTransfers demo (step 7): https://www.mobilefish.com/download/iota/preparetransfers_demo.txt After the bundleHash is added in the transactionObjects, the normalizedBundleHash is calculated. The normalizedBundleHash is explained in IOTA tutorial 16. The normalizedBundleHash is used to create or validate a signature. If the normalizedBundleHash has tryte value M: * Update the obsoleteTag in the FIRST transactionObject in the bundle by converting the obsoleteTag to trits, add value 1 and convert the result back to trytes. * After the obsoleteTag is updated: - Calculate the bundleEssences. - Apply the cryptographic sponge construction. - Calculate the bundleHash. - Calculate the normalizedBundleHash. * Repeat these steps until the normalizedBundleHash has no tryte value M. To check for tryte value M in the normalizedBundleHash, see: https://github.com/iotaledger/iota.lib.js/blob/v0.4.7/lib/crypto/bundle/bundle.js Bundle.prototype.finalize = function() See example where the obsoleteTag was updated multiple times. https://www.mobilefish.com/download/iota/data_transaction_example2.txt Remarks: The normalizedBundleHash is not stored in the bundle but it is calculated using the bundleHash which is stored in the bundle. The obsoleteTag plays an important role in the creation of the bundleHash. https://github.com/iotaledger/iota.lib.js/blob/v0.4.7/lib/crypto/bundle/bundle.js Bundle.prototype.finalize = function() 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: 2515 Mobilefish.com
43: Hashing and de-hashing data using PHP | PHP tutorial | Learn PHP programming
 
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Hashing and de-hashing data using PHP | PHP tutorial. In this lesson you will learn about database data security, and how to hash and dehash data using PHP. In PHP we have a hash function which uses bcrypt, in order to protect data provided by our users. Login system tutorial (link starts at hashing part): https://youtu.be/xb8aad4MRx8?t=59m42s ➤ GET ACCESS TO MY LESSON MATERIAL HERE! First of all, thank you for all the support you have given me! I am really glad to have such an awesome community on my channel. It motivates me to continue creating and uploading content! So thank you! I am now using Patreon to share improved and updated lesson material, and for a small fee you can access all the material. I have worked hard, and done my best to help you understand what I teach. I hope you will find it helpful :) Material for this lesson: https://www.patreon.com/posts/php-43-download-15654480
Views: 29318 mmtuts
Secure Hashing Algorithm or SHA 2 / Algorithm best Encryption Algorithm best hashing Algorithm
 
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CLICK TO GET COMPLETE COURSE :- https://gradesetter.com/ Secure Hashing Algorithm or SHA 2 algorithm best encryption algorithm best hashing algorithm cryptographic hash function database hashing
What is the merkle tree in Bitcoin?
 
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Explanation of cryptographic hash: https://youtu.be/IVqD-_QskW0?t=1m13s 13uJjYF12aRVdwaiTmALx5XDfguQ9MnYtK
Views: 17714 Keifer Kif
The Power of Theory in the Practice of Hashing with Focus on Similarity Estimation
 
01:07:17
A Google TechTalk, 3/8/18, presented by Mikkel Thorup (University of Copenhagen) Talks from visiting speakers on Algorithms, Theory, and Optimization
Views: 1175 GoogleTechTalks
NodeJS Crypto Create Random Number
 
03:14
Learn how to Create Random Values using Crypto Module in NodeJS.
Views: 1546 DevNami
Node.js & Express From Scratch [Part 10] - User Login
 
21:57
In this video we will implement Passport.js and a local strategy to log users in with a username and password. We will also be using bcrypt for password hashing. CODE: Full code for this series https://github.com/bradtraversy/nodekb COURSE: Full course this project is based on http://www.traversymedia.com/course/p... SUPPORT: We spend massive amounts of time creating these free videos, please donate to show your support: http://www.paypal.me/traversymedia http://www.patreon.com/traversymedia FOLLOW TRAVERSY MEDIA: http://www.facebook.com/traversymedia http://www.twitter.com/traversymedia http://www.linkedin.com/bradtraversy
Views: 30175 Traversy Media
Password Hashing (Password Encryption) - How to do it right! (Hebrew)
 
01:07:43
הצפנת סיסמאות משתמשים באמצעות Hashing - מהוא Password Hashing - שיטות לפיצוח Hash: - Dictionary Attacks - Brute Force Attacks - Lookup Tables - Reverse Lookup Tables - Rainbow Tables - כיצד מונעים פיצוח של Hash - אלגורתמים להצפנה (Cryptography Functions) - הוספת SALT - שימוש ב SALT אקראי (CSPRNG) - Key stretching - Slow Start - שיטות נוספות למניעת פריצת Hash - דוגמת קוד מפורטת המציגה את השיטה הנכונה לביצוע הצפנת הסיסמאות
Views: 1276 Ran Shahak
SHA1 length extension attack on the Secure Filesystem - rhme2 Secure Filesystem (crypto 100)
 
06:58
The first challenge I solved for the embedded hardware CTF by riscure. It implements a Secure Filesystem which prevents you from readeing files without knowing the correct token for a file. Load the challenge on your own board: https://github.com/Riscure/Rhme-2016 -------------------------------------- Twitter: https://twitter.com/LiveOverflow Website: http://liveoverflow.com/ Subreddit: https://www.reddit.com/r/LiveOverflow/
Views: 11321 LiveOverflow
MD5 length extension and Blind SQL Injection - BruCON CTF part 3
 
10:30
Last video from the BRUCON CTF 2016. Covering "Breaking the crypto", "Log Analysis BSQLi" and "Crypto". Topics covered: hash length extension attack, hashpump, blind sql injection, webserver access.log Filippo: https://twitter.com/FiloSottile cryptography.training: https://github.com/cryptography-training Join the discussion: https://www.reddit.com/r/LiveOverflow/comments/5ebjjr/md5_length_extension_and_blind_sql_injection/
Views: 11880 LiveOverflow
Python Encryption Tutorial with PyCrypto
 
21:05
Sentdex.com Facebook.com/sentdex Twitter.com/sentdex How to use python to encrypt sensitive information, and later decrypt it, using PyCrypto! PyCrypto: https://www.dlitz.net/software/pycrypto/ The Code: http://sentdex.com/sentiment-analysisbig-data-and-python-tutorials/encryption-and-decryption-in-python-code-example-with-explanation/
Views: 79203 sentdex

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