In this video you will see how to encrypt and decrypt the text information using the RSA algorithm in Java Cryptography.
For more tutorials visit: http://www.step2know.com

Views: 24298
Amarnath R

In this video you will see how to encrypt and decrypt the text information using the AES algorithm in Java Cryptography.
For more tutorials visit: http://www.step2know.com

Views: 52159
Amarnath R

We will create a primitive encryption algorithm and apply it to a String and a file.
P.S. I'm now using earphones' mic rather than the built-in laptop mic because of my (loud) surroundings. Let me know what you think.

Views: 6562
Almas Baimagambetov

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:
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Views: 249753
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: 496476
itfreetraining

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Views: 5193
Quick Trixx

This video is about asymmetric key cryptography; an extremely important aspect of computer science and cyber security. It covers the fundamental principles of asymmetric key cryptography, including the use of a public encryption key and a private decryption key. It explains that this concept is behind the RSA algorithm, something that is essential for secure communications over the Internet.

Views: 265
Computer Science

Website + download source code @ http://www.zaneacademy.com | typo in server display corrected here https://youtu.be/6C5sq5TaVMs?t=90
00:08 demo prebuilt version of the application
04:20 what discrete logarithm problem(s) does Eve need to solve
[typo correction in server console] s(congruent)B^a mod p
[typo correction in server console] s(congruent)A^b mod p
05:00 quick intro to Diffie Hellman Key Exchange (DHKE)
06:00 what is a group
7:30 what is a cyclic group
7:50 what is a group generator
09:08 DHKE proof
10:12 what is the Discrete Logarithm Problem
10:51 what is the Diffie Hellman Problem
11:55 what is the generalized discrete logarithm problem
12:55 why 1 and p-1 are not included when picking the secret keys for both parties
14:30 start coding the application
17:35 coding the server side
22:25 coding the client side
26:54 initializing the domain params p and alpha
27:58 calculating the public key
28:45 calculating the common key
29:56 test running the application
[typo correction in server console] s (congruent) B^a mod p
[typo correction in server console] s (congruent) A^b mod p

Views: 1910
zaneacademy

Mansi Sheth, Security Researcher, Veracode Inc
Are you overwhelmed by the overabundance of choices provided by the Java Cryptography API when choosing an encryption algorithm? Are you on top of all the latest happenings in cryptographic communities and know which cryptographic primitives can be broken and how? Due to time constraints, do you find yourself copy/pasting from the internet, hoping and praying that it’s secured? If any of your answers are “yes,” come to this session. It goes over all cryptographic primitive: RNGs, encryption/decryption algorithms, HMACs, and so on. The presentation points out areas that require careful attention, helps you make correct algorithmic and keying material choices, and provides plenty of code examples showing correct and incorrect usages.

Views: 2532
Java

+++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: 32671
Packethacks.com

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Password Encryption.java
JAVA ENCRYPTION/DECRYPTION PROGRAM HELP
Encrypting and Decrypting Java
Cryptography using Java in Netbeans IDE
Cryptography using Java in Netbeans IDE
Java Cryptography APIs
Cryptography
Encrypting and Decrypting a text file in java

Views: 104900
ProgrammingKnowledge

This tutorial explains how to encrypt and decrypt text using private and public key encryption, also known as asymmetric encryption.

Views: 1564
ma academy

Website + download source code @ http://www.zaneacademy.com
00:05 demo prebuilt version of the application
05:55 'Passive Eve' options for decrypting messages
07:43 Elgamal encryption summary & proof
11:20 code the application
27:11 test run the application

Views: 338
zaneacademy

So you're logging in to your favorite crypto currency exchange over https using a username and password, executing some transactions, and you're not at all surprised that, security wise, everything's hunky dory...
In order to appreciate and understand what goes on under the hood, as a developer, it's really important to dive into the key concepts of cryptography .
In this session, we'll go back to JCA (Java Cryptography API) en JCE (Java Cryptography Extensions) basics, like message digests, symmetric and asymmetric encryption, and digital signatures, and see how they're used in a variety of examples like https and certificates, salted password checking, and block chain technology.
After this session, you'll have a better understanding of Java Cryptography APIs and their applications.

Views: 1049
Jfokus

A small example of using the RSA algorithm to encrypt and decrypt a message.

Views: 18065
David Metzler

Digital Signature - Asymmetric Key Cryptography, Why used for Authentication and Non Repudiation (Hindi)
Keywords:
Digital Signature
Asymmetric Encryption
Authentication
Non Repudiation

Views: 86482
Easy Engineering Classes

RSA Digital Signature JAVA Tutorial, Including Intro to Extended Euclidean Algorithm, Euler phi function, RSA generate keys, sign, and verify | Website + download source code @ http://www.zaneacademy.com | Public Key Cryptography w/ JAVA (tutorial 02) - RSA @ https://youtu.be/mddJvoloGy0
00:08 demo prebuilt version of the application
06:00 what is message confidentiality
06:18 what is message autheticity
06:38 what is message integrity
07:10 RSA digital signature
08:18 what is the Extended Euclidean Algorithm
08:56 what is the Euler Phi function
12:10 how to encrypt & decrypt with RSA
12:20 How to sign & verify with RSA
13:16 code the application
30:22 test run the application

Views: 410
zaneacademy

Github link: https://github.com/MatthewCLind/Crypto_Practice

Views: 5084
Matthew Lind

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: 10827
Stuart Williams

This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459

Views: 62086
Udacity

Java Code for RSA Encryption and Decryption

Views: 21942
Natarajan Meghanathan

So you're logging in to your favorite crypto currency exchange over https using a username and password, executing some transactions, and you're not at all surprised that, security wise, everything's hunky dory...
The amount of cryptography to make all this happen is staggering. In order to appreciate and understand what goes on under the hood, as a developer, it's really important to dive into the key concepts of cryptography .
In this session, we discover what cryptography actually is, and will use the JCA (Java Cryptography API) en JCE (Java Cryptography Extensions) in the JDK to explain and demo key concepts such as:
Message digests (hashing)
Encryption, both symmetric and asymmetric
Digital signatures, both symmetric and asymmetric
Furthermore, we'll show how these concepts find their way into a variety of practical applications such as:
https and certificates
salted password checking
block chain technology
After this session, you'll have a better understanding of basic cryptography, its applications, and how to use the cryptography APIs in Java.

Views: 132
Devoxx

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: 2604
PKIIndia

https://8gwifi.org
Ciphers in Java
five confidentiality modes of operation for symmetric key block cipher algorithms
The Electronic Codebook Mode (ECB)
The Cipher Block Chaining Mode (CBC)
The Cipher Feedback Mode (CFB)
The Output Feedback Mode (OFB)
The Counter Mode (CT)
Symmetric encryption example with padding and CBC using DES
Basic symmetric encryption example with padding
using the KeyGenerator

Views: 5586
Zariga Tongy

Public Key Cryptography w/ JAVA (tutorial 03) - DHKE w/ Encryption | Website + download source code @ http://www.zaneacademy.com

Views: 356
zaneacademy

Download Code:
https://www.dropbox.com/s/7wzs7g0c51jcb84/symmetric%20Encryption.cpp?dl=0
In this video you will learn,
How to code symmetric Encryption and Decryption Program with C++.
1. all you need to have a compiler in my case i'm using DevC++.
2. on each change you must compile the whole program before execute it.
3. Don't forget to subscribe to my channel.
for any question post comment or email me:
[email protected]

Views: 2483
Khaliq Izrail Haxor

Website + download source code @ http://www.zaneacademy.com | also see Public Key Cryptography w/ JAVA (tutorial 04) - RSA Digital Signature @ https://youtu.be/5MxeckDiC18
00:10 demo prebuilt version of the application
03:15 how can a passive eavesdropper decrypt messages
04:20 how to compute inverse modulo of an integer using extended euclidean algorithm (EEA)
05:25 what is the Euler phi function
07:55 building a prime factorization crypto system
10:38 how to encrypt with RSA
11:00 how to decrypt with RSA
11:21 coding the application
14:12 code the server side
17:48 code the client side
18:56 calculate the private key d
19:12 calculate phi
19:26 generate the public key
22:30 handle receiving the public key of the other client
22:44 handle receiving messages from the other client
25:37 test run the application

Views: 984
zaneacademy

Source Code Project http://microify.com/1Tgn

Views: 3725
Melardev

Android Studio - Make Encrypt use Algorithm RSA (Rivest Shamir Adleman )
Source code :
http://www.mediafire.com/file/xottv6ip19z4f96/rsa.java

Views: 3496
KODETR

Both Symmetric and Asymmetric key method can be used to secure message. First the message is encrypted with a symmetric key and then before sending the key to other party the key itself is encrypted with other parties public key. The other party on receiving the encrypted message and encrypted key, first decrypts the key with private key and than decrypts the message by using the decrypted key.
To know more about Java security read http://www.java-redefined.com/2013/08/java-security.html

Views: 619
Java Developer

In this video lesson, you will learn to develop Encryption in JavaScript using CryptoJS library.
Donate & Support: https://www.verkkonet.com/downloads/donate.php?id=j32
To download the source code of Encryption in JavaScript:
https://verkkonet.com/downloads/index.php?id=j32

Views: 1625
VerkkoNet

Demo of Encrypting and Decrypting of properties at spring cloud config server and Decryption at spring cloud config client

Views: 4707
priya k

Learn how to control Java’s cryptographic features to protect your application and any data that you manage. This session explains what different cryptography features do, what threats are addressed by each feature, and where the configuration takes place. Topics include certificates, code signatures, authenticating dynamic JVM languages, TLS control, perfect forward security, and transparent JPA encryption.
Author:
Erik Costlow
Erik Costlow is a product manager in Oracle's Java Platform Group and a regular contributor to the Java Platform Group PM blog. Erik also works closely with industry on Oracle's Java Root Certificate Program to ensure highest program quality. Previously Erik was employed at HP where he influenced design of the Fortify security analysis suite used by software developers across the world.
View more trainings by Erik Costlow at https://www.parleys.com/author/erik-costlow
Find more related tutorials at https://www.parleys.com/category/developer-training-tutorials

Views: 11609
Oracle Developers

Learn to Encrypt and Decrypt data on Android Applications with the Advanced Encryption Standard (AES) Algorithm.
Note that this tutorial has been made by Tamil for the SSaurel's Channel. If you want to collaborate on the SSaurel's Channel, don't hesitate to send me your ideas for further details.
► Discover all the Android Apps offered by SSaurel Mobile Apps : https://play.google.com/store/apps/dev?id=6924401024188312025
► Learn to create Android Apps step by step on the SSaurel's Blog : https://www.ssaurel.com/blog
► Enter in the Bitcoin and cryptocurrency World : https://www.toutsurlebitcoin.fr

Views: 35417
Sylvain Saurel

Cryptography for Java Developers
Hashes, MAC, Key Derivation, Encrypting Passwords, Symmetric Ciphers & AES, Digital Signatures & ECDSA
About the Speaker
What is Cryptography?
Cryptography in Java – APIs and Libraries
Hashes, MAC Codes and Key Derivation (KDF)
Encrypting Passwords: from Plaintext to Argon2
Symmetric Encryption: AES (KDF + Block Modes + IV + MAC)
Digital Signatures, Elliptic Curves, ECDSA, EdDSA
Live demos and code examples: https://github.com/nakov/Java-Cryptography-Examples
Slides: https://www.slideshare.net/nakov/cryptography-for-java-developers-nakov-jprofessionals-jan-2019
Blog: https://nakov.com/blog/2019/01/26/cryptography-for-java-developers-nakov-at-jprofessionals-jan-2019/

Views: 337
Svetlin Nakov

شرح كامل للتشفير و فك التشفير وعمل المفتاح عن طريق شيفرة RSA بطريقة مبسطة مع حل مثال.
Information Security and Privacy - RSA Cipher Key Creation + Encyption + Decryption Fully Explained with Example.
- Saif Badran
iTeam Academic Group - JU
https://facebook.com/groups/iTeam.Ju

Views: 71896
iAcademy

RSA Cryptosystem Algorithm (Public Key Algorithm) in Hindi with Example
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Control System Complete Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnbvRNepz74GGafF-777qYw4

Views: 131153
Easy Engineering Classes

Thomas Shrimpton and Martijn Stam and Bogdan Warinschi, Crypto 2016. Original title: A Modular Treatment of Cryptographic APIs: The Symmetric-Key Case. See http://www.iacr.org/cryptodb/data/paper.php?pubkey=27679

Views: 884
TheIACR

This video show you how to use previously written AES algorithm code to encrypt and decrypt the text.

Views: 29776
Amarnath R

https://8gwifi.org/CipherFunctions.jsp
Reference book: http://leanpub.com/crypto
Computer Security, Cryptography Advanced Encryption Standard AES,fips 197
The Advanced Encryption Standard (AES) specifies a FIPS-approved
cryptographic algorithm that can be used to protect electronic data. The AES algorithm is a symmetric block cipher that can encrypt (encipher) and decrypt (decipher) information. Encryption converts data to an unintelligible form called ciphertext; decrypting the ciphertext converts the data back into its original form, called plaintext.
The AES algorithm is capable of using cryptographic keys of 128, 192, and 256 bits to encrypt and decrypt data in blocks of 128 bits.
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aes encryption explained,
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aes algorithm lecture,
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aes encryption and decryption algorithm

Views: 156806
Zariga Tongy

Overview of symmetric key encryption, with a demonstration of using GPG to perform symmetric key encryption on the command line.

Views: 728
Mike Murphy

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: 66492
Steven Gordon

RSA is an algorithm used by modern computers to encrypt and decrypt messages. Modern ecnryption is mostly based on this algorithm.
It is an asymmetric cryptographic algorithm.
Asymmetric means that there are two different keys. This is also called public key cryptography, because one of the keys can be given to anyone. The other key must be kept private.
The algorithm is based on the fact that finding the factors of a large composite number is difficult: when the integers are prime numbers, the problem is called prime factorization. It is also a key pair (public and private key) generator.
Website - http://dprogrammer.org
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Google+ - https://plus.google.com/u/0/106892447370946095732

Views: 379
dProgrammer lopez

Learn how to do encryption and decryption in Node.js.

Views: 954
DevNami

How to Encrypt and Decrypt a String in C#. The C# Basics beginner course is a free C# Tutorial Series that helps beginning programmers learn the basics of the C# Programming Language. This is the best way to Learn C# for beginners
Encrypt your passwords with MD5 hashing in C#
C# Salting & Hashing Passwords
C# encrypting and decrypting using AES CBC, safe storing the encrypted data
visual C# Adding AES encryption to C# application Forms Application
encryption encrypt- decrypt with AES using C# Forms Application
Advanced Encryption Standard Rijndael cipher Forms Application
C# - Simple AES encryption using Visual C# cryptographic
encrypt my 128 bit string using AES encryption cryptography C#

Views: 40316
Fox Learn

This is the first in a series about cryptography; an extremely important aspect of computer science and cyber security. It introduces symmetric key cryptography with a well known substitution cipher, namely the Caesar Cipher. It includes a few examples you can try for yourself using different encryption keys.

Views: 595
Computer Science