Security tools, cryptography, and vulnerability research
2,616 repositories found
Command line interface for supplying proofs to the Nexus network.
Secure chat software for your computer.
This is the development repository for the OpenFHE library. The current development version is 1.5.0 (released on February 26, 2026). The current stable version is 1.4.2 (released on October 20, 2025).
The fastest way to identify anything!
FIDO Passkey for Raspberry Pico and ESP32
æternity blockchain - scalable blockchain for the people - smart contracts, state channels, names, tokens
Mundane is a Rust cryptography library backed by BoringSSL that is difficult to misuse, ergonomic, and performant (in that order).
Rust implementation of {t,n}-threshold ECDSA (elliptic curve digital signature algorithm).
Simple C++ Image Steganography tool to encrypt and hide files inside images using Least-Significant-Bit encoding.
A Rust implementation of the Noise Protocol Framework
Security Apps for Android
Public Blockchain as a Decentralized Finance Infrastructure Service Platform
A library for doing homomorphic encryption operations on tensors
Go tool for managing Linux filesystem encryption
⚡️ A fast implementation of Node's `crypto` module written in C/C++ JSI
OpenPGP implemented in pure Rust, permissively licensed
Unsafely fast hashing algorithm 📈
Threshold Signature Scheme, for ECDSA and EDDSA
A proof-of-concept cracker for cryptocurrency brainwallets and other low entropy key algorithms.
This repository contains a simple vulnerability scanner for the Terrapin attack present in the paper "Terrapin Attack: Breaking SSH Channel Integrity By Sequence Number Manipulation".
Ruby FFI binding to the Networking and Cryptography (NaCl) library (a.k.a. libsodium)
pure-python ECDSA signature/verification and ECDH key agreement
Trezor Suite Monorepo
The simplest and most extensible zkVM. Fast and fully open source from a16z crypto and friends. ⚡
End-to-end encrypted instant web chat
📖Code for Blockchain Demo
🔑 Free Offline-first Password Manager
BitCracker is the first open source password cracking tool for memory units encrypted with BitLocker
Privacy-first, end-to-end encrypted Mail, Pages, Drive, and Calendar.
A Python wrapper around the OpenSSL library