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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: 496713 itfreetraining
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 - 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
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: 24701 Technical Choro
Symmetric Key Cryptography (CISSP Free by Skillset.com)
 
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This Authentication training video is part of the CISSP FREE training course from Skillset.com (https://www.skillset.com/certifications/cissp). Skillset helps you pass your certification exam. Faster. Guaranteed. https://www.skillset.com Topic: Symmetric Key Cryptography Skill: Cryptography Fundamentals Skillset: Security Engineering Certification: CISSP Join the 40,000+ candidates in over 58 countries that have found a faster, better way to pass their certification exam. + Unlimited access to thousands of practice questions + Exam readiness score + Smart reinforcement + Focused training ensures 100% exam readiness + Personalized learning plan + Align exam engine to your current baseline knowledge + Eliminate wasted study time + Exam pass guarantee And much more - https://www.skillset.com
Views: 5443 Skillset
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: 42428 Zariga Tongy
What is PUBLIC-KEY CRYPTOGRAPHY? What does PUBLIC-KEY CRYPTOGRAPHY mean?
 
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What is PUBLIC-KEY CRYPTOGRAPHY? What does PUBLIC-KEY CRYPTOGRAPHY mean? PUBLIC-KEY CRYPTOGRAPHY meaning - PUBLIC-KEY CRYPTOGRAPHY definition - PUBLIC-KEY CRYPTOGRAPHY explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. Public-key cryptography, or asymmetric cryptography, is any cryptographic system that uses pairs of keys: public keys that may be disseminated widely paired with private keys which are known only to the owner. There are two functions that can be achieved: using a public key to authenticate that a message originated with a holder of the paired private key; or encrypting a message with a public key to ensure that only the holder of the paired private key can decrypt it. In a public-key encryption system, any person can encrypt a message using the public key of the receiver, but such a message can be decrypted only with the receiver's private key. For this to work it must be computationally easy for a user to generate a public and private key-pair to be used for encryption and decryption. The strength of a public-key cryptography system relies on the degree of difficulty (computational impracticality) for a properly generated private key to be determined from its corresponding public key. Security then depends only on keeping the private key private, and the public key may be published without compromising security. Public-key cryptography systems often rely on cryptographic algorithms based on mathematical problems that currently admit no efficient solution—particularly those inherent in certain integer factorization, discrete logarithm, and elliptic curve relationships. Public key algorithms, unlike symmetric key algorithms, do not require a secure channel for the initial exchange of one (or more) secret keys between the parties. Because of the computational complexity of asymmetric encryption, it is usually used only for small blocks of data, typically the transfer of a symmetric encryption key (e.g. a session key). This symmetric key is then used to encrypt the rest of the potentially long message sequence. The symmetric encryption/decryption is based on simpler algorithms and is much faster. Message authentication involves hashing the message to produce a "digest," and encrypting the digest with the private key to produce a digital signature. Thereafter anyone can verify this signature by (1) computing the hash of the message, (2) decrypting the signature with the signer's public key, and (3) comparing the computed digest with the decrypted digest. Equality between the digests confirms the message is unmodified since it was signed, and that the signer, and no one else, intentionally performed the signature operation — presuming the signer's private key has remained secret. The security of such procedure depends on a hash algorithm of such quality that it is computationally impossible to alter or find a substitute message that produces the same digest - but studies have shown that even with the MD5 and SHA-1 algorithms, producing an altered or substitute message is not impossible. The current hashing standard for encryption is SHA-2. The message itself can also be used in place of the digest. Public-key algorithms are fundamental security ingredients in cryptosystems, applications and protocols. They underpin various Internet standards, such as Transport Layer Security (TLS), S/MIME, PGP, and GPG. Some public key algorithms provide key distribution and secrecy (e.g., Diffie–Hellman key exchange), some provide digital signatures (e.g., Digital Signature Algorithm), and some provide both (e.g., RSA). Public-key cryptography finds application in, among others, the information technology security discipline, information security. Information security (IS) is concerned with all aspects of protecting electronic information assets against security threats. Public-key cryptography is used as a method of assuring the confidentiality, authenticity and non-repudiability of electronic communications and data storage.
Views: 849 The Audiopedia
Cryptography basics: What is Encryption and Decryption
 
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Get Full Course: http://www.engineeringmentor.com/CNYTv3 Networks #3: This tutorial introduces the Cryptography basics. It also explains what is Encryption and Decryption. a) Cryptography basics (00:21):http://youtu.be/BEb_AnPWPwY?t=21s how do we provide this security during transmission? Well, One way of ensuring security can be use of CRYPTOGRAPHY! Cryptography is a field of network security which deals with hiding "real" infromation when it is under transmission between the two parties. Usually, the real information is transformed or hidden into another message and transmitted over the network. This transformed message in itself will make no sense even if any hacker gets hold of this information. When it reaches the destination, the receipent will know a method to de-transform the garbage message into the original information which the sender had sent.method of transforming message at sender's side and de transforming at reciever's side forms the basic model of Cryptography. b) Encryption and Decryption (3:57):http://youtu.be/BEb_AnPWPwY?t=3m57s First, the information to be transmitted, called as plain text(or message) is fed to an Encryption system. The Encyrption system uses a key to convert the plain text to encyrpted form which looks like garbage value. This is also called as cipher text. A corresponding key is used at the other end to decrypt the cipher text back to original message. When we say a key, it actually means a piece of string value which is fed to encyprtion and decryption algorithms along with the text for transformation. When the message reaches the destination, this system at the other end decrypts the cipher text into original message with the help of the key. This is called as Decryption System. The output of the Decryption System is the intended message. Depending on how the keys are shared, we can classify crytography as symmetric and asymmetric. If the keys used by both parties are same, then it is called symmetric key cryptography, or private key cryptography. If both parties use different keys for encyrption and decryption, then it is called asymmetric key cryptography or public key cryptography. video URL : https://www.youtube.com/watch?v=BEb_AnPWPwY Watch ALL CN VIDEOS: https://www.youtube.com/playlist?list=PL9OIoIp8YySF4mkIihOb_j2HZIRIlYuEx For more, visit http://www.EngineeringMentor.com Facebook: https://www.facebook.com/EngineeringMentor Twitter : https://twitter.com/Engi_Mentor
Views: 108576 Skill Gurukul
Session Keys
 
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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: 5178 Udacity
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: 204182 Technical Guruji
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: 582273 Art of the Problem
What Is Public Key Cryptography (PKC) Full Explain In Hindi For O level Exam
 
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What Is Public Key Cryptography? What is encryption encryption-kya-hota-hai ╔╦╦╦═╦╗╔═╦═╦══╦═╗☆ ║║║║╩╣╚╣═╣║║║║║╩╣TO My Channel ╚══╩═╩═╩═╩═╩╩╩╩═╝☆ Subscribe my channel like videos comment below any query to Subscribe Us & Comment:- https://goo.gl/FJ1nWJ Follow On social site © original channel ██║▌│║║█║█║▌║║█║▌│ █ __/LINKS\_ ► Facebook:➜ http://facebook.com/techvideoguru ► Twitter:➜ https://mobile.twitter.com/techvideoguru ► Google+:➜ https://plus.google.com/u/0/107344256878607670469 ► Website:➜ http://techvideoguru.mobi ►Youtube:-https://www.youtube.com/techvideoguru ►Blog:-http://techvideoguru.blogspot.in ►Instagram:-https://www.instagram.com/techvideoguru/ ►Pinterest:- https://www.pinterest.com/techvideoguru/ ►Dailymotion:-http://www.dailymotion.com/techvideoguru ►LinkedIn:-https://in.linkedin.com/in/vikas-kumar-maurya-27262b78 ================================================ ╔══════════════════════╗ __|Watch More Videos|_ https://goo.gl/FJ1nWJ ╚══════════════════════╝
Views: 69488 TechVideo Guru
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: 640664 Art of the Problem
Symmetric encryption
 
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Symmetric encryptionSymmetric encryption algorithms are based on one and the same key used by a sender and a recipient. The information exchange process includes three stages: - a sender sends a key to a recipient; - using this key, the sender encrypts the message and forwards it to the recipient; - the recipient receives the message and decrypts it.A number of factors account for the security level provided by conventional techniques: - Firstly, the encryption algorithm should be reliable enough so that the encrypted message could not be decrypted without the key; - Secondly, the security of the transmitted message should depend on the key only rather than on the algorithm secrecy; - And thirdly, the algorithm should prevent from learning the key even if you know a lot of encrypted/unencrypted pairs.For example, the well-known Caesar cipher is quite easy to decipher, even if you don't know the key. Let me demonstrate you how: - We write a decrypted text; - Then we write the decrypted alphabet under the text; - Then we can read the text going from line to line.However, unlike Caesar cipher, if, instead of a constant shift, we use a variable shift which also changes from message to message, we will get rather a reliable encryption system.This method of encryption is called Vigenère cipher. The shift value is defined by a key word which is usually placed in the beginning of a message. The shift is determined by comparing the key word with the transmitted word. For instance, our key word is LASER. The transmitted word will be as follows:In this event the key will be as follows:Symmetric encryption offers such advantages as high data transmission rate, simple implementation, quite a small key length, and sufficient reliability.Symmetric encryption has one substantial shortcoming. It is useless for authentication as the key is known to both parties.
Views: 1177 ChipDipvideo
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: 211742 Veet Vivarto
Introduction to Cryptographic Keys and Certificates
 
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This video provides a brief introduction to symmetric and asymmetric keys and certificates.
Views: 32423 Paul Turner
Diffie Hellman Key Exchange in Hindi for Symmetric Key Encryption System – With Example
 
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Diffie Hellman Key Exchange in Hindi for Symmetric Key Encryption System – 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 Key Encryption
 
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Views: 195 Oorja Mathur
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: 1248 Steven Gordon
Public-key cryptography Meaning
 
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Video shows what public-key cryptography means. A form of cryptography which allows users to communicate securely without previously agreeing on a shared secret key (abbreviation PKC). public-key cryptography synonyms: asymmetric cryptography, public-key encryption. Public-key cryptography Meaning. How to pronounce, definition audio dictionary. How to say public-key cryptography. Powered by MaryTTS, Wiktionary
Views: 3926 SDictionary
The Internet: Encryption & Public Keys
 
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Mia Epner, who works on security for a US national intelligence agency, explains how cryptography allows for the secure transfer of data online. This educational video explains 256 bit encryption, public and private keys, SSL & TLS and HTTPS. Learn more at http://code.org/ Help us translate into your language: http://code.org/translate/videos Stay in touch with us! • on Twitter https://twitter.com/codeorg • on Facebook https://www.facebook.com/Code.org • on Instagram https://instagram.com/codeorg • on Tumblr https://blog.code.org • on LinkedIn https://www.linkedin.com/company/code... • on Google+ https://google.com/+codeorg Help us caption & translate this video! https://amara.org/v/HGaS/
Views: 237430 Code.org
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
Views: 115809 Sundeep Saradhi Kanthety
Network & Cyber Security Lecture: Symmetric key Encryption (Private Key) Key Based Cryptography
 
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In this methodology, the encryption algorithm combines with a key and plaintext to create the ciphertext. There are two types of keys 1) Symmetric Key (Private Key) 2) Asymmetric Key (Public Ky) Symmetric Key both encryption & decryption operations use the same key with the sender and receiver Symmetric Key encryption algorithm uses the small length key and can quickly encrypt large quantities of data
Views: 650 Sanjay Pathak
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: 1777 JM Shejan
eSecurity: Symmetric Key Encryption
 
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https://asecuritysite.com/esecurity/unit02
Views: 246 Bill Buchanan OBE
Basics of Cryptography: Definitions to beginners
 
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Understand terms used in cryptography: cryptography, encryption, decryption, key, symmetric key cryptography, asymmetric key cryptography, cryptology etc
Views: 159 DrVikasThada
Cryptography Explained: Public-Key vs Symmetric Cryptography
 
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Cryptography Explained for Beginners: This Lisk Academy video breaks down how cryptography works in blockchain and highlights 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 will make it easy for developers to build and deploy blockchain applications in JavaScript. Learn about the leading platform for world-changing apps at https://lisk.io/products. 👨‍💻👩‍💻 For developers: GitHub: https://github.com/LiskHQ Gitter: https://gitter.im/LiskHQ/lisk Documentation: https://lisk.io/documentation 🔒 Store your LSK in our official wallet: https://lisk.io/hub 🔎 View our blockchain explorer: https://explorer.lisk.io/ 🗞Read our latest news on the Lisk Blog: https://blog.lisk.io/ 👩‍🚀👨‍🚀 Meet the team: https://lisk.io/team 🎥 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/ Facebook: http://facebook.com/liskhq LinkedIn: https://www.linkedin.com/company/lisk/
Views: 5936 Lisk
DiSE: Distributed Symmetric-key Encryption
 
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We put forth the first formal treatment for distributed symmetric-key encryption, proposing new notions of correctness, privacy and authenticity in presence of malicious attackers. We provide strong and intuitive game-based definitions that are easy to understand and yield efficient constructions. We propose a generic construction of threshold authenticated encryption based on any distributed pseudorandom function (DPRF). Read this paper in the ACM Digital Library: https://dl.acm.org/citation.cfm?id=3243774
Digital Signature - Asymmetric Key , Why used for Authentication & Non Repudiation (Hindi)
 
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Digital Signature - Asymmetric Key Cryptography, Why used for Authentication and Non Repudiation (Hindi) Keywords: Digital Signature Asymmetric Encryption Authentication Non Repudiation
Symmetric Key Encryption and Data Authentication
 
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Dig a little deeper into symmetric key encryption to find out about one of the basic methods of encrypting data and a simple algorithm for checking that the data is authentic.
Views: 644 Vidder, Inc.
Symmetric Key Ciphers
 
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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: 18511 nptelhrd
This is how encryption works ! Public-key cryptography
 
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Hello all, In this week's video, we look into a layman's explanation of how cryptography works. We dig into the usage of keys for symmetric and public-key cryptography. And also, get a primer on digital signature. For a more detailed explanation, check out these: https://www.globalsign.com/en-in/ssl-information-center/what-is-public-key-cryptography/ Hope you like it! This video makes use of Icons made by Flat Icons (https://www.flaticon.com/authors/flat-icons) from www.flaticon.com
Public Key Cryptography: Diffie-Hellman Key Exchange (short version)
 
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This is a segment of this full video: https://www.youtube.com/watch?v=YEBfamv-_do Diffie-Hellman key exchange was one of the earliest practical implementations of key exchange within the field of cryptography. It relies on the discrete logarithm problem. This test clip will be part of the final chapter of Gambling with Secrets!
Views: 452069 Art of the Problem
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: 241686 Computerphile
Winter School on Cryptography Symmetric Encryption: Definitions, Modes and MACs - Kenny Paterson
 
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The topic of the 4th Annual Bar-Ilan Winter School on Cryptography held in January 2014, was Symmetric Encryption in Theory and in Practice. The winter school studied symmetric encryption in theory and in practice, and included a study of the theoretical foundations of symmetric encryption on the one hand, and practical constructions and cryptanalysis on the other hand. As every year, the event organizers were Prof. Yehuda Lindell and Prof. Benny Pinkas, of BIU's Department of Computer Science. This year,the Winter School featured speakers from such institutions as the Royal Holloway at the University of London , and the University of Wisconsin - Madison. For all videos of this playlist: https://www.youtube.com/playlist?list=PLXF_IJaFk-9BmvxWhnxPId32CPJhVtU6D 4th Annual Bar-Ilan Winter School on Cryptography: http://crypto.biu.ac.il/winterschool2014/ Prof. Lindell's Lab http://www1.biu.ac.il/indexE.php?id=8043&pt=30&pid=7711&level=2&cPath=7702,7711,8043 Prof. Pinkas' Lab http://www1.biu.ac.il/indexE.php?id=8046&pt=30&cPath=7702,7711,8046 Dept. of Computer Science: http://cs.biu.ac.il/en/ Bar-Ilan University: http://www1.biu.ac.il/en
Views: 455 barilanuniversity
OCR A'Level Symmetric & asymmetric encryption
 
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OCR Specification Reference A Level 1.3.1c Why do we disable comments? We want to ensure these videos are always appropriate to use in the classroom. However, we value your feedback, and are happy to consider amendments due to inaccuracies. Please get in touch with us directly at: [email protected] For full support and additional material please visit our web site http://craigndave.org
Views: 9017 craigndave
NETWORK SECURITY - DIFFIE HELLMAN KEY EXCHANGE ALGORITHM
 
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This Algorithm is used to exchange the secret /symmetric key between sender and receiver. This exchange of key can be done with the help of public key and private key step 1 Assume prime number p step 2 Select a such that a is primitive root of p and a less than p step 3 Assume XA private key of user A step 4 Calculate YA public key of user A with the help of formula step 5 Assume XB private key of user B step 6 Calculate YB public key of user B with the help of formula step 7 Generate K secret Key using YB and XA with the help of formula at Sender side. step 8 Generate K secret Key using YA and XB with the help of formula at Receiver side.
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: 13006 Guru Kpo
NETWORK SECURITY - DES (DATA ENCRYPTION STANDARD) ALGORITHM
 
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DES algorithm follows the Feistel Structure Most of the Block cipher algorithms follows Feistel Structure BLOCK SIZE - 64 bits Plain Text No. of Rounds - 16 Rounds Key Size - 64 bits Sub Key Size - 48 bits No. of Sub Keys - 16 Sub Keys Cipher Text - 64 bits
Views: 188874 Sundeep Saradhi Kanthety
what is encryption and decryption ? about cryptography | TECH SETTAI TAMIL
 
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what is encryption and decryption ? about cryptography | TECH SETTAI TAMIL its about the type of attack in cryptography, use of encryption and decryption. why encryption are used where encryption are used types of attack in cryptography and more SUBSCRIBE US BY CLICKING RED SUBSCRIBE BUTTON, SUPPORT US ON FB, TWITTER AND ALSO G+ twitter: https://twitter.com/TechSettai fb:https://www.facebook.com/techsettai/ g+ :https://plus.google.com/u/1/117864875... -~-~~-~~~-~~-~- Please watch: "how to install app not available in INDIA | TECH SETTAI TAMIL" https://www.youtube.com/watch?v=wF5JAhDvPQM -~-~~-~~~-~~-~-
Key Distribution Centres - KDCs
 
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Demo: https://asecuritysite.com/encryption/ker Demo: https://asecuritysite.com/encryption/kdc01 Article: https://medium.com/asecuritysite-when-bob-met-alice/getting-anyway-from-pki-and-properly-defining-a-trust-infrastructure-94fc5469ba2a
Views: 317 Bill Buchanan OBE
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
Views: 131532 Easy Engineering Classes
Cryptography Symmetric Encryption
 
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Symmetric Encryption Section 2 continues its focus on Cryptographic tools with an in-depth introduction and analysis of Symmetric Encryption. The Symmetric Encryption discussion opens by reviewing the usage of random numbers, explaining what Replay Attack is, the importance of unique information on data packets and in sequencing and defining key terms including Nonce and Key Generation. Then, you’re introduced to Symmetric Encryption with a basic summary of how it works, what ciphers are, the different types of Symmetric Ciphers, what happens with block ciphers, and what the difference means to encryption and decryption as a process. As a penetration tester, you must know the difference between confusion and diffusion. You’ll observe how that correlates to how algorithms work and the importance of strong math in configuring algorithms. And you’ll learn what happens as algorithms are used and what you need to look for in your testing results. For more updates : Subscribe Cybrary.it Here : https://goo.gl/rjJhWe LIKE | COMMENT | SHARE | SUBSCRIBE ----------------------------------------------------------------------------------
Views: 38 cybrary
What is Encryption? |Symmetric Key and Public Key Encryption?|How Does It Work? - in Hindi
 
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Namashkar Dostoon iss video me mai apko bata raha hoon ki Encryption kya hai ,Symmetric Key and Asymmetric Key Encryption (Public Key Encryption) kya hai.. iss video me encryption ko real-life example se jodd kr btaya gya hai...Topic thoda sa confusing hai umid hai aap iss video ko thoda sa dhyaan se dekhen to apko samj ajyega ki Encryption hota kaise hai or cheejen kaam kaise krti hai.... Umid hai ki video pasand ayega, milte hai next video me tab tak ke liye KUSH RAHO, MAST RAHO Thank You
Views: 377 Glorious Frog
Public and Private Key Encryption in Hindi
 
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Views: 1221 O Level Projects
Ethical Hacking - Symmetric and Asymmetric Cryptography
 
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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: 62169 Udacity
[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: 102322 Technical Sagar