Check out the new USENIX Web site.

Home About USENIX Events Membership Publications Students
7th USENIX Security Symposium, San Antonio, Texas

Certificate Revocation and Certificate Update

Moni Naor and Kobbi Nissim
Weizmann Institute of Science

Abstract

A new solution is suggested for the problem of certificate revocation. This solution represents Certificate Revocation Lists by an authenticated search data structure. The process of verifying whether a certificate is in the list or not, as well as updating the list, is made very efficient. The suggested solution gains in scalability, communication costs, robustness to parameter changes and update rate. Comparisons to the following solutions are included: `traditional' CRLs (Certificate Revocation Lists), Micali's Certificate Revocation System (CRS) and Kocher's Certificate Revocation Trees (CRT).

Finally, a scenario in which certificates are not revoked, but frequently issued for short-term periods is considered. Based on the authenticated search data structure scheme, a certificate update scheme is presented in which all certificates are updated by a common message.

The suggested solutions for certificate revocation and certificate update problems is better than current solutions with respect to communication costs, update rate, and robustness to changes in parameters and is compatible e.g. with X.500 certificates.

  • View the full text of this paper in HTML form and PDF form.

  • If you need the latest Adobe Acrobat Reader, you can download it from Adobe's site.

  • To become a USENIX Member, please see our Membership Information.

?Need help? Use our Contacts page.

Last changed: 12 April 2002 aw
Technical Program
Conference Index
USENIX home