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This reversible status can be used to note the temporary invalidity of the certificate (e.g., if the user is unsure if the private key has been lost). If, in this example, the private key was found and nobody had access to it, the status could be reinstated, and the certificate is valid again, thus removing the certificate from future CRLs.
The OCSP responder uses the certificate serial number to look up the revocation status of Alice's certificate. The OCSP responder looks in a CA database that Carol maintains. In this scenario, Carol's CA database is the only trusted location where a compromise to Alice's certificate would be recorded.
The CA then produces and distributes cryptographically authenticated attestations that the certificate has been revoked. [12] The CA/B requirements also allow a CA to autonomously revoke certificates if the CA is aware of a possibility of compromise. [13] Anyone may submit such evidence. [14]
Third parties monitoring certificate authority behavior might check newly issued certificates against the domain's CAA records. RFC 8659 states; CAA records MAY be used by Certificate Evaluators as a possible indicator of a security policy violation. Such use SHOULD take into account the possibility that published CAA records changed between ...
The client uses the CA certificate to authenticate the CA signature on the server certificate, as part of the authorizations before launching a secure connection. [3] Usually, client software—for example, browsers—include a set of trusted CA certificates. This makes sense, as many users need to trust their client software.
The application can be an authentication application, an accounting application, or a vendor-specific application. Diameter agents conforming to a certain Diameter extension publicize its support by including a specific value of in the Auth-Application-ID Attribute of the Capabilities-Exchange-Request (CER) and Capabilities-Exchange-Answer (CEA ...
In 2020, the S/MIME Certificate Working Group [3] of the CA/Browser Forum was chartered to create a baseline requirement applicable to CAs that issue S/MIME certificates used to sign, verify, encrypt, and decrypt email. That effort is intended to create standards including:
The Online Certificate Status Protocol (OCSP) stapling, formally known as the TLS Certificate Status Request extension, is a standard for checking the revocation status of X.509 digital certificates. [1]