Hi JWS Signature is the signature only. It does not repeat the payload.
Best, Nat Sakimura From: jose [mailto:jose-boun...@ietf.org] On Behalf Of Beth Lee Sent: Thursday, February 22, 2018 11:36 AM To: firstname.lastname@example.org Subject: [jose] Does JWS signature relate with JWS payload? Hi. I'm Jin. I have curious about JWS signatrue in JWT. I already read the JWT spec inforation from https://www.rfc-editor.org/rfc/rfc7515.txt But I'm still confusted about JWS signatrue contains or relate with JWS Payload value or not. I knew that JWT contained with 3 part. (JOSE Header, JWS Payload, JWS Signatrue) When I read the spec information. I understood that JWS signature value doesn't contain the JWS payload value. Am I right? Then how can I check data integrity based on JSW signature ? (I guess I'm not right.) I really want to solve my question but I can't reache the answers. So please give me some advice. Best regards, Jin
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