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Add digital signatures to PDF documents - GUI and CLI, cross-platform
FIDO® Certified StrongKey FIDO Server (SKFS)
Sign PDF with Digital Signature Software. Batch PDF Sign. DSC Signer.
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
Symetric file encryption based on OTP implemented as XOR encryption
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