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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
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: 440768 itfreetraining
Symmetric and Asymmetric Encryption Overview (Private Public Keys)
 
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http://zerotoprotraining.com This video provides and overview of Symmetric and Asymmetric Encryptions including the concepts of public and private keys (PKI)
Views: 104617 HandsonERP
Symmetric vs. Asymmetric Encryption - CompTIA Security+ SY0-401: 6.1
 
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Security+ Training Course Index: http://professormesser.link/sy0401 Professor Messer’s Course Notes: http://professormesser.link/sy0401cn Frequently Asked Questions: http://professormesser.link/faq - - - - - Our encryption methods will generally use either symmetric encryption or asymmetric encryption, and sometimes both! In this video, you’ll learn the advantages and disadvantages when using symmetric or asymmetric encryption types. - - - - - Download entire video course: http://professormesser.link/401adyt Get the course on MP3 audio: http://professormesser.link/401vdyt Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 61969 Professor Messer
Public Key Cryptography - Computerphile
 
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Spies used to meet in the park to exchange code words, now things have moved on - Robert Miles explains the principle of Public/Private Key Cryptography note1: Yes, it should have been 'Obi Wan' not 'Obi One' :) note2: The string of 'garbage' text in the two examples should have been different to illustrate more clearly that there are two different systems in use. http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: http://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels
Views: 405702 Computerphile
Symmetric vs Asymmetric ( public key )  Cryptography
 
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Lesson 2 of cryptography series (to see all video check cryptography playlist - link given below). cryptography playlist : https://www.youtube.com/watch?v=_Yw7QWbk9Vs&list=PLf8bMP4RWebLVGpUnhji9Olkj1jdXfzFd Subscribe to our new youtube channel also : https://www.youtube.com/channel/UCNx1Gkyy9LfOxDMbcOKuV4g symmetric vs asymmetric ( public key ) cryptography symmetric key vs assymetric key encryption advantages of symmetric key cryptography advantages of assymetric cryptography concept of digital signatures safe and secure communication between systems encrypted communication between systems like us on facebook : https://www.facebook.com/guidetohacking/ #symmetric #asymmetric #public #key #cryptography #encryption
Views: 41617 Hacks And Security
Cryptography Explained: Public-Key vs Symmetric Cryptography
 
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Our "Cryptography Explained" video breaks down how cryptography works in blockchain and highlight the differences between public-key cryptography vs. symmetric cryptography. Cryptography is the method of disguising and revealing information, through complex mathematics. Any piece of information can be encrypted, making it impossible to read, except for by the intended recipient. 👩‍🎓👨‍🎓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://github.com/LiskHQ/lisk-hub/releases/latest 🔎 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: 3130 Lisk
Public Key Encryption (Asymmetric Key Encryption)
 
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In public key encryption, two different keys are used to encrypt and decrypt data.One is the public key and other is the private key. These two keys are mathematically related. They come as a pairs. The public key encryption is also called asymmetric key encryption because two different keys are used. Public key algorithm is used for different purpose from private key algorithm. It is used for verification and authentication. In this video, I will use an example to demonstrate how to use public key. 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 leave comments, questions and please subscribe!
Views: 26143 Sunny Classroom
Difference between Asymmetric Key and Symmetric Key Cryptography
 
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Difference between Asymmetric Key and Symmetric Key Cryptography Keywords: Asymmetric Key Cryptography Symmetric Key Cryptography Network Security Notes
Asymmetric Encryption and Decryption using C#
 
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This tutorial explains how to write a program in C# for Asymmetric Encryption and Decryption, particularly using BouncyCastle API. To add BouncyCastle API, check out our previous video at: https://www.youtube.com/watch?v=4iPzIEXC7a8
Views: 1902 PKIIndia
Cryptography: The Math of the Public Private Key of RSA
 
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Thanks to all of you who support me on Patreon. You da real mvps! $1 per month helps!! :) https://www.patreon.com/patrickjmt !! Part 1: https://youtu.be/PkpFBK3wGJc Please consider being a supporter on Patreon! https://www.patreon.com/patrickjmt Twitter: @Patrick_JMT In this video I show mathematically for RSA encryption works by going through an example of sending an encrypted message! If you are interested in seeing how Euclid's algorithm would work, check out this video by Emily Jane: https://www.youtube.com/watch?v=fz1vxq5ts5I A big thanks to the 'Making & Science team at Google' for sponsoring this video! Please like and share using hashtag #sciencegoals
Views: 37039 patrickJMT
Private and Public Key Encryption
 
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Asymmetric Encryption A common craft video I made for my ITGS lesson.
Views: 78281 Nihal Acar
How asymmetric (public key) encryption works
 
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Easy explanation of "public key encryption". Instead of the usual terms of "public key" and "private key" this tutorial uses "lock" and "key". ================================================== If you want to start protecting you email: get free Privacy Everywhere Beta, http://www.privacyeverywhere.net/
Views: 200758 Veet Vivarto
Symmetric Encryption & Caesar Cipher: Cryptography and Network Security - Unacademy GATE(CSE)
 
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This lesson explains the Symmetric Encryption & Caesar Cipher, under the course, "Cryptography and Network Security for GATE". The lesson explains the following subtopics: Symmetric Encryption Substitution Techniques Transposition Techniques Caesar Cipher Some important terminology and concepts are also illustrated, for the better understanding of the subject. For the entire course: https://goo.gl/aTMBNZ For more lessons by Ansha Pk: https://goo.gl/2DX9Wn Must watch for all the GATE/ESE/PSU Exams. Download the Unacademy Learning App from the Google Play Store here:- https://goo.gl/02OhYI Download the Unacademy Educator app from the Google Play Store here: https://goo.gl/H4LGHE Do Subscribe and be a part of the community for more such lessons here: https://goo.gl/UGFo7b Visit Our Facebook Group on GATE here: https://goo.gl/cPj5sb Symmetric Encryption & Caesar Cipher: Cryptography and Network Security - Unacademy GATE(CSE)
Symmetric and Asymmetric Key Cryptography
 
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Symmetric and Asymmetric Key Cryptography Watch more Videos at https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Arnab Chakraborty, Tutorials Point India Private Limited
Symmetric vs Asymmetric Encryption #iGCSE #CompSci
 
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This video is about symmetric vs asymmetric encryption
Views: 407 Ian Simpson
Key Exchange Problems - Computerphile
 
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Diffie Hellman has a flaw. Dr Mike Pound explains how a man in the middle could be a big problem, unless we factor it in... Public Key Cryptography: https://youtu.be/GSIDS_lvRv4 Elliptic Curve Cryptography: Coming Soon! https://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com
Views: 109632 Computerphile
Private Key Encryption (Symmetric Key Encryption)
 
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In private key encryption, data is encrypted using a single same key that only the sender and the receiver know. That is why private key encryption is also called symmetric key encryption because the same key is used during both encryption and decryption of the transmitted data. In this video, I will also use an example to demonstrate the process of using private key encryption. Two different methods -stream encryption and block encryption- of private key algorithm are also depicted with animation. 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 leave comments, questions and please subscribe!
Views: 16773 Sunny Classroom
Symmetric and Asymmetric Encryption - CompTIA Security+ SY0-501 - 6.1
 
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Security+ Training Course Index: http://professormesser.link/sy0501 Professor Messer’s Course Notes: http://professormesser.link/501cn Frequently Asked Questions: http://professormesser.link/faq - - - - - If you’re planning to implement cryptography, then you’ll probably be using either symmetric encryption or asymmetric encryption. In this video, you’ll learn about both of these valuable encryption mechanisms. - - - - - Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 13393 Professor Messer
symmetric key cryptography
 
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https://8gwifi.org/CipherFunctions.jsp Reference book: http://leanpub.com/crypto Cryptographic Algorithms generally fall into one of two different categories, or are a combination of both. Symmetric Fast Only provide confidentiality Examples: DES, AES, Blowfish, RC4, RC5 Asymmetric Large mathematical operations make it slower than symmetric algorithms No need for out of band key distribution (public keys are public!) Scales better since only a single key pair needed per individual Can provide authentication and nonrepudiation Examples: RSA, El Gamal, ECC, Diffie-Hellman problem with symmetric key cryptography DES (Data Encryption Standard) 64 bit key that is effectively 56 bits in strength Actual algorithm is called DEA (Data Encryption Algorithm) DES Modes Electronic Code Book Cipher Block Chaining (most commonly used for general purpose encryption) Cipher Feedback Output Feedback Counter Mode (used in IPSec) 3DES 112-bit effective key length Uses either 2 or 3 different smaller keys in one of several modes Modes EEE2/3 EDE2/3 AES NIST replaced DES in 1997 with this Uses the Rijndael algorithm Supports key/block sizes of 128, 192, and 256 bits Uses 10/12/14 rounds as block size increases IDEA (International Data Encryption Algorithm) Operates on 64 bit blocks in 8 rounds with 128 bit key Considered stronger than DES and is used in PGP Blowfish 64 bit block cipher with up to 448 bit key and 16 rounds Designed by Bruce Schneier RC4 Stream cipher with variable key size created by Ron Rivest RC5 Another Rivest cipher Block cipher with 32/64/128 bit blocks and keys up to 2048 bits RC6 Beefier version of RC5 submitted as AES candidate CAST 64 bit block cipher with keys between 40-128 bits with 12-16 rounds depending on key length CAST-256 used 128-bit blocks and keys from 128-256 bits using 48 rounds SAFER (Secure and Fast Encryption Routine) Set of patent-free algorithms in 64 and 128 bit block variants Variation used in Bluetooth Twofish Adapted version of Blowfish with 128 bit blocks, 128-256 bit keys and 16 rounds AES Finalist Kryptografie mit symmetrischem Schlüssel symmetric key cryptography symmetric key cryptography tutorial symmetric key cryptography example symmetric key cryptography vs asymmetric key cryptography symmetric and asymmetric key cryptography symmetric key cryptography Kryptografie mit symmetrischem Schlüssel Kryptographie mit symmetrischem Schlüssel Kryptographie mit symmetrischem Schlüssel Kryptografie mit symmetrischem Schlüssel und asymmetrische Schlüsselkryptographie symmetrische und asymmetrische Schlüsselkryptographie Kryptografie mit symmetrischem Schlüssel
Views: 39234 Zariga Tongy
Symmetric Key Cryptography VS Asymmetric Key Cryptography | Private vs Public Key Cryptography
 
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Understand the working of Symmetric Key Cryptography and Asymmetric Key Cryptography in detail with working and difference between the 2 types. Symmetric Key Cryptography(Private Key Cryptography) - 1. In symmetric-key cryptography, the same key is used by the sender (for encryption) and the receiver(for decryption). 2. The key is shared. 3. The key is Secret and kept Private between the Sender & Receiver 4. For N users in a network the number of keys required is - N(N-1)/2 Asymmetric Key Cryptography(Public Key Cryptography) 1. In asymmetric-key cryptography, 2 different keys are used. 1 for Encryption & 1 for Decryption. 2. Every communicating party needs just a key pair. 3. One of the two keys is called as Public Key and the other is the Private Key. 4. Private key remains as a secret. Public key is for the general public. 5. Only the corresponding public private key pair and encrypt and decrypt messages and no other key can be used. 6. For N users in a network the number of keys required is - N*2. Complete Network Security / Information Security Playlist - https://www.youtube.com/watch?v=IkfggBVUJxY&list=PLIY8eNdw5tW_7-QrsY_n9nC0Xfhs1tLEK Download my FREE Network Security Android App - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials Simple Snippets Official Website - https://simplesnippets.tech/ Simple Snippets on Facebook - https://www.facebook.com/simplesnippets/ Simple Snippets on Instagram - https://www.instagram.com/simplesnippets/ Simple Snippets on Twitter - https://twitter.com/simplesnippet Simple Snippets Google Plus Page - https://plus.google.com/+SimpleSnippets Simple Snippets email ID - [email protected] For More Technology News, Latest Updates and Blog articles visit our Official Website - https://simplesnippets.tech/
Views: 405 Simple Snippets
JWT using RSA Public/Private Key Pairs
 
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A little NodeJS demo of making and verifing JavaScript Web Tokens (JWT) using RSA Public/Private Key Pairs Table of Contents: 00:00 - Introduction 00:44 - 1. Get a RSA public/private PEM pair 01:41 - NPM Package for JWT 02:05 - Why this demo? 02:21 - Node - Read Keys off Disk 02:51 - Node - Specify the right algorithm 04:34 - Node - suggested option elements 04:41 - Issuer 04:48 - Subject 04:54 - Audiance 05:04 - Expires 05:40 - Signing Options 05:54 - Sign your payload with options 06:11 - Verify Options 06:37 - Node - Verify Token 06:53 - Node - Decode 07:02 - Demo 08:04 - Marker 22
Views: 6707 Stuart Williams
The concept of symmetric and asymmetric cryptography
 
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In this Video, Dr. Seema Batra, Assistant professor, Biyani Groups of Colleges, Jaipur, explains about the concept of symmetric and asymmetric cryptography. http://www.gurukpo.com/ http://www.biyanicolleges.org/
Views: 12019 Guru Kpo
Symmetric vs Asymmetric Encryption - Part 2
 
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In this video I will talk about Symmetric and Asymmetric Encryption techniques. #Symmetric #Asymmetric #Encryption What is SSL/TLS - Part 1: https://youtu.be/_YBBk_rwmOw Become an expert at using JIRA 7 through this one-stop guide! by reading my book "Mastering Jira 7 - Second Edition" This book provides a comprehensive explanation covering all three components of Jira 7, such as Jira Software, Jira Core, and Jira Service Desk. It shows you how to master the key functionalities of JIRA and its customizations and useful add-ons, and is packed with real-world examples and use cases. http://www.RaviSagar.in/MasteringJira7 https://www.linkedin.com/in/ravisagar/
Views: 52 Ravi Sagar
Key Exchange
 
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This clip from the 2008 Royal Institution Christmas Lectures shows a simple demonstration of how two people can agree on a secret key, even though all of their communications are carried out in public. In the electronic world, secret key exchange allows computers to communicate securely, and is used, for example, when you give your credit card information to an on-line shop. You can watch the 2008 Royal Institution Christmas Lectures in full at: http://research.microsoft.com/~cmbishop or by visiting the Royal Institution web site. There is a dedicated web site to accompany the 2008 Christmas Lectures, with ten interactive games as well as downloadable PDF instructions for experiments which can be conducted at home or at school: http://www.rigb.org/christmaslectures08
Views: 138272 ProfChrisBishop
Public Keys Part 2 - RSA Encryption and Decryptions
 
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Asymmetric Part 2 - RSA includes tutorial on how to encrypt and decrypt as well as calculating the keys and euclidean algorithm.
Views: 58430 Daniel Rees
Public Keys Part 1 - Public Key Introduction and El Gamal
 
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Asymmetric Part 1 - Introduction to Public Key and El Gamal's Key Distributions
Views: 11653 Daniel Rees
How does public key cryptography work – Gary explains
 
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How keys are distributed is vital to any encryption system. Find out how to do it with the Diffie–Hellman key exchange and using public-key cryptography. Find out more: https://goo.gl/qI6jxZ Download the AndroidAuthority App: https://play.google.com/store/apps/details?id=com.androidauthority.app Subscribe to our YouTube channel: http://www.youtube.com/subscription_center?add_user=androidauthority ---------------------------------------------------- Stay connected to Android Authority: - http://www.androidauthority.com - http://google.com/+androidauthority - http://facebook.com/androidauthority/ - http://twitter.com/androidauth/ - http://instagram.com/androidauthority/ Follow the Team: Josh Vergara: https://plus.google.com/+JoshuaVergara Joe Hindy: https://plus.google.com/+JosephHindy Lanh Nguyen: https://plus.google.com/+LanhNguyenFilms Jayce Broda: https://plus.google.com/+JayceBroda Gary Sims: https://plus.google.com/+GarySims Kris Carlon: http://plus.google.com/+KrisCarlon Nirave Gondhia: http://plus.google.com/+NiraveG John Velasco: http://plus.google.com/+JohnVelasco Bailey Stein: http://plus.google.com/+BaileyStein1
Views: 38844 Android Authority
Intro to Asymmetric Key Cryptography
 
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This video is part of a larger online course, "From Barter to Bitcoin: Society, Technology and the Future of Money" run by Prof. Bill Maurer and Prof. Donald J. Patterson In addition to the video on YouTube there is a variety of other content available to students enrolled in the class. "In 2008, a person calling himself or herself or themselves Satoshi Nakamoto released a paper suggesting a system for an anonymous, peer-to-peer alternative money. Bitcoin was born. Although not the first digital currency ever proposed, nor the first challenger to fiat money, bitcoin is the first to have captured the broad imagination of speculators, coders, regulators, criminals and the mass media. This course puts Bitcoin in context: how do we understand money as a social, political and technological phenomenon? From discussions of ancient transactions to the rise of state-issued currencies, we will explore the social and technical aspects of bitcoin, its predecessors and potential successors, and how its features echo aspects of many different historical transaction systems. No prior knowledge of economics or computing is required. There is little academic writing on bitcoin. And this may be the first truly academic class on the topic. We want to put bitcoin in a wider perspective, to reflect on what it means for society, politics and economics, as well as how it helps us think about money both a social and a technical phenomenon. This class is not an advanced seminar on bitcoin--we will not be delving deeply into the inner workings of the system, but instead providing a bird's-eye overview with enough technical detail for you to be able to put media stories, hype and hope around bitcoin in perspective. Similarly, this is not a class in monetary economics--we won't go too deeply into monetary theory or policy, the money supply, or inflation. Instead the class invites you to think more deeply about one of the oldest systems of technology on the planet, and most ubiquitous: money, whether coin, cash, credit card or cryptocurrency, we humans have been making money for most of the past 10,000 years. How we do so in the future is a question bitcoin just maybe helps us answer."
Views: 40185 djp3
Learn Public Key Cryptography in just 18 Minutes - Cryptography Tutorial
 
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+++See my latest video: Internet Security or Die+++ https://youtu.be/CzB5n6_pBfk Learn Public Key Cryptography in just 18 Minutes - Cryptography Tutorial In this Cryptography Tutorial, I teach you Public Key cryptography basics. Specifically I’m going to explain to you how the cryptography works, that allows you to do online shopping. We are so used to online shopping, a.k.a. e-commerce, that we take it for granted. But e-commerce would not be possible at all without public key cryptography. Not only will I explained to you the details of public-key cryptography and how that makes e-commerce possible, but I’m going to explain it in 15 minutes, and explain it without math, by using the Blackbox model. IMHO, cryptography basics should not include math. Cryptography explained with math simply muddies the waters to those without extensive math background. Let’s start by taking a brief look at Classic cryptography, which is been around for thousands of years. Classic cryptography is also called secret key cryptography or Symmetric cryptography. A cipher is some sort of a mathematical algorithm that we use to scramble text. In the blackbox model the cipher itself is the blackbox into which we input plaintext and the key. The plaintext is the message that we wish to encrypt and the key is simply a string of numbers, generally binary ones and zeros. The output we get from the blackbox is called ciphertext, which is the plaintext that has been encrypted in such a way that it can only be decrypted by someone that has the same key that originally encrypted the data in the first place. Some examples of Symmetric cryptography that are used today are DES, Triple DES & AES. These are the same as the ciphers used for thousands of years in that the same key encrypts and decrypts them. However the modern algorithm is much stronger. If we use of good cipher such as AES the only way an attacker can decrypt the ciphertext is to try every possible key, called a brute force attack. That is why the longer the key the more security you get. Now supposing Bob wants to buy something on the website Alice.com. He needs to make sure his personal information cannot be seen by anybody eavesdropping on his conversation over the public Internet. At first glance it seems easy enough for Bob to encrypt his plaintext personal information with Symmetric cryptography, using a secret key, send it across the Internet in an encrypted fashion, and then have Alice.com decrypt the information with the same secret key. The problem arises: how do Bob and Alice.com both get the same secret key, while making sure no one else gets the key? The answer is no one has ever thought of a very efficient way. In order to do this, a whole new type of encryption called public key encryption, a.k.a. Asymmetric encryption had to be invented first. In fact it was invented in the 1970s thousands of years after mankind first started using cryptography.
Views: 29990 Packethacks.com
Public Key Cryptography: RSA Encryption Algorithm
 
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RSA Public Key Encryption Algorithm (cryptography). How & why it works. Introduces Euler's Theorem, Euler's Phi function, prime factorization, modular exponentiation & time complexity. Link to factoring graph: http://www.khanacademy.org/labs/explorations/time-complexity
Views: 523685 Art of the Problem
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: 601907 Art of the Problem
RSA: Key Generation / Encryption / Decryption - شرح بالعربي
 
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شرح كامل للتشفير و فك التشفير وعمل المفتاح عن طريق شيفرة RSA بطريقة مبسطة مع حل مثال. - سيف بدران Information Security and Privacy - RSA Cipher Key Creation + Encyption + Decryption Fully Explained with Example. Done By: Saif Badran http://www.facebook.com/saif.badran iTeam Academic Group - JU
Views: 52583 iAcademy
The Story of Digital Signatures and Public Key Infrastructure
 
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This movie explains the concepts behind Digital Signatures and the various components of Public Key Infrastructure in layman's terms from the Indian Context.
Views: 14798 PKIIndia
Secret Key Exchange (Diffie-Hellman) - Computerphile
 
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How do we exchange a secret key in the clear? Spoiler: We don't - Dr Mike Pound shows us exactly what happens. Mathematics bit: https://youtu.be/Yjrfm_oRO0w Computing Limit: https://youtu.be/jv2H9fp9dT8 https://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Computer Science at the University of Nottingham: https://bit.ly/nottscomputer Computerphile is a sister project to Brady Haran's Numberphile. More at http://www.bradyharan.com
Views: 173007 Computerphile
What is Encryption [Hindi]
 
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Friends is video m hum Crytography,Encryption,Decryption,Symmetric key,Asymmetric key,Public key,Private key,Plain text and Cipher text kya hote hai in sb k bare main charcha krne wale hai or janne wale hai ki ye kya hote hai kaise ye kaam krte hai or in k kya kya fayde hai or sath hi hum ye bhi janenge ki Android Phone ko kaise encrypt kiya ja sakta hai toh is video ko End tak dekhen. I hope Aapko ye video Pasand aayegi Please Like,Share and SUBSCRIBE #JAI BHARAT It's My Passion Facebook :-https://www.facebook.com/TechnicalChoro Twitter:-https://twitter.com/TechnicalChoro Google+:-https://plus.google.com/b/114386885239188983906
Views: 19315 Technical Choro
NETWORK SECURITY - RSA ALGORITHM
 
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RSA Algorithm is the example for Public Key Encryption algorithm. Here we are supposed to find two keys 1) Public Key which is used at encryption 2) Private Key which is used at decryption step 1: Select two large Primes P , Q Step 2: Calculate n=P*Q & O(n) = (P-1)*(Q-1) Step 3: Assume e and d (Public and Private Key). Step 4: Encrypt the Plain Text using Public Key e. Step 5: Decrypt the Cipher Text using Private Key d.
RSA Algorithm with solved example using extended euclidean algorithm | CSS series #7
 
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Take the Full Course of Cryptography and Network Security What we Provide 1) 20 Videos (Index is given down) + More Update will be Coming Before final exams 2)Hand made Notes with problems for your to practice 3)Strategy to Score Good Marks in Cryptography and Network Scurity To buy the course click https://goo.gl/mpbaK3 if you have any query email us at [email protected] Sample Notes : https://goo.gl/Ze1FpX or Fill the form we will contact you https://goo.gl/forms/2SO5NAhqFnjOiWvi2 Cryptography and System Security Index Lecture 1 Introduction to Cryptography and Security System Lecture 2 Security Goals and Mechanism Lecture 3 Symmetric Cipher Lecture 4 Substitution Cipher Lecture 5 Transposition Cipher Lecture 6 Stream and Block Cipher Lecture 7 Mono Alphabetic Cipher Lecture 8 Poly Alphabetic Cipher Lecture 9 Diffie Hellman Lecture 10 RSA Algorithm with Solved Example Lecture 11 IDEA Algorithm Full Working Lecture 12 SHA-1 Algorithm Full Working Lecture 13 Blowfish Algorithm Full working Lecture 14 DES Algorithm Full Working Lecture 15 Confusion and Diffusion Lecture 16 AES Algorithm Full working Lecture 17 Kerberos Lecture 18 Malicious Software ( Virus and worms ) Lecture 19 DOS and DDOS Attack Lecture 20 Digital Signature Full working Explained More videos Coming Soon.
Views: 218197 Last moment tuitions
What is Cryptography? - Encryption and Decryption
 
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Understand the basics of cryptography and the concept of symmetric or private key and asymmetric or public key cryptography. Also, a simple example of how cryptography is applied in web browsers. Link to "Applications of Public Key Cryptography" video: https://www.youtube.com/watch?v=Uk1mjEpW33s
Views: 5960 Biz Sci Tech
What is Encryption? Public Key Encryption? Explained in Detail
 
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Namaskaar Dosto, is video mein maine aapko encryption ke baare mein bataya hai, aap sabhi ne computer aur internet use karte time Encryption aur decryption ke baare mein jarur suna hoga, usme aapko SSL encrytpion TSL Encryption, Public Key encryption, private key encryption wagereh ke baare mein bhi suna hoga, aur abhi recently whatsapp ne bhi end to end encryption launch kiya hai, toh aise mein hamare man mein bahut se sawaal hai ki aakhir yeh encryption hota kya hai? Encryption hum hamari email pe bhi use karte hai, aur hum online banking karte time bhi encryption ka use karte hai. Mujhe umeed hai ki yeh video dekhne ke baad aap encryption aur decryption ke baare mein sab kuch jaan jayenge, aur saath hi saath public key encryption ke baare mein bhi samajh jayenge. aur aap aaraam se whatsapp ke encryption feature ko bhi use kar payenge. Win Galaxy S7, S7 Edge Here: http://bit.ly/TheMegaGiveaway Share, Support, Subscribe!!! Subscribe: http://bit.ly/1Wfsvt4 Youtube: http://www.youtube.com/c/TechnicalGuruji Twitter: http://www.twitter.com/technicalguruji Facebook: http://www.facebook.com/technicalguruji Instagram: http://instagram.com/technicalguruji Google Plus: https://plus.google.com/+TechnicalGuruji About : Technical Guruji is a YouTube Channel, where you will find technological videos in Hindi, New Video is Posted Everyday :)
Views: 168211 Technical Guruji
Secure communication with symmetric and asymmetric encryption
 
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Follow our channel at http://vid.io/xomJ Visit our web page at http://vid.io/xomQ In this video I describe how Bob can send a secret message to Alice without Eve getting its content. With asymmetric keys, symmetric encryption and signing they achieve message confidentiality, message integrity, non-repudiation and secure distribution of encryption keys.
Views: 692 nat0.net
Introduction to Cryptographic Keys and Certificates
 
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This video provides a brief introduction to symmetric and asymmetric keys and certificates.
Views: 17808 Paul Turner
RSA Cryptosystem Algorithm (Public Key Algorithm) in Hindi with Example
 
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RSA Cryptosystem Algorithm (Public Key Algorithm) in Hindi with Example Like FB Page - https://www.facebook.com/Easy-Engineering-Classes-346838485669475/ Complete Data Structure Videos - https://www.youtube.com/playlist?list=PLV8vIYTIdSna11Vc54-abg33JtVZiiMfg Complete Java Programming Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnbL_fSaqiYpPh-KwNCavjIr Previous Years Solved Questions of Java - https://www.youtube.com/playlist?list=PLV8vIYTIdSnajIVnIOOJTNdLT-TqiOjUu Complete DBMS Video Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnYZjtUDQ5-9siMc2d8YeoB4 Previous Year Solved DBMS Questions - https://www.youtube.com/playlist?list=PLV8vIYTIdSnaPiMXU2bmuo3SWjNUykbg6 SQL Programming Tutorials - https://www.youtube.com/playlist?list=PLV8vIYTIdSnb7av5opUF2p3Xv9CLwOfbq PL-SQL Programming Tutorials - https://www.youtube.com/playlist?list=PLV8vIYTIdSnadFpRMvtA260-3-jkIDFaG Control System Complete Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnbvRNepz74GGafF-777qYw4
Symmetric vs. Asymmetric Encryption - CompTIA Security+ SY0-301: 6.1
 
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See our entire index of CompTIA Security+ videos at http://www.FreeSecurityPlus.com - The two most common encryption methods are symmetric and asymmetric encryption. In this video, you'll learn the differences and when you might to see these two methods employed to protect your data.
Views: 35217 Professor Messer
Asymmetric Cryptography Algorithms - CompTIA Security+ SY0-401: 6.2
 
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Security+ Training Course Index: http://professormesser.link/sy0401 Professor Messer’s Course Notes: http://professormesser.link/sy0401cn Frequently Asked Questions: http://professormesser.link/faq - - - - - Asymmetric cryptography has enabled secure communication, digital signatures, and much more. In this video, you’ll learn about the well-known asymmetric algorithms of RSA and Diffie-Hellman. - - - - - Download entire video course: http://professormesser.link/401adyt Get the course on MP3 audio: http://professormesser.link/401vdyt Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 25066 Professor Messer
Difference between symmetric and asymmetric key cryptography in bangla || নেটওয়ার্ক সিকিউরিটি
 
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Title: Difference between symmetric and asymmetric key cryptography in bangla || symmetric and asymmetric key encryption in bangla In this video symmetric and asymmetric key encryption is clearly described. The language used in this video is bangla but you'll also understand if you do not understand bangla. If you have any query please put comment. facebook links : https://www.facebook.com/jmshejan https://www.facebook.com/dsteaching/ Please subscribe my channel
Views: 1100 JM Shejan
Symmetric Key Cryptography - Cipher
 
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Symmetric Key Cryptography - Cipher Watch more Videos at https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Arnab Chakraborty, Tutorials Point India Private Limited
Symmetric Key Distrubition with Public Key Crypto (CSS441, L20, Y15)
 
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Tradeoffs of centralised and decentralised key distribution. Performance of public vs symmetric key crypto in OpenSSL. Course material via: http://sandilands.info/sgordon/teaching
Views: 947 Steven Gordon

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