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All versions of Mozilla Firefox support OCSP checking. Firefox 3 enables OCSP checking by default. [16] Safari on macOS supports OCSP checking. It is enabled by default as of Mac OS X 10.7 (Lion). Prior to that, it has to be manually activated in Keychain preferences. [17] Versions of Opera from 8.0 [18] [19] to the current version support OCSP ...
OCSP stapling is designed to reduce the cost of an OCSP validation, both for the client and the OCSP responder, especially for large sites serving many simultaneous users. However, OCSP stapling supports only one OCSP response at a time, which is insufficient for certificate chains with intermediate CA certs. [26] [27]
The Online Certificate Status Protocol (OCSP) allows clients to interactively ask a server (an OCSP responder) about a certificate's status, receiving a response that is cryptographically authenticated by the issuing CA. [29] It was designed to address issues with CRLs. [30] A typical OCSP response is less than 1 kB. [31]
Browsers and other relying parties might use CRLs, or might use alternate certificate revocation technologies (such as OCSP) [4] [5] or CRLSets (a dataset derived from CRLs [6]) to check certificate revocation status. Note that OCSP is falling out of favor due to privacy and performance concerns. [7] [8] [9] Subscribers and other parties can ...
In public key infrastructure, a validation authority (VA) is an entity that provides a service used to verify the validity or revocation status of a digital certificate per the mechanisms described in the X.509 standard and RFC 5280 (page 69). [1]
Certificate revocation lists are too bandwidth-costly for routine use, and the Online Certificate Status Protocol presents connection latency and privacy issues. Other schemes have been proposed but have not yet been successfully deployed to enable fail-hard checking. [32]
Checking Revocation Status: each certificate is checked against Certificate Revocation List (CRL) or online status protocols (such as OCSP) to ensure it has not been revoked. Applying Policies: any additional policies specified by the relying party are applied to ensure the certificate path complies with required security standards and practices.
The response may also contain proof of revocation status, such as OCSP responses, for the certificates in the path. Once a certification path has been constructed, it needs to be validated. An algorithm for validating certification paths is defined in RFC 5280 section 6 (signatures, expiration, name constraints, policy constraints, basic ...