This category relates to JWT, short for JSON Web Token, a compact format for representing claims-statements about a user or other subject, or data exchanged between systems. A typical JWT has three dot-separated parts: a header describing the token and its protection method, a payload containing claims, and a signature or message authentication code used to check integrity and origin. The encoded parts are generally readable; signing a token does not encrypt its contents. Confidentiality requires a separate encrypted-token format. These distinctions help explain why JWTs are often used to convey information across services while still requiring careful validation of the token's signature, issuer, audience, and expiration.