@techreport{gutmann-ocsp-rtcs-00, number = {draft-gutmann-ocsp-rtcs-00}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/html/draft-gutmann-ocsp-rtcs-00}, author = {Peter Gutmann}, title = {{Real-time Certificate Status Facility for OCSP - (RTCS) }}, pagetotal = 0, year = 2003, month = jan, day = 13, abstract = {When the OCSP protocol was defined, the design was based on full compatibility with CRL-based mechanisms. This requires the use of a complex means of certificate identification that has resulted in interoperability problems among implementations, a design unsuited for high-throughput, real-time operation, the inability to provide an unambiguous certificate status response (the only thing that a CRL can say with certainty is 'revoked'), and an online responder tied to an offline mechanism (some CAs issue CRLs only once or twice a day, even though they have an online, real- time certificate store available). A more practical problem is that it makes it impossible to implement an OCSP responder not based on CRLs, for example one that consults a certificate database or in-memory hash table to determine the presence or absence of a valid certificate.}, }