Open Source Assembly Cryptography Software for Linux

VeraCrypt is a free disk encryption software brought to you by IDRIX (https://www.idrix.fr) and based on TrueCrypt 7.1a. It adds enhanced security to the algorithms used for system and partitions encryption making it immune to new developments in brute-force attacks. It also solves many vulnerabilities and security issues found in TrueCrypt. This enhanced security adds some delay ONLY to the opening of encrypted partitions without any performance impact to the application use phase. This is acceptable to the legitimate owner but it makes it much harder for an attacker to gain access to the encrypted data. All released files are PGP signed with key ID=0x680D16DE, available on key servers and downloadable at https://www.idrix.fr/VeraCrypt/VeraCrypt_PGP_public_key.asc VeraCrypt can mount TrueCrypt volumes. It also can convert them to VeraCrypt format. Documentation: https://www.veracrypt.fr/en/Documentation.html FAQ : https://www.veracrypt.fr/en/FAQ.html

mcrypt, and the accompanying libmcrypt, are intended to be replacements for the old Unix crypt, except that they are under the GPL and support an ever-wider range of algorithms and modes.

BeeCrypt is an ongoing project to provide a strong and fast cryptography toolkit. Includes entropy sources, random generators, block ciphers, hash functions, message authentication codes, multiprecision integer routines, and public key primitives.

Libecc is an Elliptic Curve Cryptography C++ library for fixed size keys in order to achieve a maximum speed. The goal of this project is to become the first free Open Source library providing the means to generate safe elliptic curves.

AVR128DA /Atmega128 microcontroller based open source EID smartcard with RSA (512-2048) and ECC (prime192v1, prime256v1, secp384r1, secp521r1 and secp256k1) support. Compatible with MyEID card from Aventra. Supported in windows and linux by opensc package. Allow about 64KiB space for keys/certificates. PKCS#15 structure supported. USB token with CCID interface based on xmega128a4u with same features as card. High speed AVR multiple precision arithmetic: squaring, multiplication, exponentiation.

Cryptography Tools is a project to develop demonstration tools on classic (currently Caesar and Playfair) & modern crypto-systems, including private & public key encryptions, digital signatures, cryptographic hashes and authenticated encryption.

This is an implementation of elliptic curve cryptography using the Montgomery and Edwards curves Curve25519, Ed25519, Ed448-Goldilocks and Curve448, using the Decaf / Ristretto encoding.

A package of Rijndael, Twofish and Serpent encryption algorithms implemented in x86 assembly. Meant to learn basics of assembly, learn about the algorithms or to be used in a C program.

This is a very powerfull criptography project that basicaly can be used to transmit or store secure data and study some cipher, hash and compression algorithms to understands how it works.

A library implementing the AES (American Encryption Standard) or Rijndael algorithms, intended to provide a neat packaged solution for other projects to use. Package includes C and Intel Pentium/MMX assembler versions of AES, along with an extensive

An original bruteforce-based encryption/decryption system. BBE was originally conceived to chat with encrypted text on IRC. mIRC and X-Chat support BBE via script addon. BBE can also encrypt MIME encoded files. Blowfish encryption is currently supported.

Derived from TrueCrypt 6.3 release, I added some command line options to "TrueCrypt Format.exe" to allow TrueCrypt volumes to be created without using the graphical user interface

The Cryptofon is designed to enable safe and secure communication trough a regular PSTN line. It supports narrowband connections (~2400 bit/s and lower).

Bouncer en localhost o lan, que permite capturar el trafico hacia un determinado canal de irc, cifrandolo con Rijndael, Serpent o Twofish. Y mostrando una salida por el canal en base64. Ideal para paranoicos.

The ELF-Encrypter program suite is a collection of programs to encrypt your ELF binaries using various algorithms. GnuPG is required in order to use some encryption techniques. The suite also contains programs to inject code into ELF binaries.

Optimized implementation of RC4 (Rivest Cipher 4, ARCFOUR) in ASM (x64) for Linux and Windows.

File Crypter is a Simple program, that is able to encrypt your files and decrypt them. A version of File Crypter is included as an example in the xCrypter Library and is called "ncrypter" which is short for "new crypter".

Note: I haven't even looked at this project for years. I was a pretty bad programmer back then, so the code is sloppy. The next version will be better. Similar to a stream cipher, but rather than performing an exclusive OR on the input bytes and cipher, it performs a mixture of 'rolling' (see x86 instruction ROR) and bit NOT operations according to the key.

K is a C++ library featuring Genetic Programming, cryptography, 64 bits arithmetic, cross-platform macros and unicode conversion routines. It compiles on NewtonOS, Mac < X, Unix and Windows and it makes little use of C++ templates.

The purpose of this project is to provide a biometric security solution by using voice print, fingerprint and/or facial recognition along with a password and/or smart card support using AES to protect data. Please read forums for if interested.

Small cryptographic command line tool for LINUX and OpenBSD (x86) completely in 32-Bit Assembly Language. ORDO encrypt/decrypt files (max. size 2 GB) with AES-128-Algorithm (Rijndael) in CBC-Mode (Cipher-Block-Chaining). No libs are included, only system-calls are used. ORDO is under BSD License.

Powerful 512bit pseudo random encryption, optimized for the x86-64 architecture. Coded in x86-64 assembly language, this has the potential to be one of the most powerful and fastest file encryption engines to date.

PROJECT HAS MOVED TO GITHUB: https://github.com/alex-georgiou/rc4-32.asm Code to brute force the 32-bit key used to RC4 encrypt .pwl files. Assembles to a 992 byte .COM file using the Intel Architecture Assembler v1.0 Copyright (c) 1998 augusto at dcc.ufmg.br. http://web.archive.org/web/19981205090800/http://www.dcc.ufmg.br/~augusto/project/iasm.zip

GPL hash functions with various ouput sizes.

Swift Crypto is a cross-platform, open-source implementation that mirrors a substantial portion of CryptoKit so server and Linux/Windows ARM64 apps can share one modern crypto API. It exposes high-level, misuse-resistant primitives with Swift ergonomics while delegating to well-vetted backends under the hood. The repository maintains active releases and issue tracking for enhancements like PEM handling and ecosystem compatibility. High-level, misuse-resistant primitives and key handling. SwiftPM distribution for easy inclusion in builds. By matching CryptoKit’s surface, it reduces portability friction between Apple platforms and server environments. The package slots cleanly into SwiftPM builds and is widely adopted across the Swift server ecosystem. Its goal is practical cryptography: safe defaults, clear APIs, and predictable performance.