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Installation: | pip install pydes |
Author: | Todd Whiteman |
Issue Date: | 28th April, 2010 |
Version: | 2.0.1 |
Compatibility: | Works in both Python 2, Python 3. |
License: | MIT License |
Source code: | GitHub: pyDes |
So I decided to enhance my python skills in encryption and decryption, and attempted to write a python program that executes the following: Generates a 1024 bit private key and public key Encrypt the private key with the DES algorithm. Jan 16, 2012 After coding RC4, I thought it was time to face a more difficult challenge: DES (Data Encryption Standard).Although it has been replaced by AES (Advanced Encryption Standard) more than a decade ago, it still has some appeal to me because it was the first symmetric algorithm I learned (and also because its creation, 40 years ago, was surrounded by mystery).
Installation
Using the Python package manager:
Or, for manual installation
Extract the files from the downloaded archive and run: To test, run:Usage
Docs and Examples
About pyDES
This is a pure python implementation of the DES encryption algorithm. It is in pure python to avoid portability issues, since most DES implementations are programmed in C (for performance reasons).
Triple DES class is also implemented, utilizing the DES base. Triple DES is either DES-EDE3 with a 24 byte key, or DES-EDE2 with a 16 byte key. See the 'About triple DES' section below more info on this algorithm.
The code below is not written for speed or performance, so not for those needing a fast DES implementation, but rather a handy portable solution ideal for small usage. It takes my Linux (circa 2015) machine 1 second per 20Kb to encrypt or decrypt using the DES method. That's SLOW!!
![Des Key Generation Code In Python Des Key Generation Code In Python](/uploads/1/2/6/1/126141566/219624466.gif)
About triple DES
Triple DES is just running the DES algorithm 3 times over the data with the specified key. The supplied key is split up into 3 parts, each part being 8 bytes long (the mandatory key size for DES).
The triple DES algorithm uses the DES-EDE3 method when a 24 byte key is supplied. This means there are three DES operations in the sequence encrypt-decrypt-encrypt with the three different keys. The first key will be bytes 1 to 8, the second key bytes 9 to 16 and the third key bytes 17 to 24.
If a 16 byte key is supplied instead, the triple DES method used will be DES-EDE2. This means there are three DES operations in the sequence encrypt-decrypt-encrypt, but the first and third operations use the same key. The first/third key will be bytes 1 to 8 and the second key bytes 9 to 16.
Credits
Thanks go to:
- David Broadwell for his ideas, comments and suggestions.
- Mario Wolff for finding errors in triple des CBC.
- Santiago Palladino for enlightening me on the PKCS5 padding technique.
- Shaya for correcting the PAD_PKCS5 triple des CBC errors.
- Yoav Aner for spotting a triple des CBC IV error.
Source
pyDes source code is released as MIT (free) and is available from GitHub: pyDes
Download
Download (Windows): pyDes-2.0.1.zip
Download (Unix): pyDes-2.0.1.tar.gz
Download (Unix): pyDes-2.0.1.tar.gz
Older pyDES versions
Download (Windows): pyDes-2.0.0.zip
Download (Unix): pyDes-2.0.0.tar.gz
Download (Unix): pyDes-2.0.0.tar.gz
Download (Windows): pyDes-1.3.1.zip
Download (Unix): pyDes-1.3.1.tar.gz
Download (Unix): pyDes-1.3.1.tar.gz
Download (Windows): pyDes-1.3.zip
Download (Unix): pyDes-1.3.tar.gz
Download (Unix): pyDes-1.3.tar.gz
Download (Windows): pyDes-1.2.zip
Download (Unix): pyDes-1.2.tar.gz
Download (Unix): pyDes-1.2.tar.gz
Download (Windows): pyDes-1.1.zip
Download (Unix): pyDes-1.1.tar.gz
Download (Unix): pyDes-1.1.tar.gz
Download (Windows): pyDes-1.0.zip
Download (Unix): pyDes-1.0.tar.gz
Download (Unix): pyDes-1.0.tar.gz
![Key Key](/uploads/1/2/6/1/126141566/162814414.png)
∟Introduction to DES Algorithm
∟DES Key Schedule (Round Keys Generation) Algorithm
This section describes DES (Data Encryption Standard) algorithm - A 16-round Feistel cipher with block size of 64 bits.
Key schedule algorithm:
DES key schedule supporting tables:
Key generator windows 8.1 download. Permuted Choice 1 - PC1:
Permuted Choice 2 - PC2:
Left shifts (number of bits to rotate) - r1, r2, .., r16:
Table of Contents
About This Book The sims cd key generator.
Cryptography Terminology
Cryptography Basic Concepts
Introduction to AES (Advanced Encryption Standard)
►Introduction to DES Algorithm
What Is Block Cipher?
DES (Data Encryption Standard) Cipher Algorithm
►DES Key Schedule (Round Keys Generation) Algorithm
DES Decryption Algorithm
DES Algorithm - Illustrated with Java Programs
DES Algorithm Java Implementation
DES Algorithm - Java Implementation in JDK JCE
DES Encryption Operation Modes
DES in Stream Cipher Modes
PHP Implementation of DES - mcrypt
Blowfish - 8-Byte Block Cipher
Secret Key Generation and Management
Cipher - Secret Key Encryption and Decryption
Introduction of RSA Algorithm
RSA Implementation using java.math.BigInteger Class
Introduction of DSA (Digital Signature Algorithm)
Java Default Implementation of DSA
Private key and Public Key Pair Generation
PKCS#8/X.509 Private/Public Encoding Standards
Cipher - Public Key Encryption and Decryption
MD5 Mesasge Digest Algorithm
SHA1 Mesasge Digest Algorithm
OpenSSL Introduction and Installation
OpenSSL Generating and Managing RSA Keys
OpenSSL Managing Certificates
OpenSSL Generating and Signing CSR
OpenSSL Validating Certificate Path
'keytool' and 'keystore' from JDK
'OpenSSL' Signing CSR Generated by 'keytool'
Des Key Generation Code In Python Free
Migrating Keys from 'keystore' to 'OpenSSL' Key Files
Certificate X.509 Standard and DER/PEM Formats
Migrating Keys from 'OpenSSL' Key Files to 'keystore'
Using Certificates in IE
Using Certificates in Google Chrome
Using Certificates in Firefox
Outdated Tutorials
References
Des Key Generation Code In Python Free
Windows 2008 activation key generator. Full Version in PDF/EPUB