cryptography

Portable OpenSSH

A self-contained cryptographic library for Python

Declare your digital independence

C library for prototyping and experimenting with quantum-resistant cryptography

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.

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

Collection of resources spanning key areas of Computer Science

The Nexus zkVM: The zero-knowledge virtual machine

A simple management tool for dnscrypt-proxy

Software U2F authenticator for macOS

跨平台密码学工具箱。包含编解码，编码转换，加解密， 哈希，MAC，签名，大数运算，压缩，二维码功能，CTF等功能。

BouncyCastle.NET Cryptography Library (Mirror)

Consequence firewall for machine actions. EMILIA Gate verifies exact authority before money, code, permissions, infrastructure, or regulated state changes; the open protocol makes the evidence independently verifiable.

面向小白用户的 CTF / 逆向 Skills 整合包：自动分流、头脑风暴、教学模式、比赛模式、只提示模式

Encrypted peer-to-peer IM for data security. Own data, own privacy. (Rust+Flutter)

A complete private computer on a USB stick. PAI is a bootable Debian 12 Linux distro that runs Ollama locally on any x86_64 or ARM64 machine — full desktop, local AI, hardened networking, all in RAM. Plug in, boot in seconds, work anywhere, pull the stick and nothing stays behind. Your AI on your hardware, no cloud, no accounts. https://pai.direct

High-performance capability authorization engine for AI agents. Cryptographically attenuated warrants, task-scoped authority, verifiable offline. Rust core.

Open-source security gateway & static scanner for AI agents. Enforce role-based access control (RBAC), human-in-the-loop approvals, segregation of duties, and cryptographically signed, offline-verifiable audit logs.

A unified SDK for IronCore encryption operations including vector encryption for AI data