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Cryptography

Cryptography, or cryptology is the practice and study of techniques for secure communication in the presence of adversarial behavior. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages.

Here are 974 public repositories matching this topic...

openssl / openssl

TLS/SSL and crypto library

tls ssl cryptography encryption openssl decryption

Updated Nov 6, 2025
C

jedisct1 / libsodium

A modern, portable, easy to use crypto library.

c cryptography crypto zig-package

Updated Nov 3, 2025
C

cjdelisle / cjdns

An encrypted IPv6 network using public-key cryptography for address allocation and a distributed hash table for routing.

cryptography networking mesh-networks routing dht mesh cjdns fcp hyperboria

Updated Oct 5, 2025
C

aws / s2n-tls

An implementation of the TLS/SSL protocols

c tls ssl cryptography crypto encryption c99 s2n

Updated Nov 7, 2025
C

openssh / openssh-portable

Portable OpenSSH

c security cryptography login keychain file-sharing

Updated Nov 7, 2025
C

Legrandin / pycryptodome

A self-contained cryptographic library for Python

python security cryptography

Updated Jun 21, 2025
C

wolfSSL / wolfssl

The wolfSSL library is a small, fast, portable implementation of TLS/SSL for embedded devices to the cloud. wolfSSL supports up to TLS 1.3 and DTLS 1.3!

Updated Nov 7, 2025
C

open-quantum-safe / liboqs

C library for prototyping and experimenting with quantum-resistant cryptography

cryptography post-quantum-cryptography key-exchange-algorithms lattice-based-crypto

Updated Nov 6, 2025
C

TokTok / c-toxcore

The future of online communications.

security cryptography encryption network p2p toxcore

Updated Nov 7, 2025
C

jedisct1 / minisign

A dead simple tool to sign files and verify digital signatures.

cryptography crypto pgp gpg ed25519 signatures zig-package

Updated Oct 26, 2025
C

themis

cossacklabs / themis

Easy to use cryptographic framework for data protection: secure messaging with forward secrecy and secure data storage. Has unified APIs across 14 platforms.

Updated Jul 16, 2025
C

libtom / libtomcrypt

LibTomCrypt is a fairly comprehensive, modular and portable cryptographic toolkit that provides developers with a vast array of well known published block ciphers, one-way hash functions, chaining modes, pseudo-random number generators, public key cryptography and a plethora of other routines.

c cryptography encryption libtomcrypt

Updated Nov 3, 2025
C

trezor-firmware

trezor / trezor-firmware

🔒 Trezor Firmware Monorepo

python c rust cryptography bitcoin firmware micropython cryptocurrency trezor wallet

Updated Nov 7, 2025
C

libressl / portable

LibreSSL Portable itself. This includes the build scaffold and compatibility layer that builds portable LibreSSL from the OpenBSD source code. Pull requests or patches sent to tech@openbsd.org are welcome.

c tls ssl security cryptography openbsd openssl libressl

Updated Oct 30, 2025
C

Tongsuo

Tongsuo-Project / Tongsuo

铜锁/Tongsuo is a Modern Cryptographic Primitives and Protocols Library

tls security cryptography pki chinese-ciphers

Updated Oct 29, 2025
C

pyca / pynacl

Python binding to the Networking and Cryptography (NaCl) library

python cryptography libsodium nacl

Updated Oct 27, 2025
C

pq-crystals / kyber

cryptography crypto post-quantum-cryptography key-exchange-algorithms lattice-based-crypto post-quantum module-lattices

Updated Feb 16, 2025
C

ryancdotorg / brainflayer

A proof-of-concept cracker for cryptocurrency brainwallets and other low entropy key algorithms.

cryptography bitcoin ethereum brainwallet password-cracker secp256k1

Updated May 16, 2024
C

e-ago / bitcracker

BitCracker is the first open source password cracking tool for memory units encrypted with BitLocker

microsoft windows cryptography attack gpu opencl cuda hash gpgpu passwords cracking john-the-ripper bitlocker password-cracker decryption-algorithm bitcracker

Updated May 31, 2024
C

PQClean / PQClean

Clean, portable, tested implementations of post-quantum cryptography

c cryptography post-quantum-cryptography post-quantum pqcrypto implementations pqc

Updated Apr 14, 2025
C

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Website: github.com/topics/cryptography
Wikipedia: Wikipedia