PHP Secure Communications Library

Practical Cryptography for Developers: Hashes, MAC, Key Derivation, DHKE, Symmetric and Asymmetric Ciphers, Public Key Cryptosystems, RSA, Elliptic Curves, ECC, secp256k1, ECDH, ECIES, Digital Signatures, ECDSA, EdDSA

Open-source implementation of a substantial portion of the API of Apple CryptoKit suitable for use on Linux platforms.

pure-python ECDSA signature/verification and ECDH key agreement

SM2/SM3/SM4/ECDH crypto library based on OpenSSL.

go 常用加密解密库/go encrypt or decrypt pkg（RSA/SM2/ECDSA/EC-GDSA/Gost/ElGamal/AES/DES/TripleDes/SM4/Tea/Twofish）

Small portable Elliptic-Curve Diffie-Hellman in C

Library for elliptic curves cryptography

Safest and fastest Python library for secp256k1 elliptic curve operations

Secure Wireless Data-Transfer over BLE and USB for Passwords, Pentesting and Media Control.

Kotlin Multiplatform Crypto/PKI/ASN.1 Library with Attestation and Hardware-Backed Crypto Support on Mobile

FxSsh is a lightweight SSH server side library.

Elliptic Curve, Schnorr, and ZKP for Bitcoin. Supports iOS macOS tvOS watchOS visionOS + Linux.

A fast, lightweight, and full duplex secure end-to-end encryption protocol based on ECDHE

Ed25519 signing, verification and encryption, decryption for arbitary files; like OpenBSD signifiy but with more functionality and written in Golang - only easier and simpler

Tests support and behavior of elliptic curve cryptography implementations on JavaCards (TYPE_EC_FP and TYPE_EC_F2M) and in selected software libraries.

Elliptic Curve Cryptography playground/toolkit written in pure Python

A generic ECDH implementation

A lightweight, encrypted, WAN oriented, software defined network device.

a native library implementing secp256k1 purely for the crystal language.

Pure Rust implementation of HPKE (https://www.rfc-editor.org/rfc/rfc9180.html)

A Python package for Elliptic Curve Cryptography (ECC), supporting ElGamal, ECDH and ECDSA.

VESvault End-to-End Encryption API: Encrypt Everything Without Fear of Losing the Key

An easy-to-use XChaCha20-encryption wrapper for io.ReadWriteCloser (even lossy UDP) using ECDH key exchange algorithm, ED25519 signatures and Blake3+Poly1305 checksums/message-authentication for Go (golang). Also a multiplexer.

🔐 A high-performance E2EE library for .NET with Signal Protocol support. Features X3DH, Double Ratchet, Sender Keys, AES-GCM, RSA, ECDH, ECDSA, and secure key management. Supports .NET 6-10, .NET Standard 2.0/2.1, and .NET Framework 4.8+.

Bindings to lib-secp256k1 for golang

Solutions to https://cryptopals.com problems

High assurance Go secp256k1 (Mirror)

Swift wrapper around libsecp256k1 with API's like CryptoKit.

A full rewrite of Red Petya ransomware from 2016 with full MBR and GPT support