An S/MIME signing utility for use with Git

SSH server & client security auditing (banner, key exchange, encryption, mac, compression, compatibility, security, etc)

An advanced, yet simple, tunneling/pivoting tool that uses a TUN interface.

The Complete Authentication and User Management Solution for the Passkey Era. Open Source Alternative to Clerk, Auth0, et al.

Server-side Web Authentication library for Java https://www.w3.org/TR/webauthn/#rp-operations

C library for prototyping and experimenting with quantum-resistant cryptography

Simple and flexible tool for managing secrets

Reference implementation of OpenPubkey

A curated list of resources about post-quantum cryptography

CSAF CMS Backend is a REST-based backend to support the creation and management of CSAF 2.0 documents

Analyze HTTP requests to minimize risks of HTTP Desync attacks (precursor for HTTP request smuggling/splitting).

A curated list of services and software that have migrated to post-quantum secure cryptography

BSI's CycloneDX Property Taxonomy to provide help with TR-03183-2