Cryptography Open Source Projects

Bitcoin Core integration/staging tree

Reference implementation of Anoma

General purpose TLS and crypto library

An open source cybersecurity protocol for syncing decentralized graph data.

A powerful obfuscator for JavaScript and Node.js

Cryptomator for Windows, macOS, and Linux: Secure client-side encryption for your cloud storage, ensuring privacy and control over your data.

Zama Bounty Program: Contribute to the FHE space and Zama's open source libraries and get rewarded 💰

⚡ Automatically decrypt encryptions without knowing the key or cipher, decode encodings, and crack hashes ⚡

A modern, portable, easy to use crypto library.

A Stable & Secure Tunnel based on KCP with N:M multiplexing and FEC. Available for ARM, MIPS, 386 and AMD64。N:M 多重化と FEC を備えた KCP に基づく安定した安全なトンネル。 N:M 다중화 및 FEC를 사용하는 KCP 기반의 안정적이고 안전한 터널입니다. Un tunnel stable et sécurisé basé sur KCP avec multiplexage N:M et FEC.

Tink is a multi-language, cross-platform, open source library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse.

Monero: the secure, private, untraceable cryptocurrency

CryptoSwift is a growing collection of standard and secure cryptographic algorithms implemented in Swift

Perform data science on data that remains in someone else's server

A minimalist, open source online pastebin where the server has zero knowledge of pasted data. Data is encrypted/decrypted in the browser using 256 bits AES.

Lightning Network Daemon ⚡️

cryptography is a package designed to expose cryptographic primitives and recipes to Python developers.

Modular ZK(Zero Knowledge) backend accelerated by GPU

A modern TLS library in Rust

Awesome Books

A curated list of cryptography resources and links.

RSA attack tool (mainly for ctf) - retrieve private key from weak public key and/or uncipher data

Upspin: A framework for naming everyone's everything.

⟁ Tendermint Core (BFT Consensus) in Go

A curated list of awesome infosec courses and training resources.

free C++ class library of cryptographic schemes

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

A native implementation of TLS in Javascript and tools to write crypto-based and network-heavy webapps

Decentralized cryptocurrency blockchain daemon implementing the XRP Ledger protocol in C++

Minimal implementation of the Mimblewimble protocol.

An implementation of the TLS/SSL protocols

A crypto-secure Reliable-UDP library for Golang with FEC support.

A Decentralized Operating System for ZK Applications

Apache Shiro is a powerful and easy-to-use Java security framework that performs authentication, authorization, cryptography, and session management

🧰 A zero trust swiss army knife for working with X509, OAuth, JWT, OATH OTP, etc.

🛡 I2P: End-to-End encrypted and anonymous Internet

End-To-End is a crypto library to encrypt, decrypt, digital sign, and verify signed messages (implementing OpenPGP)

An experiment.

Microsoft SEAL is an easy-to-use and powerful homomorphic encryption library.

Portable OpenSSH

Hide secrets with invisible characters in plain text securely using passwords 🧙🏻‍♂️⭐

Practical Cryptography for Developers: Hashes, MAC, Key Derivation, DHKE, Symmetric and Asymmetric Ciphers, Public Key Cryptosystems, RSA, Elliptic Curves, ECC, secp256k1, ECDH, ECIES, Digital Signatures, ECDSA, EdDSA

Crypto 101, the introductory book on cryptography.

Homomorphic Encryption demos

A curated list of awesome networking libraries, resources and shiny things

CAUTION: END OF SUPPORT ON 3 JUN 2026. The 'jsrsasign' (RSA-Sign JavaScript Library) is an opensource free cryptography library supporting RSA/RSAPSS/ECDSA/DSA signing/validation, ASN.1, PKCS#1/5/8 private/public key, X.509 certificate, CRL, OCSP, CMS SignedData, TimeStamp, CAdES and JSON Web Signature/Token in pure JavaScript.

[mirror] Go supplementary cryptography libraries

Cryptography Toolkit

A self-contained cryptographic library for Python

HElib is an open-source software library that implements homomorphic encryption. It supports the BGV scheme with bootstrapping and the Approximate Number CKKS scheme. HElib also includes optimizations for efficient homomorphic evaluation, focusing on effective use of ciphertext packing techniques and on the Gentry-Halevi-Smart optimizations.

Project Wycheproof tests crypto libraries against known attacks.

C library for prototyping and experimenting with quantum-resistant cryptography

A modern, open source password manager for individuals and teams.

yubikey-agent is a seamless ssh-agent for YubiKeys.

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! Update to wolfSSL 5.9.1 for the latest CVE fixes.

Collect libraries and packages about blockchain/cryptography in Rust

Collection of resources spanning key areas of Computer Science

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

Software sandbox for storage of sensitive information in memory.

Declare your digital independence