Complete and free implementation of the OpenPGP standard
A high-level OpenPGP library
ObjectivePGP is an open-source library for iOS and macOS
A simple, modern and secure encryption tool (and Go library)
AWS Encryption SDK for C
Sign PDF with Digital Signature Certificate
A cross-platform crypto-steganography toolkit
Solving the Satoshi Puzzle
FIDO strong authentication, encryption, digital signature engine
FIDO-enabled, cloud file encryption with centralized key management.
Simple GUI tool for openssl to sign files with GOST algorithm