Id_token_signing_alg_values_supported is a REQUIRED Openid-configuration JSON array containing a list of the JSON Web Signature signing algorithms (alg values) supported by the this OpenID Connect Identity Provider (IDP) for the Identity Token to encode the Claims in a JSON Web Token.

The algorithm RS256 MUST be included.

The value none MAY be supported, but MUST NOT be used unless the Response Type used returns no Identity Token from the Authorization_endpoint (such as when using the Authorization Code Flow).

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