Advanced certificate status protocol

Abstract

This paper proposes ACSP (Advanced Certificate Status Protocol), a new online certificate status checking protocol. ACSP is a flexible revocation status checking system, for ACSP allows users to set their own recency requirements. In addition, ACSP is very efficient because ACSP requires small computational and communicational costs compared with OCSP in most environments. Actually, OCSP can be considered as a special case of ACSP. We also propose ACSP+ that is a variant of ACSP with a proxy responder.