![]() ![]() ![]() CAs use their private key to sign digital certificates and anyone with the CA’s public key can verify the signature on a digital certificate, trusting the information as it cannot be modified. ![]() what the certificate can be used for, where to check the revocation status of the certificates, etc.)Ĭertificate Authorities digitally sign the above data to prevent further modification. Certificate Validity Dates (valid from, valid to).Certificate Authorities use the Public Key Infrastructure (PKI) X.509 certificate to verify whether public keys match the identity of the user. Certification Authorities are deployed as part of an organisation’s IT security architecture and operated by internal security teams or are operated by Trust Service Providers (TSPs). What is a certificate authority and how do they work?Ĭertificate Authorities (CA) are a core part of a digital trust infrastructure that issues and manages digital certificates which can be used to verify the identity of public key subjects. 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’. When a user requests the validity of a certificate, an OCSP request is sent to an OCSP Responder. In this blog we answer some of the most common questions about OCSP including how it works, the roles of certificate authorities and certificate validation authorities, and how to check certificates via a CRL. OCSP stands for Online Certificate Status Protocol and is used by Certificate Authorities to check the revocation status of an X.509 digital certificate. ![]()
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