pure-python ECDSA signature/verification and ECDH key agreement

📡 An AX.25 packet radio chat protocol with support for digital signatures and binary compression. Like IRC over radio waves.

A simple, modern, and secure encryption and signing tool that aims to be a better version of age and Minisign.

⭐ Приложение-сервер для работы с Электронно Цифровой Подписью (ЭЦП) РК

a PDF library for rust

Simple and Agnostic PDF Document Parser in PHP - sign PDF docs using PHP

A linked data proof suite for BBS+ signatures

Multi-provider digital signature library for Rust

A pure python implementation of ML-DSA (FIPS 204) and CRYSTALS-Dilithium

Be a part of learnmeabitcoin translation

Ed25519 high-performance public-key signature system as a RubyGem (MRI C extension and JRuby Java extension)

Hääl - Anonymous Electronic Voting System on Public Blockchains

Bash script that verifies your GOG offline installers' authenticity and checksums. Made to scan large collections.

Pure Rust client for YubiHSM2 devices

Make Instructions: Airgapped raspberry pi computer for working with blockchains featuring LUKS full disk encryption and using qr-codes to pass encrypted files and offline transaction instructions across the airgap.

NIST FIPS 204 (ML-DSA) standard compliant, C++20, fully `constexpr`, header-only library

Kudelski Security's 2018 pre-Black Hat crypto challenge

A simple Dart library for asymmetric encryption and digital signatures

Cross-platform Python client for ARX CoSign electronic signatures via SOAP API

PDF-Signer is a Library that allows you to add Digital Signatures to Any PDF file by picking a signature from a gallery or handwriting

yubisigner - An easy to use file signing tool for your YubiKey.

An Advanced PHP Cryptography Framework

Python implementation of secp256k1 elliptic curve cryptography and ECDSA signing/verification.

Powerful APIs for object-oriented, and functional programming, including general-purpose, numerics, security, and cryptography APIs

WeasySign is a small simple to use high level library for digitally signing pdf's generated with the WeasyPrint PDF library.

CRyptogrAphic COnstructions

Quantum-resistant, purely Hash-based, Stateful, One-Time Digital Signatures for OCaml. :shield: :camel: :lock: :key: [Work In Progress]

Official PHP client for SignRequest.com

Swift library for DIDComm V2 protocol with message encryption/decryption, signing, DID authentication, and advanced routing for secure, decentralized communication.

Chrome extension for identity and key management