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Security '01 Abstract

A Method for Fast Revocation of Public Key Certificates and Security Capabilities

Dan Boneh, Stanford University; Xuhua Ding and Gene Tsudik, University of California, Irvine; Chi Ming Wong, Stanford University


We present a new approach to fast certificate revocation centered around the concept of an on-line semi-trusted mediator (SEM). The use of a SEM in conjunction with a simple threshold variant of the RSA cryptosystem (mediated RSA) offers a number of practical advantages over current revocation techniques. Our approach simplifies validation of digital signatures and enables certificate revocation within legacy systems. It also provides immediate revocation of all security capabilities. This paper discusses both the architecture and implementation of our approach as well as performance and compatibility with the existing infrastructure. Our results show that threshold cryptography is practical for certificate revocation.
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Last changed: 30 Apr 2002 ml
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