Add digital signatures to PDF documents - GUI and CLI, cross-platform
https://avgvstousb.com
FIDO® Certified StrongKey FIDO Server (SKFS)
57 Hash Functions In One Program, plus each with HMAC or KMAC
Midbar is more than just an open source password vault!
yubikey-agent is a seamless ssh-agent for YubiKeys
Blockchain-based distributed PKI protocol
Text encryption tool using Vigenère cipher
SCSI Tape Encryption Manager
PKI & Card Management System to issue and manage tokens & certificates
Another C++ Hack
Ciphermail email encryption gateway (S/MIME, OpenPGP, PDF encryption)
Lite Security Module: a daemon to handle PKCS11 Secure Boxes