Browse free open source C Cryptography Software and projects below. Use the toggles on the left to filter open source C Cryptography Software by OS, license, language, programming language, and project status.

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  • 1
    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.
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    Downloads: 767 This Week
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  • 2
    Msieve is a C library implementing a suite of algorithms to factor large integers. It contains an implementation of the SIQS and GNFS algorithms; the latter has helped complete some of the largest public factorizations known
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    Downloads: 70 This Week
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  • 3

    The ASN.1 Compiler

    Go to github.com/vlm/asn1c for the latest version.

    This ASN.1 compiler turns ASN.1 specifications into C code. The asn1c is shipped together with conformant BER/DER/XER/PER codecs. The X.509, GSM TAP3, MEGACO, RRC and LDAP encoding and decoding examples are part of the source code distribution. NOTE: THE asn1c PROJECT HAS LARGELY MOVED TO GITHUB: http://github.com/vlm/asn1c
    Downloads: 4 This Week
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  • 4
    The goal of Operation Project X is to crack the 2048-bit RSA private encryption key Microsoft uses to sign Xbox media, by using distributed computing. This key could be used by Xbox owners to run homebrew code on their machines.
    Downloads: 2 This Week
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  • 5

    SHA256-in-C

    SHA-256 Algorithm Implementation in C

    Downloads: 1 This Week
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  • 6
    Alkindus is an automated solver for short monoalphabetic substitution ciphers without word divisions.
    Downloads: 0 This Week
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  • 7
    BruteNet is a system of the distributed brute force and distributed calculations built on user extensions capable to solve a great number of problems related to the partition on a lot of machines.With sample extention you can distribute brute md5-hash
    Downloads: 0 This Week
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  • 8
    A project to provide a GUI toolkit to facilitate (and where possible, automate) the breaking of classical (pen-and-paper) cryptosystems. Initial focus is on the cryptanalysis of monoalphabetic substitution ciphers.
    Downloads: 0 This Week
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  • 9
    A collection of small utilities with a connection to cryptography and cryptanalysis. Written for efficiency and a small memory footprint.
    Downloads: 0 This Week
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  • 10
    This is a project that simulates the German Military Enigma machine during WWII.. It is a project for beginers to learn to program and to meet people. If anyone is interested in helping, please email me @ dustin@rockhill.org
    Downloads: 0 This Week
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  • 11

    GDLOG

    Implementation of the GNFS for discrete logarithm problem in GF(p)

    GDLOG is an implementation of the General Number Field Sieve algorithm for discrete logarithm problem in GF(p).
    Downloads: 0 This Week
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  • 12
    GILIB

    GILIB

    GILIB Large Integer Arithmetic Library

    A large integer arithmetic library written in plain C.
    Downloads: 0 This Week
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  • 13
    Hardware random number generator based on oscillator jitter
    Downloads: 0 This Week
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  • 14
    LavaRnd is a random number generator that converts a digitized chaotic source (such as a lens capped web camera) into cryptographically strong random numbers. LavaRnd comes with both an APIs (currently C and Perl) as well as a number of demos.
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    Downloads: 0 This Week
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  • 15
    LightCrypto is C cryptography library. It contains Big Number Library, basic crypto algorithms (3DES, DSA, RSA, ECDSA, etc), Internet Voting Scheme, and many more. Current librarie's binary is less than 1MB and it can even be smaller by user config.
    Downloads: 0 This Week
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  • 16
    Minarke Is Not A Real Kriegsmarine Enigma But it will allow you to communicate with one. Command line enigma machine emulator. Full M4 compatability, can be used to decode WWII U-boat messages, or send your own.
    Downloads: 0 This Week
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  • 17
    MpNT is a multi-precision number theory library that provides a base for building cryptographic applications. It may however be used in any domain where efficient integer, modular, and floating-point computations involving large numbers are required.
    Downloads: 0 This Week
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  • 18
    RSA-IP is a Linux kernel net _protocol_ which encrypts IPv[4;6] using RSA public/private key.Think of it as a kernel level implementation of ssl. RSA needs prime number so we release a prime searcher.
    Downloads: 0 This Week
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  • 19
    Real-Time Proactive Secret Sharing Library for RTAI is an implementation of the Shamir's secret sharing scheme and Herzberg's proactive secret sharing algorithm. The library uses a port of GNU GMP in order to make multiple precision arithmetic operatio
    Downloads: 0 This Week
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  • 20
    The aim of this project is to collect and develop high quality pseudo random number generator (s) and to develop methods for testing suspected random sequences.
    Downloads: 0 This Week
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  • 21
    Al2 is a language, close to C++ and Java, designed for use in mathematics and science, but is procedural unlike Mathematica and Maple. Like C++, class operators can be defined. Like Java, there is no need for header files. Aled is an interface to AL2.
    Downloads: 0 This Week
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  • 22

    chameleon_14443

    Low-cost, ISO 14443 compliant emulator for contactless smartcards

    ! This website is discontinued ! The new, improved MiniChameleon is maintained as of January 2014 on github: https://github.com/emsec/ChameleonMini ATXmega based emulator for contactless smartcards, designed and maintained by Embedded Security Group at the Ruhr-University in Bochum.
    Downloads: 0 This Week
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