Open Source C# Encryption Algorithms

Shadowsocks for Windows is a free and open source, high-performance secured socks5 proxy designed to protect your internet traffic. It allows you to surf the web privately and securely, and offers a number of useful features such as HTTP proxy support, system proxy configuration, server auto switching and plugin support. Shadowsocks is incredibly fast, as it utilizes bleeding edge techniques with Asynchronous I/O and event-driven programming. It also has a flexible industry-level encryption algorithm that supports custom algorithms. Shadowsocks for Windows requires a Microsoft .NET Framework 4.7.2 or higher, as well as Microsoft Visual C++ 2015 Redistributable (x86).

A pronounceable password generator plugin for KeePass. NOTE: This project has been discontinued. It hasn't been worth it to maintain the project for a while now, so no more updates will be made to the plugin. The algorithm this plugin uses is based off FIPS-181 which was withdrawn by NIST a while back. The proliferation of password managers that seamlessly run on multiple platforms (some of which are free) has also removed almost all advantages of using randomly generated pronounceable passwords. If you have a use case for this plugin, reconsider it. If you still think using randomly generated pronounceable passwords are worth it for your use case, reconsider it some more.

Aes 256 based - Lightweight, Extandeble and easy to use. But please keep in mind its still in early alpha and in development.

Secret Sharp is a wizard based GUI for the Shamir Secret Sharing Algorithm provided by the crypto++ API. Secret Sharp replicates the functionality that 'ssss' provides on unix.

The Alleged RC4 Cryptography Provider Class Library is a DLL file that includes an implementation of a well-known symmetric encryption algorithm that is not present in the System.Security.Cryptography namespace of the mscorlib library.

HashSum is a .NET port from GNU's md5sum and sha1sum. It supports: hash algorithm selection between MD5 and SHA1 (more could be added later) and compatibility between HashSum and GNU's checksum file format

Vijner 974 E-Sys (2048 bits and unlimited encryption). Enables easy (un-)encryption from text input or .txt file, and to (un-)encrypt raw files, with Vigenère Algorithm + unlimited encryption keys. Simple and powerful. Adapt to fit your needs.

ALIMP (A LIttle More Privacy) is a .NET C# software enabling users to easily cypher and de-cypher files on their computer using common algorithm (DES, 3DES, AES, ...) that are shipped with the .NET Frawemork.

If you need more security to send your messages, we introduce the new tool of Abdal security team called Abdal 2-Key Triple DES Builder. This tool can actually encrypt all your texts that are to be sent as a message between you and any person. Two-Key Triple DES is used to encrypt these messages. This algorithm performs 3 cryptographic processes on each block of information to reduce the penetration rate. The Abdal 2-Key Triple DES Builder tool has four modes for encrypting your data.

A library written in Visual C# for encrypting a text message into an image file, and decrypting an image file to get the text message using Rijndael Algorithm, RSA Algorithm, and LSB Substitution Algorithm.

DrCrypt, based on basic xor(exclusive or) encryption which is designed to be fast and reliable. Also DrCrypt supports 3 platform.(Java, .NET, Win32)

A library written in Java and C# for crypt,encrypt and generate key pairs using the ElGamal algorithm.

It is a simple password manager for your PC and Smartphone. It works like a text editor and uses a strong cryptography algorithm to generate the end file.

RC4.NET is a library that adds support for encrypting/decrypting using the symmetric RC4 algorithm in the .NET environment. The library is written in C# language, and performs equally well on both the Microsoft CLR and Mono platform.

This library provides two operations: one to wrap key data, and another to unwrap the key data. This code also includes a fairly comprehensive unit test library which ensures the implementation is verified against the vectors provided in RFC 3394.

If you're like me and you don't think your passwords are safe as cookies in your browser or any other place for that matter then this is the right app for you. TraySafe's minimalist UI is designed to be shown only in your system tray icons. With it you can copy both your username/email and password using only your left and right mouse buttons. The scroll button is used to delete items from the menu. PIN functionality is included in versions 1.1.0 and above. The serious perk of the app is that all the info is saved as encrypted data in the data.tsf file in the program directory. The simple yet effective encryption algorithm has a password hash, salt key and vigenère cipher key that are changed with every update. The only thing you have to do when updating is to delete the .tsf files and re-enter all your info again so that it can be encrypted using the new parameters. Detailed How-To can be found in the project wiki.

X-Crypt is a user friendly data encryption application. It allows you to encrypt sensitive data like credit card information into an unreadable format, this is done using a password, the more complicated the better. X-Crypt can encrypt whole files or just some text. The encryption algorithm is very complex and has guaranteed security.

XTEA (eXtended Tiny Encryption Algorithm) support for db4o open source object database. XTEA is a block cipher that operates on a 64-bit block size with a 128-bit key. An extremely tiny but very fast encryption algorithm (with cycles less than 32 rounds)

Light encryption algorithm (technique) that can be used in real time video encryption. (source code has been uploaded; You can read attached pdf file for more details about the presented encryption technique ! )

mFileBinder is an advanced file binder which binds multiple file of any type and merges into a single executable file. mFileBinder uses rijndael encryption algorithm to encrypt the file which can make Virus / Trojans Fully Undetectable. Set the drop location of all files and set the execution mode(Background,Foreground) of each file. Predefined set of ICON Package is included set your desired icon. Silently extracts and sequentially execute files.