public key - New Videos

Public Key Cryptography - ComputerphilePublic Key Cryptography - Computerphile
00:06:20July 22, 2014, 7:59 am
Public Key Cryptography - Computerphile

Channel: Computerphile & Total View: 375052

Add Date: July 22, 2014, 7:59 am & Duration: 00:06:20

Likes: 8540 | Dislike: 113


computers, computerphile, Public-key Cryptography, Cryptography (Software Genre), computer, computer science, secrets, university of nottingham

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.

This video was filmed and edited by Sean Riley.

Computer Science at the University of Nottingham:

Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at:

Symmetric Key and Public Key EncryptionSymmetric Key and Public Key Encryption
00:06:45June 18, 2013, 5:09 am
Symmetric Key and Public Key Encryption

Channel: itfreetraining & Total View: 379054

Add Date: June 18, 2013, 5:09 am & Duration: 00:06:45

Likes: 1512 | Dislike: 147


Encryption, Symmetric key, PKI, ITFreeTraining, Windows Server (Operating System), Information Technology (Industry), Security (Quotation Subject)

Modern day encryption is performed in two different ways. Check out or 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

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...

How does public key cryptography work – Gary explains

Channel: Android Authority & Total View: 32477

Add Date: October 4, 2016, 6:27 am & Duration: 00:15:47

Likes: 1377 | Dislike: 24


AndroidAuthority, Android, Gary Explains, Cryptography, Public Key, Encryption

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:

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Asymmetric encryption - Simply explainedAsymmetric encryption - Simply explained
00:04:40October 30, 2017, 1:00 am
Asymmetric encryption - Simply explained

Channel: Simply Explained - Savjee & Total View: 71573

Add Date: October 30, 2017, 1:00 am & Duration: 00:04:40

Likes: 2526 | Dislike: 25


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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!

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Public key cryptography - Diffie-Hellman Key Exchange (full version)

Channel: Art of the Problem & Total View: 564560

Add Date: July 30, 2012, 5:00 pm & Duration: 00:08:38

Likes: 9039 | Dislike: 86


Diffie-Hellman Key Exchange, public key cryptography, diffie, cryptography, encryption, public key

The history behind public key cryptography & the Diffie-Hellman key exchange algorithm.
We also have a video on RSA here:

Public & Private Keys Explained (Litecoin/Bitcoin)

Channel: Franklyn [Litecoin] & Total View: 70641

Add Date: June 9, 2015, 11:20 am & Duration: 00:04:14

Likes: 629 | Dislike: 46


Litecoin, Bitcoin, Private Key, Dogecoin, Public-key Cryptography, Cryptography (Software Genre), Encryption, crypto currency, currency, Public and private keys, Public and private keys bitcoin, bitcoin private key, public and private key encryption, private key and public key, computerphile, LitecoinAssociation

By now you have most probably already heard of the term Public & Private keys, but what exactly are they and more to the point what do they even do?

Note, 204 Tresvigintillion is the amount of time a standard desktop PC would take to crack a key - via

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Cryptography: The Math of the Public Private Key of RSA

Channel: patrickJMT & Total View: 32588

Add Date: August 26, 2016, 4:17 pm & Duration: 00:19:13

Likes: 1013 | Dislike: 28


math, encryption, public, private, key, NSA, RSA, #sciencegoals, key distribution, cryptography, rivest, shimar, adleman, factor, prime number, one way function

Thanks to all of you who support me on Patreon. You da real mvps! $1 per month helps!! :) !! Part 1:
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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:
A big thanks to the 'Making & Science team at Google' for sponsoring this video!
Please like and share using hashtag #sciencegoals

What is Public Key Infrastructure (PKI) by SecureMetric

Channel: SecureMetric & Total View: 58263

Add Date: July 7, 2015, 7:26 pm & Duration: 00:03:41

Likes: 386 | Dislike: 11


Public Key Infrastructure, Cryptography (Software Genre), Public-key Cryptography

This video explains to you how PKI works to create a secure environment.

Private and Public Key EncryptionPrivate and Public Key Encryption
00:02:18December 9, 2012, 11:34 am
Private and Public Key Encryption

Channel: Nihal Acar & Total View: 75268

Add Date: December 9, 2012, 11:34 am & Duration: 00:02:18

Likes: 547 | Dislike: 65


private key, public key, encryiption, itgs, common craft, asymmetric encryption

Asymmetric Encryption
A common craft video I made for my ITGS lesson.

Public Key EncryptionPublic Key Encryption
00:03:59October 18, 2015, 5:28 pm
Public Key Encryption

Channel: Sooraj Sidhu & Total View: 22119

Add Date: October 18, 2015, 5:28 pm & Duration: 00:03:59

Likes: 70 | Dislike: 12


Encryption (Literature Subject), Public-key Cryptography, Cryptography (Software Genre), Key

Topic: Explain how public key encryption can be used to secure email and other communications.

Public and Private Key- How it works in Bitcoin.Public and Private Key- How it works in Bitcoin.
00:16:31April 14, 2017, 3:53 am
Public and Private Key- How it works in Bitcoin.

Channel: ABI International & Total View: 13282

Add Date: April 14, 2017, 3:53 am & Duration: 00:16:31

Likes: 145 | Dislike: 13


public key, private key, cryptography in bitcoin, bitcoin public and private key

RSA Public Key Encryption Algorithm (cryptography). How & why it works.
See my blog for more about bitcoin and it's emeging opportunity

Private Key and Public KeyPrivate Key and Public Key
00:05:54May 19, 2016, 7:05 pm
Private Key and Public Key

Channel: Rebecca Yan & Total View: 4415

Add Date: May 19, 2016, 7:05 pm & Duration: 00:05:54

Likes: 21 | Dislike: 4

Give the introduction to the basic two types of encryption, public key and private key.

What is Encryption? Public Key Encryption? Explained in Detail

Channel: Technical Guruji & Total View: 133290

Add Date: April 7, 2016, 2:08 am & Duration: 00:06:25

Likes: 4073 | Dislike: 212


technical guruji, technicalguruji, encryption, what is encryption, encryption in hindi, public key encryption, how encryption works, encryption explained, public key encryption explained, how, works, working, principle, hindi, urdu, whatsapp encryption, email encryption, message encryption, how to encrypt, how to decrypt

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.

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SSH Public Key Authentifizierung mit PuTTY und PuTTYgen

Channel: & Total View: 3236

Add Date: January 25, 2014, 9:33 am & Duration: 00:08:25

Likes: 16 | Dislike: 1


public, key, ssh, pubkey, publickey, authentifizierung, putty, puttygen, debian, linux, jiffy, jiffybox

Wie man ein Schlüsselpaar erstellt, Publickey-Authentifizierung auf dem Server aktiviert und eine Verbindung mit PuTTY herstellt.
Etwas wichtiges habe ich im Video vergessen, aber dafür lohnt es nicht ein neues zu machen:
Beim Passwortverfahren wird der Hash des Passworts auf dem Server gespeichert, kann von einem Eindringling (z.B. per PHP) gelesen und dann eventuell geknackt werden. Das ist beim PubKey-Verfahren unmöglich.


Public Keys Part 2 - RSA Encryption and Decryptions

Channel: Daniel Rees & Total View: 50815

Add Date: April 25, 2014, 8:56 pm & Duration: 00:09:05

Likes: 244 | Dislike: 23



Asymmetric Part 2 - RSA includes tutorial on how to encrypt and decrypt as well as calculating the keys and euclidean algorithm.

Public Key Encryption (Asymmetric Key Encryption)

Channel: Sunny Classroom & Total View: 7868

Add Date: June 28, 2017, 8:59 am & Duration: 00:05:06

Likes: 136 | Dislike: 3


networking, cybersecurity, security+, networking +, cyber threats, cyber defense, IoT, Wi-Fi security, public key encryption, asymmetrick key encryption, private key encryption, Sunny Classroom, Basic cryptography, public key encrytion

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

Advanced Cryptography:

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The Internet: Encryption & Public KeysThe Internet: Encryption & Public Keys
00:06:40August 21, 2015, 4:45 pm
The Internet: Encryption & Public Keys

Channel: & Total View: 160126

Add Date: August 21, 2015, 4:45 pm & Duration: 00:06:40

Likes: 1339 | Dislike: 16

Tags:, computer science, code, Hour of Code, encryption, public keys, private keys, security, https, programming, web, online, data, breach, secure, decrypt, cryptography

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.

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Private/Public Key SSH in Windows using freeSSHd and PuTTYgen - 5/5

Channel: danscourses & Total View: 68808

Add Date: March 7, 2011, 1:23 pm & Duration: 00:05:50

Likes: 112 | Dislike: 3


public, key, SSH, Windows, PuTTY, Puttygen, freeSSHd

A tutorial on private-public key authentication in Windows using freeSSHd, PuTTY, and PuTTYgen. 5/5 in a series on SSH and key pair authentication

Introduction to Public-Key CryptographyIntroduction to Public-Key Cryptography
01:31:02January 26, 2013, 3:50 am
Introduction to Public-Key Cryptography

Channel: Kiran Kuppa & Total View: 22484

Add Date: January 26, 2013, 3:50 am & Duration: 01:31:02

Likes: 80 | Dislike: 1


pki, cryptography, rsa, encryption

Learn Public Key Cryptography in just 18 Minutes - Cryptography Tutorial

Channel: & Total View: 26241

Add Date: December 9, 2016, 9:53 am & Duration: 00:18:07

Likes: 410 | Dislike: 21


cryptography tutorial, Public Key Cryptography, public key, rsa, cryptography, ssl, digital signature, encryption, cipher, pki, tls, rsa encryption, key exchange, private key, Huckleberry, IT Educational, des, public key private key pair, key pair, security, digital certificate, decryption, ciphers, public keys, public key infrastructure, hash, network security, aes, cryptography overview, symmetric key, Windows Server, Information Technology, cryptography basics, cryptography explained

+++See my latest video: Internet Security or Die+++

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...

2.4.1 RSA Public Key Encryption: Video2.4.1 RSA Public Key Encryption: Video
00:21:45September 12, 2016, 11:13 am
2.4.1 RSA Public Key Encryption: Video

Channel: MIT OpenCourseWare & Total View: 12331

Add Date: September 12, 2016, 11:13 am & Duration: 00:21:45

Likes: 95 | Dislike: 8

MIT 6.042J Mathematics for Computer Science, Spring 2015
View the complete course:
Instructor: Albert R. Meyer

License: Creative Commons BY-NC-SA
More information at
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Key ExchangeKey Exchange
00:03:29June 9, 2009, 1:00 am
Key Exchange

Channel: ProfChrisBishop & Total View: 134098

Add Date: June 9, 2009, 1:00 am & Duration: 00:03:29

Likes: 1103 | Dislike: 10


Royal Institution, Christmas Lectures 2008, Christopher, Chris Bishop, Hitech, Microsoft Research, science demonstration, key exchange, padlocks, briefcase, Diffie Hellman, cryptography, internet, security, untangling the web

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: 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:

Recover RSA private key from public keys - rhme2 Key Server (crypto 200)

Channel: LiveOverflow & Total View: 25281

Add Date: April 21, 2017, 8:15 am & Duration: 00:12:42

Likes: 881 | Dislike: 7


Live Overflow, liveoverflow, hacking tutorial, how to hack, exploit tutorial, crypto, cryptography, RSA, breaking RSA, breaking signature, forge rsa signature, recover private key, hack private key, rsa private key, rsa public key, public private key, asymmetric cryptography, how does rsa work, how to break rsa, how to encrypt rsa, how to sign rsa, rsa mistakes, rsa security, greatest common divisor, gcd, euclids algorithm, gcd rsa, break cipher, rsa hacking

Using the greatest common divisor (GCD) to factorize the public modulo into the secret primes, so we can forge a RSA signature.

Source for the rhme2 challenges:


How asymmetric (public key) encryption worksHow asymmetric (public key) encryption works
00:03:19September 11, 2013, 2:25 pm
How asymmetric (public key) encryption works

Channel: Veet Vivarto & Total View: 189898

Add Date: September 11, 2013, 2:25 pm & Duration: 00:03:19

Likes: 1291 | Dislike: 131


GNU Privacy Guard (Software), encryption, Public-key Cryptography, asymmetric, Computer Science (Field Of Study) email privacy, Privacy Everywhere, email and computer privacy software is now

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,

What Is Public Key Cryptography (PKC) Full Explain In Hindi For O level Exam

Channel: TechVideo Guru & Total View: 58198

Add Date: December 31, 2016, 2:25 am & Duration: 00:05:13

Likes: 352 | Dislike: 198


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What Is Public Key Cryptography?
What is encryption

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00:32:28February 19, 2018, 11:46 am

Channel: Sundeep Saradhi Kanthety & Total View: 4400

Add Date: February 19, 2018, 11:46 am & Duration: 00:32:28

Likes: 61 | Dislike: 0


sundeep, saradhi, kanthety, network security, access control, authentication, authorization, confidentiality, integrity, non-repudiation, unauthorized access, third party, security services, mechanisms, encryption, decryption, attacks, cryptography, sender, receiver, secure transmission, computer network, computer security, data security, KEY DISTRIBUTION, key management, private key, public announcement, certificate authority, time stamp, nonce, digital certificates, certificates

There are four ways to distribute the public keys among the users.
1) Public Announcement
2) Public Key Directory
3) Public Key Authority
4) Certificate Authority

What is PKI (Public Key Infrastructure)?What is PKI (Public Key Infrastructure)?
00:01:37February 23, 2017, 10:23 am
What is PKI (Public Key Infrastructure)?

Channel: Gemalto Security & Total View: 8695

Add Date: February 23, 2017, 10:23 am & Duration: 00:01:37

Likes: 27 | Dislike: 2


PKI security, What is PKI, What is PKI certificate, pki certificate, public key infrastructure, pki explained, pki infrastructure, pki public key infrastructure, pki cryptography, pki management, pki, gemalto pki, safenet pki, gemalto public key infrastructure, safenet public key infrastructure

What is PKI (Public Key Infrastructure)?
Discover what you need to know about the level of security PKI provides, how easy it is to implement and how convenient it is for users.

Public key infrastructures (PKIs) are relied upon to secure a broad range of digital applications, validating everything from transactions and identities to supply chains. However, infrastructure vulnerabilities represent a significant risk to the organizations that rely on PKI alone to safeguard digital applications.

Gemalto offers PKI encryption key management solutions to help you protect the keys at the heart of PKI as well as PKI-based authentication tokens that leverage the security benefits offered by PKI to deliver dependable identity protection

Watch and learn how PKI can benefit you and your organization.
Our solutions:

Symmetric vs Asymmetric ( public key ) Cryptography

Channel: Hacks And Security & Total View: 31625

Add Date: April 19, 2017, 8:58 pm & Duration: 00:19:32

Likes: 552 | Dislike: 14


symmetric, asymmetric, key, public, encryption, cryptography, advantages

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
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Public Key Infrastructure Fundamentals - Bart Preneel

Channel: & Total View: 49359

Add Date: July 11, 2013, 10:52 am & Duration: 01:31:53

Likes: 130 | Dislike: 5


Public Key infrastructure, Bart Preneel, Computer science, Cryptology, software, software security, Computer Security (Industry), cryptography, kuleuven, secappdev, secure application development, PKI, asymmetric cryptography, asymmetric key pair, asymmetric key encryption, asymmetric encryption, digital signature, public key, private key, certificate authority, key architectures, digitally signed certificate, certificate revocation list, CRL, online certificate status protocol, OCSP

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...

Distributing Public Keys with Public Key Authority (CSS441, L20, Y15)

Channel: Steven Gordon & Total View: 3554

Add Date: April 23, 2016, 11:35 pm & Duration: 00:29:56

Likes: 20 | Dislike: 0

Using a public key authority to distribute public keys. Course material via:

Blockchain/Bitcoin for beginners 8: Bitcoin addresses, public key hash, P2PKH transactions

Channel: Matt Thomas & Total View: 9068

Add Date: September 30, 2016, 10:00 pm & Duration: 00:23:28

Likes: 136 | Dislike: 5


P2PKH, Bitcoin, blockchain, tutorial, how to, begineer, screencast, SHA258, base 58 check, checksum

Before we delve into the inner workings of a bitcoin transaction I wanted to explain how the actual bitcoin address is derived from the public key which in turn is derived from the private key.

I take through step by step all the steps required to derived the checksums etc and show with a real example of a real bitcoin transaction.

Also discuss why checksums are included in Bitcoin addresses in order to eliminate the possibility of characters being corrupted, or modified in transit.

This is the cool tool for converted from base 58 encoded value to hex value.

Good link talking about base 58 encoding.

Unplugged: The show. Part 9: Public key encryptionUnplugged: The show. Part 9: Public key encryption
00:04:23October 24, 2008, 6:19 pm
Unplugged: The show. Part 9: Public key encryption

Channel: csunplugged & Total View: 31308

Add Date: October 24, 2008, 6:19 pm & Duration: 00:04:23

Likes: 53 | Dislike: 4


Computer, Science, education

This video shows an entertaining way to introduce Computer Science to school students.

For the next part, see

For the first part in the series, see

The full show is available in one clip at

For more information, see

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