A New United Certificate Revocation Scheme in Grid Environments

This paper analyses security drawbacks of traditional certificates revocation in GSI. And we bring forward a new united certificate revocation scheme. In our scheme, one-way hash chains, novel multiple certificates and CRLs shared mode are proposed to improve the revocation mechanism. So partial functions of CA are distributed to other Grid nodes, congestion and single-point failure is avoided in Grid environments. The certificates issued by different CAs could carry out mutual authentication, and users can verify the validity of certificates without retrieving the revocation information from the CA which issues the certificates. To study the performance, three classical revocation schemes are used to compare with our united revocation scheme in the experiments. Simulation results and analysis show that the peak request value of united revocation is lower than other three schemes and the peak bandwidth value is narrower and the risk is reduced.