Why do we need JWT?

Information Exchange: JWTs are a good way of securely transmitting information between parties because they can be signed , which means you can be sure that the senders are who they say they are. Additionally, the structure of a JWT allows you to verify that the content hasn’t been tampered with.

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Where are JWT used?

The tokens are designed to be compact, URL-safe, and usable especially in a web-browser single-sign-on (SSO) context. JWT claims can typically be used to pass identity of authenticated users between an identity provider and a service provider, or any other type of claims as required by business processes .

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What is IAT and NBF?

iat (Issued At) Claim — Identifies the time at which the JWT token was issued. nbf (Not Before) Claim — Identifies the time before which the JWT token MUST NOT be accepted for processing. exp (Expiration Time) — Identifies the expiration time on or after which the JWT MUST NOT be accepted for processing.

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What is claim in JWT token?

Claims constitute the payload part of a JSON web token and represent a set of information exchanged between two parties . The JWT standard distinguishes between reserved claims, public claims, and private claims. In API Gateway context, both public claims and private claims are considered custom claims.

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