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OCSP requests may be chained between peer responders to query the issuing CA appropriate for the subject certificate, with responders validating each other's responses against the root CA using their own OCSP requests. An OCSP responder may be queried for revocation information by delegated path validation (DPV) servers. OCSP does not, by ...
For example, when Apache queries the OCSP server, in the event of a temporary failure, it will discard the cached good response from the previous request, and start serving bad response. [19] Nginx performs lazy loading of OCSP responses, which means that for the first few web requests it is unable to add the OCSP response. [20]
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 ...
OCSP stapling is a TLS extension providing for OCSP responses being provided to the client, together with the certificate, at connection initiation. [30] OCSP stapling can solve the operational challenges of OCSP, namely additional network requests causing latency and privacy degradation. [33]
This includes OCSP responses, CRLs, and delta CRLs, which are critical for checking the current status of certificates. [1] The DPV server must have access to the certificate that needs validation. If the certificate is not provided in the request, the server must obtain it and verify that it matches the reference provided by the client.
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A drawback to offline operation is that hosting of a certificate revocation list by the root CA is not possible (as it is unable to respond to CRL requests via protocols such as HTTP, LDAP or OCSP). However, it is possible to move certificate validation functionality into a dedicated validation authority authorized by the offline root CA.
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