The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 02, 2009
Filed:
Feb. 26, 2003
Blair Brewster Dillaway, Clyde Hill, WA (US);
Philip Lafornara, Bellevue, WA (US);
Brian A. Lamacchia, Seattle, WA (US);
Rushmi U. Malaviarachchi, Bellevue, WA (US);
John L. Manferdelli, Redmond, WA (US);
Charles F. Rose, Iii, Redmond, WA (US);
Blair Brewster Dillaway, Clyde Hill, WA (US);
Philip Lafornara, Bellevue, WA (US);
Brian A. LaMacchia, Seattle, WA (US);
Rushmi U. Malaviarachchi, Bellevue, WA (US);
John L. Manferdelli, Redmond, WA (US);
Charles F. Rose, III, Redmond, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
A digital certificate identifies an entity as having authority over the certificate to revoke same as delegated by the issuer. The certificate also has at least one revocation condition relating to possible revocation of the certificate. To authenticate the certificate, the identification of the delegated revocation authority, a location from which a revocation list is to be obtained, and any freshness requirement to be applied to the revocation list are determined from the certificate. It is then ensured that the revocation list from the location is present and that the present revocation list satisfies the freshness requirement, that the revocation list is promulgated by the delegated revocation authority identified in the certificate, and that the certificate is not identified in the revocation list as being revoked.