A JSON Web Token (JWT) is a compact, URL-safe means of representing claims to be transferred between two parties, commonly used for authentication and authorization. It comprises three distinct parts: a Header, which specifies the token type and algorithm; a Payload, containing claims about the user and additional data; and a Signature. The signature is crucial, created by encoding the header and payload, combining them with a secret key, and signing the result, which mathematically verifies the token's integrity and authenticity. When a user successfully logs in, the server generates a JWT and sends it to the client, which then stores and attaches it to subsequent requests for protected resources. The server subsequently verifies the token's signature using the same secret key; if valid, it processes the request, trusting the claims within the payload and ensuring the token hasn't been tampered with. More details: https://kmstudio.com.ua/