Secure/Multipurpose Internet Mail Extensions (S/MIME)
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Digital certificate
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RFC 6960: OCSP
RFC 8954: OCSP Nonce Extension
The Online Certificate Status Protocol (OCSP) is an Internet protocol used for obtaining the revocation status of an X.509 digital certificate.[2] It is described in RFC 6960 and is on the Internet standards track. It was created as an alternative to certificate revocation lists (CRL), specifically addressing certain problems associated with using CRLs in a public key infrastructure (PKI).[3] Messages communicated via OCSP are encoded in ASN.1 and are usually communicated over HTTP. The "request/response" nature of these messages leads to OCSP servers being termed OCSP responders.
Some web browsers (e.g., Firefox[4]) use OCSP to validate HTTPS certificates, while others have disabled it.[5][6] Most OCSP revocation statuses on the Internet disappear soon after certificate expiration.[7]
^A., Jesin (June 12, 2014). "How To Configure OCSP Stapling on Apache and Nginx". Community Tutorials. Digital Ocean, Inc. Retrieved March 2, 2015.
^"OCSP Stapling". GlobalSign Support. GMO GlobalSign Inc. August 1, 2014. Retrieved March 2, 2015.
^"CA/Revocation Checking in Firefox". wiki.mozilla.org. Retrieved 29 June 2022.
^"Are revoked certificates detected in Safari and Chrome?". 20 September 2017. Retrieved 29 June 2022.
^"CRLSets". Retrieved 29 June 2022.
^Korzhitskii, Nikita; Carlsson, Niklas (2021). "Revocation Statuses on the Internet". In Hohlfeld, Oliver; Lutu, Andra; Levin, Dave (eds.). Passive and Active Measurement. PAM 2021. LNCS. Vol. 12671. pp. 175–191. arXiv:2102.04288. doi:10.1007/978-3-030-72582-2_11. ISBN 978-3-030-72582-2. ISSN 0302-9743.
and 26 Related for: Online Certificate Status Protocol information
The OnlineCertificateStatusProtocol (OCSP) is an Internet protocol used for obtaining the revocation status of an X.509 digital certificate. It is described...
OnlineCertificateStatusProtocol (OCSP) to verify that this is not the case. The browser sends the certificate's serial number to the certificate authority...
certificates. Trusted third party Web of trust Certificate authority OnlineCertificateStatusProtocol "What is Certificate Revocation List (CRL)? - Definition...
Extended Validation certificates do not require issuing certificate authorities to immediately support OnlineCertificateStatusProtocol for revocation checking...
soft where they do. Certificate revocation lists are too bandwidth-costly for routine use, and the OnlineCertificateStatusProtocol presents connection...
fail-soft where they do. Certificate revocation lists are too bandwidth-costly for routine use, and the OnlineCertificateStatusProtocol presents connection...
indicating whether certificates are still valid. They provide this information through OnlineCertificateStatusProtocol (OCSP) and/or Certificate Revocation...
well as issuing backdating certificates. WoSign and StartCom issued a fake GitHub certificate. OnlineCertificateStatusProtocol (OCSP) Superfish SHA-1 Timestamp...
fail-soft where they do. Certificate revocation lists are too bandwidth-costly for routine use, and the OnlineCertificateStatusProtocol presents connection...
are Server Name Indication, Application-Layer Protocol Negotiation, and OnlineCertificateStatusProtocol. s2n supports the main ciphers in use today,...
supports certificate revocation lists and the OnlineCertificateStatusProtocol (OCSP). A unique feature is the use of X.509 attribute certificates to implement...
Digital signature Certificate policy Certificate Practice Statement Certificate revocation list OnlineCertificateStatusProtocol Computerized utilities...
auth, not sure about collaboration suite OnlineCertificateStatusProtocol - Description: RFC 2560 Certificate revocation list - Description: RFC 3280...
Security (TLS) is a cryptographic protocol designed to provide communications security over a computer network. The protocol is widely used in applications...
Ethernet network detects maximum MTU size. In ONTAP 9.2: OnlineCertificateStatusProtocol (OCSP) for LDAP over TLS; iSCSI Endpoint Isolation to specify...
the Regional Transport Office/Officer to inspect and issue a certification for protocol management of VIP convoys for to ensure safety and to avoid mismanagement...
in the register or protocol. Taking an acknowledgment (in the United States) of execution of a document and preparing a certificate of acknowledgement...
up to 256 bits outlined in RFC 3268 and certificate revocation checking using OnlineCertificateStatusProtocol. The TLS implementation has also been updated...
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