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
Views: 211798 Simply Explained - Savjee
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: 479547 itfreetraining
This video provides a brief introduction to symmetric and asymmetric keys and certificates.
Views: 23427 Paul Turner
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: 427728 Computerphile
This video explains to you how PKI works to create a secure environment.
Views: 85171 SecureMetric
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: 33838 Sunny Classroom
A PKI (public key infrastructure) is often confused with a CA (certificate authority) but it is much more than that. A PKI includes all of the components required to enable the use of certificates. Because of this, it represents the attack surface an attacker can exploit when attempting to leverage certificates and keys in their attacks.
Views: 27972 Paul Turner
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: 17649 PKIIndia
For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com
Views: 24745 Introduction to Cryptography by Christof Paar
PKI Documentation: https://8gwifi.org/docs/pki.jsp Generate CA Authority https://8gwifi.org/cafunctions.jsp CSR, private key validation https://8gwifi.org/certsverify.jsp Policies and Procedures are the most difficult part of implementing a PKI. Key Management Features include: Issuance (CA) Revocation (CRL) Recovery (Key Escrow) Distribution (Directory) History (Archival/Escrow) Digital certificates adhere to the X.509 certificate standard format. Currently in version 3. CRLs are maintained by the CA and list all certificates that have been revoked. Clients are supposed to check if a certificate has been revoked before using it, but this is not always the case in practice. What is PKI Public/Private key pair The public key is a string of bits A public key certificate answers the following questions (and many more) • Whose certificate is it? • What can it be used for? • Is it still valid? • Example uses: – Is this really the key for Jack Nathan? – Can this key be used to send an encrypted message to John Smith? – Was the key used for digitally signing this document valid at the time of signing? cryptography and public key infrastructure public key infrastructure public key infrastructure explained public key infrastructure tutorial pki animation
Views: 30791 Zariga Tongy
Security+ Training Course Index: http://professormesser.link/sy0501 Professor Messer’s Course Notes: http://professormesser.link/501cn Frequently Asked Questions: http://professormesser.link/faq - - - - - The details of a public key infrastructure are sometimes the most important pieces. In this video, you’ll learn about online and offline CAs, OCSP stapling, certificate pinning, and more. - - - - - 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: 16471 Professor Messer
What protocol is used between a web server and its clients to establish trust? How do they negotiate and share the secret key? During the handshake process, how public key encryption algorithm is used and how private key encryption is used? In this video, you would find all these answers. Playlist: Advanced Cryptography - https://www.youtube.com/watch?v=TmA2QWSLSPg&list=PLSNNzog5eydtwsdT__t5WtRgvpfMzpTc7 Playlist: Basic Cryptography https://www.youtube.com/watch?v=vk3py9M2IfE&list=PLSNNzog5eyduN6o4e6AKFHekbH5-37BdV Please subscribe to my channel! Please leave comments or questions! Many thanks, Sunny Classroom
Views: 91682 Sunny Classroom
http://zerotoprotraining.com This video provides and overview of Symmetric and Asymmetric Encryptions including the concepts of public and private keys (PKI)
Views: 108967 HandsonERP
What is public key infrastructure? What is trust? Why do we need trust over the Internet? Who should be trusted? In this video, I will talk about two trust models: Hierarchical Trust Model and distributed trust model, and how they help us to build trust with strangers over the Internet so that we could be able to do business online. I will use an example how these models work. Playlist: Advanced Cryptography - https://www.youtube.com/watch?v=TmA2QWSLSPg&list=PLSNNzog5eydtwsdT__t5WtRgvpfMzpTc7 Playlist: Basic Cryptography https://www.youtube.com/watch?v=vk3py9M2IfE&list=PLSNNzog5eyduN6o4e6AKFHekbH5-37BdV Please subscribe to my channel! Please leave comments or questions! Many thanks, Sunny Classroom
Views: 18275 Sunny Classroom
Digital Signature: https://www.youtube.com/watch?v=TmA2QWSLSPg&t=2s Digital signature is used for authentication, non-repudiation and data integrity, but there is one weakness of digital signature alone: man-in-the-middle attack. Digital certificates are electronic credentials issued by a trusted third party. A digital certificate not only verifies the identity of the owner, but also verifies that the owner owns the public key. In this video, I will demonstrate why digital signature has weakness and how digital certificate comes in place to make sure digitally signed document must come originally from the claimed sender. Advanced Cryptography: https://www.youtube.com/watch?v=TmA2QWSLSPg&list=PLSNNzog5eydtwsdT__t5WtRgvpfMzpTc7 Playlist: Basic Cryptography https://www.youtube.com/watch?v=vk3py9M2IfE&list=PLSNNzog5eyduN6o4e6AKFHekbH5-37BdV Please leave comments, questions and please subscribe! Sunny Classroom
Views: 35271 Sunny Classroom
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: 49818 Hacks And Security
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: 207841 Veet Vivarto
The function of a public key infrastructure (PKI) is to ensure secure delivery and management of public keys. Alternative trust models lead to different key architectures. Public keys are published by means of digitally signed certificates. A private key may be compromised, in which case the certificate containing the corresponding public key must be revoked. Many revocation methods are in current use. Publication of Certificate Revocation Lists (CRLs) and checking with an Online Certificate Status Protocol (OCSP) responder are best established. Learning objectives + learn the components of a public key infrastructure. + understand key delivery and management mechanisms. A lecture by Bart Preneel at SecAppDev 2013 in Leuven, Belgium. Professor Bart Preneel of KU Leuven heads the COSIC (COmputer Security and Industrial Cryptography) research group. His main research area is information security with a focus on cryptographic algorithms and protocols as well as their applications to both computer and network security, and mobile communications. He teaches cryptology, network security and coding theory at the K.U.Leuven and was visiting professor at the Ruhr Universitaet Bochum (Germany), the T.U.Graz (Austria), the University of Bergen (Norway), and the Universiteit Gent (Belgium). In '93-'94 he was a research fellow at the University of California at Berkeley. He has taught intensive courses around the world. He undertakes industrial consulting (Mastercard International, S.W.I.F.T., Proton World International,...), and participates in the work of ISO/IEC JTC1/SC27/WG2. Professor Preneel is Vice President of the International Association for Cryptologic Research (IACR) and co-founder and chairman of LSEC vzw (Leuven Security Excellence Consortium).
Views: 51376 secappdev.org
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: 22385 Professor Messer
Digital Certificate Introduction, PKI, Certificate Authority Lecture in Hindi Keywords: Digital Certificate PKI Certificate Authority
Views: 47338 Easy Engineering Classes
When we are online shopping or banking, we want to make sure it is HTTPS, and a green padlock icon is in the address bar. What does HTTPS mean? What is significant about that small green padlock? To answer these two questions, we need to understand SSL certificate and how it works. Playlist: Advanced Cryptography/Public Key Infrastructure https://www.youtube.com/watch?v=TmA2QWSLSPg&list=PLSNNzog5eydtwsdT__t5WtRgvpfMzpTc7 Playlist: Basic Cryptography https://www.youtube.com/watch?v=vk3py9M2IfE&list=PLSNNzog5eyduN6o4e6AKFHekbH5-37BdV Please leave comments, questions and please subscribe! Sunny Classroom
Views: 121750 Sunny Classroom
This Public Key Cryptography 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: Public 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: 5348 Skillset
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: 5105 Skillset
என்கிரிப்சன் என்றால் என்ன ? தமிழ் டெக் What is Encryption, Decryption & Public Key Encryption? | Tamil Tech Explained.Like and Share this Video, Subscribe and Support us . More Tamil Tech Explained : https://goo.gl/Wxeip0 ****************************************************************** JOIN TAMIL TECH & Support us : Website : www.TamilTechOfficial.com YouTube : https://youtube.com/TamilTechOfficial Facebook: https://facebook.com/TamilTechOfficial/ Twitter: https://twitter.com/TamilTechOffici instagram : http://instagram.com/TamilTechOfficial ****************************************************************** இது போல இன்னும் பல tech வீடியோ உங்கள்ளுக்காக . SUBSCRIBE செய்யவும் . Check Other Videos of TAMIL TECH : FULL PLAYLIST : http://goo.gl/hKNNFX Tamil Tech News :https://goo.gl/0leUcj Tamil Tech Tips : https://goo.gl/nEdDeZ VR Series : https://goo.gl/iRPZ2i YouTuber Series : https://goo.gl/YvWnCX Tamil Tech Top APP Series : https://goo.gl/2mnxV9 Top Smartphones : https://goo.gl/SuXYhz Best Buy Tips : https://goo.gl/BTKvc9 My Opinions : https://goo.gl/41WgxA Whatsapp Tips & Tricks : https://goo.gl/A1qRo4 Super Gadget Unboxing & Review : https://goo.gl/edTy52 Android TIps & Tricks : https://goo.gl/OeD4m0 Real or Fake Series : https://goo.gl/sR9EH4 Tamil Tech Super app : https://goo.gl/C7872Y Tamil Tech Achivement : https://goo.gl/6rbl8c Tamil Tech Live QnA :https://goo.gl/LVFhyF Tamil Tech Prime : https://goo.gl/wSH6qD How to Tamil : https://goo.gl/npdNGR Tamil Tech Unboxng : https://goo.gl/KnhwJt ---------------------------------------------------------------------------------------------------- My ENGLISH TECH CHANNEL - HOWISIT : YOUTUBE : https://www.youtube.com/c/howisitin Facebook: https://www.facebook.com/howisit.in , Twitter: https://www.twitter.com/howisitin , Google plus: https://plus.google.com/u/howisitin, website : http://howisit.in
Views: 53001 TAMIL TECH - தமிழ் டெக்
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: 627123 Art of the Problem
http://spirent.com This video will explain the math behind the RSA algorithm and how Public Key, Private Key encryption works. This is the basis for SSL/TLS, SSH, PGP, Digital Certificates etc. It will also briefly cover the history of RSA, the people and organization behind it.
Views: 61501 alantalkstech
This video explains the basics of how a browser validates a web server certificate and the CA certificate chain.
Views: 4908 Paul Turner
Difference between Asymmetric Key and Symmetric Key Cryptography Keywords: Asymmetric Key Cryptography Symmetric Key Cryptography Network Security Notes
Views: 40337 Easy Engineering Classes
Encryption was introduced here: https://www.youtube.com/watch?v=yWgKSx0eFzY, and now we are digging deeper into encryption keys, both public and private. This topic is especially important for Internet security. If this video was useful, please like it and subscribe, it really helps! Also, if you use an ad blocker, whitelisting my channel is very much appreciated! Any questions/ feedback/ enquiries: [email protected] These videos will always be free but if you'd consider a donation I'd be extremely grateful: https://www.paypal.me/computersciencetutor If you are studying for a specific course, to watch the videos in their intended order and only those applicable to your Computer Science course, please use the playlists on my channel page.
Views: 652 Computer Science Tutor
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: 43176 Android Authority
Demonstration of using OpenSSL to create RSA public/private key pair, sign and encrypt messages using those keys and then decrypt and verify the received messages. Commands used: openssl. Created by Steven Gordon on 7 March 2012 at Sirindhorn International Institute of Technology, Thammasat University, Thailand.
Views: 63926 Steven Gordon
PalaestraTraining.com This video on Cryptography (Part 1 of 3) is part of our CISSP certification Training Series. (ISC)2 CISSP certification is one of the top security certifications you can achieve, and our expert instructor walks you step by step trough all 10 domains in the CISSP Common Body of Knowledge (CBK). Visit us at PalaestraTraining.com for full details about this amazing series.
Views: 204471 The Geek Academy
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: 24136 Sunny Classroom
Brief on Symmetric and Asymmetric Keys Digital Certificates - X.509 and GPG Commands to generate asymmetric keys and digital certificate. X.509 commands: Key Pair Creation: openssl req -new -x509 -newkey rsa:2048 -keyout Private.key -out Public.crt -days 365 -nodes -sha256 Dump Private key contents: openssl rsa -in Private.key -noout –text Dump public key contents: openssl x509 -in Public.crt -noout -text GPG Commands: Key pair creation: gpg --gen-key List gpg keys: gpg --list-keys Dump key contents: gpg -a --export key-name | gpg --list-packets --debug 0x02 Reach me at Linkedin for comments/suggestions: www.linkedin.com/in/sameer-pasha-7aba6393
Views: 1908 Sameer Pasha
Extract public key for verification: http://stackoverflow.com/questions/10271197/openssl-how-to-extract-public-key Verify sign : https://raymii.org/s/tutorials/Sign_and_verify_text_files_to_public_keys_via_the_OpenSSL_Command_Line.html Encrpytion : http://askubuntu.com/questions/60712/how-do-i-quickly-encrypt-a-file-with-aes Measure time ; http://askubuntu.com/questions/53444/how-can-i-measure-the-execution-time-of-a-terminal-process Cpp files : (openssl sample code) http://www.cis.syr.edu/~wedu/seed/Labs_12.04/Crypto/Crypto_PublicKey/
Views: 3274 Jae duk Seo