Peer to Peer Initiator Responder ----------- ----------- (1) HDR, SAi1, KEi, Ni --> (2) <-- HDR, SAr1, KEr, Nr, CERTREQ(OCSP Responder Hash) (3) HDR, SK {IDi, CERT(certificate), --> CERT(OCSP Response), CERTREQ(OCSP Responder Hash), [IDr,] AUTH, SAi2, TSi, TSr} (4) <-- HDR, SK {IDr, CERT(certificate), CERT(OCSP Response), AUTH, SAr2, TSi, TSr} |