jwt security

JWT security is a critical concern for developers building authentication systems with JSON Web Tokens. The strength of a JWT relies entirely on the secrecy and management of its signing key. Weak or poorly stored secrets expose applications to token forgery and unauthorized access. This tag covers best practices for generating cryptographically secure keys, storing them safely (e.g., in environment variables or HSMs), and implementing key rotation to limit the impact of a compromised secret. Practical guidance includes Node.js code examples for production-ready JWT signing, verification, and operational controls that transform a fragile token system into a resilient authentication layer.