Online Certificate Status Protocol – OCSP RFC 4806, Online Certificate Status Protocol (OCSP) Extensions to IKEv2 RFC 5019, The Lightweight Online Certificate Status Protocol (OCSP) Profile for High-Volume Environments RFC 6960, X.509 Internet Public Key Infrastructure Online Certificate Status Protocol – OCSP Processor.com April, 2009 article about Online Certificate Status Protocol Public key infrastructure Cryptographic protocols Internet Standards Internet protocols Transport Layer Security