HMAC authentication for Rails and HTTP Clients

Go JWT signing, verifying and validating

Sessions handler which stores session data in HMAC-signed and encrypted cookies

Refresh/Access JWT authentication server with backend + administration frontend supporting HMAC (HS256 HS384 HS512), RSA (RS256 RS384 RS512), ECDSA (ES256 ES384 ES512) and Ed25519 (EdDSA). See also other repos for Javascript, Python and Go client libraries.

C++11 HMAC (SHA1/SHA256/SHA512) library with PBKDF2/HKDF, HOTP/TOTP + stateless time tokens, Base32/64/36, zeroizing secure_buffer, CMake package and MQL5 support.

Caddy v2 hmac signature validation middleware

Node.js utility to generate an AWS HMAC signature

Digital Signature with hmac SHA256 implemented with python3

🛡️ Sub-millisecond security layer for Node.js. Enterprise-grade defense featuring cost-based rate limiting, HMAC request signing, active session-hijacking protection, and JA4 fingerprinting.

Online Tax Payment System with encryption algorithms.

XML::Sig - A Perl toolkit to help sign and verify XML Digital Signatures.

Command-line tool written in C# to lock a file with a password.

HMAC stands for Hash-Based Message Authentication Code. It is a security mechanism used to verify the integrity and authenticity of a message exchanged between a client and a server.

WhatsApp Cloud API integration for Next.js App Router: webhook verify + X-Hub-Signature-256, the 24-hour customer service window, template vs free-form, and async sent/delivered/read/failed status correlation.

Backend for booking Yoga Classes

Simple, dependency-free Go library for HOTP/TOTP (RFC 4226/6238) — generate, verify, and integrate OTPs for 2FA.

Delegate HMACing to a server

HMAC API authentication middleware for Laravel applications.