JWT (JSON Web Token) authentication is a stateless authentication mechanism that uses digitally signed JSON objects to securely transmit information between parties. The process involves three key steps: creation, signing, and verification. 1. Creation: The first step is to create the JWT. A JWT consists of three parts: a header, a payload, and a signature. a. Header: The header typically specifies the token type (JWT) and the signing algorithm being used (e.g., HS256, RS256). It's a JSON object that is Base64 URL encoded. b. Payload: The payload contains the claims, which are statements about the user or entity. Claims can be registered claims (e.g., `iss` (issuer), `sub` (subject), `aud` (audience), `exp` (expiration time)), public claims (defined by the application), an....
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