What is a claim OpenID?

OpenID Connect (OIDC) scopes are used by an application during authentication to authorize access to a user’s details, like name and picture. Each scope returns a set of user attributes , which are called claims. The scopes an application should request depend on which user attributes the application needs.

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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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