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Does OCSP use HTTP?
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 use OCSP to validate HTTPS certificates.
Should I use OCSP?
Why you should use OCSP stapling OCSP stapling means providing website visitors with better security at faster speeds. Users experience faster load times on encrypted content due to no direct connections between the web browser and CA. OCSP stapling is also better for user privacy.
Can CRL be HTTPS?
For CRL, RFC 5280 says: CAs SHOULD NOT include URIs that specify https, ldaps, or similar schemes in extensions. CAs that include an https URI in one of these extensions MUST ensure that the server’s certificate can be validated without using the information that is pointed to by the URI.
What is the purpose of OCSP?
OCSP stands for Online Certificate Status Protocol and is used by Certificate Authorities to check the revocation status of an X. 509 digital certificate.
Why are OCSP requests sent over unencrypted HTTP?
OCSP requests are sent over unencrypted HTTP and are tied to a specific certificate. Sending an OCSP request tells the certificate authority which websites you are visiting. Furthermore, everyone on the network path between your browser and the OCSP server will also know which sites you are browsing.
Why is it important to have a reliable OCSP server?
A broken OCSP or CRL server becomes a central point of failure for all certificates issued by a certificate authority. If browsers followed a hard-fail strategy, an OCSP outage would be an Internet outage. Certificate authorities are organizations optimized to provide trust and accountability, not necessarily resilient infrastructure.
What is OCSP and how does it work?
When a user requests the validity of a certificate, an OCSP request is sent to an OCSP Responder. This checks the specific certificate with a trusted certificate authority and an OCSP response is sent back with a response of either ‘good’, ‘revoked’ or ‘unknown’. What is a certificate authority and how do they work?
What are the downsides of live OCSP checking?
Live OCSP checking has an additional downside: it leaks private browsing information. OCSP requests are sent over unencrypted HTTP and are tied to a specific certificate. Sending an OCSP request tells the certificate authority which websites you are visiting.