JWT Decoding and Validation: Essential Practices for Secure OAuth 2.0 Implementations
JSON Web Tokens (JWT) have become the backbone of modern OAuth 2.0 and OpenID Connect (OIDC) authentication, carrying identity and authorization claims securely between parties. Proper decoding and validation of JWTs are critical to maintaining the security of your applications. What is a JWT? A JWT is a compact, URL-safe token consisting of three parts: Header: Specifies the token type and signing algorithm. Payload: Contains claims about the user or system (e.g., user ID, roles). Signature: Verifies token integrity and authenticity. Example JWT: ...