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

A free, open-source, robust yet user-friendly, compact and cross-platform tool for OpenPGP encryption. It stands out as an exceptional GUI frontend for the modern GnuPG (gpg).

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

Library for elliptic curves cryptography

Small portable Elliptic-Curve Diffie-Hellman in C

go 常用加密解密库/go encrypt or decrypt pkg（RSA/SM2/EIGamal/Gost/AES/DES/TripleDes/SM4/Tea/Twofish）

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

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

Elliptic Curve Cryptography playground/toolkit written in pure Python

A generic ECDH implementation

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

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

a native library implementing secp256k1 purely for the crystal language.

PoC of a UEFI Petya ransomware

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.

High assurance Go secp256k1 (Mirror)