Online Certificate Status Protocol

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Online Certificate Status Protocol (OCSP) is an Internet protocol used for obtaining the revocation status of an X.509 digital certificate. It is described in RFC 2560 and is on the Internet standards track. It was created as an alternative to certificate revocation lists (CRL), specifically addressing certain problems associated with using CRLs in a public key infrastructure (PKI). 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. Since an OCSP response contains less information than a typical CRL(certificate revocation list), OCSP can feasibly provide more timely information regarding the revocation status of a certificate without burdening the network. However, the greater number of requests and connection overhead may overwhelm this benefit if the client does not cache responses.

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Pagina's: 76, Paperback, Betascript Publishers