CRL last changed extension or attribute

Details CRL last changed extension or attribute CRL last changed extension or attribute

2006-10-03

2006-10-03

Darrow, Justin T. (Department: 2132)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Central trusted authority provides computer authentication

C713S160000, C713S161000, C713S175000

Reexamination Certificate

active

07117360

ABSTRACT:
A method and apparatus for generating a CRL with a last_changed extension. When sequential CRLs are generated there is the potential that there will be no changes in the data associated with the CRL. In this case a recipient of the new CRL may needlessly perform processing on the new CRL. A CRL consistent with embodiments of the present invention provides an extension to specify the CRL number of the last_changed CRL. This provides the recipient with information to determine whether the new CRL should be processed or the existing data is up to date.

REFERENCES:
patent: 5481601 (1996-01-01), Nazif et al.
patent: 5687235 (1997-11-01), Perlman et al.
patent: 6128740 (2000-10-01), Curry et al.

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