Crack legacy zip encryption with Biham and Kocher's known plaintext attack.

Go implementation of the Data At Rest Encryption (DARE) format.

One-time encrypted password/secret sharing

Scripts that illustrate basic cryptography concepts based on Coursera Standford Cryptography I course and more.

Tool and library for cracking legacy zip files.

AES cryptographic library for .NET Framework and .NET Core

Two scripts in Python to encrypt/decrypt using the 128 bits AES algorithm, ECB mode with hex "00" as padding for each character. For the encryption, an ascii plaintext file is taken as the input, then an encrypted hex file is outputted. For the decryption, a ciphertext hex file is taken as the input, then a decrypted ascii file is outputted.

Example of AWS Key Management Service encrypt/decrypt in ruby

Cryptanalysis library for breaking classical ciphers

Twin-Hex Cipher Encoder/Decoder

Decode / Bruteforce Vigenere cipher text just using the Flag Format!!

Network Engineer/System Administrator automation tool for executing remote commands on multiple devices/hosts via SSH.

Python cracker for many time pad (multiple one time pad messages)

Given a plaintext and key, this will compute the corresponding DES ciphertext.

A comprehensive collection of various conversion tools for text manipulation, encoding, and cryptography.

A wrapper around the built-in crypto module that makes encryption easy in Node.js.

crypto; from kruptein to hide or conceal

An OpenCL implementation of most common ciphers

A python code that performs a Vigenere cipher. Do both encryption of a plain text or decryption for a cipher text. in Vigenere cipher the key used in encryption or decryption is a single word and the message contains characters only.

Simplified Data Encryption Standard (S-DES) is a simple version of the DES Algorithm. It is a block cipher that takes a block of plain text and converts it into ciphertext. It takes a block of 8 bit. It is a symmetric key cipher, they use the same key for both encryption and decryption. We take a random 10-bit key and produce two 8-bit keys.