When dealing with JSON Web Tokens WTS What is a claim?

JSON web tokens (JWTs) claims are pieces of information asserted about a subject . For example, an ID token (which is always a JWT) can contain a claim called name that asserts that the name of the user authenticating is “John Doe”.

The claims in a JWT are encoded as a JSON object that is digitally signed and optionally encrypted . Encryption for JWTs is described in a separate companion specification. The suggested pronunciation of JWT is the same as the English word “jot”.4 Oca 2011

The jti (JWT ID) claim provides a unique identifier for the JWT . The identifier value MUST be assigned in a manner that ensures that there is a negligible probability that the same value will be accidentally assigned to a different data object. The jti claim can be used to prevent the JWT from being replayed.13 Ara 2011

The “aud” (audience) claim identifies the recipients that the JWT is intended for . Each principal intended to process the JWT MUST identify itself with a value in the audience claim.