This is a PHP library for implementing JSON Web Tokens to securely encode, decode, and verify identity claims between parties. It provides the core utilities necessary to create signed tokens and validate their authenticity to ensure data integrity.
The library includes a mechanism for caching remote JSON Web Key sets locally. This reduces network requests and optimizes the process of signature verification and key rotation.
Capabilities cover a range of cryptographic operations, including HMAC-based signature verification and RSA-based asymmetric signing. It handles Base64Url encoding for transport and provides stateless claim validation to verify tokens without database lookups.