REVOCATION OF CERTIFICATE AND EXCLUSION OF OTHER PRINCIPAL IN DIGITAL COPYRIGHT MANAGEMENT SYSTEM BASED ON REVOCATION LIST FROM DELEGATED REVOCATION AUTHORITY

PROBLEM TO BE SOLVED: To revoke a certificate and exclude other principalS based on a revocation list by a delegated revocation authority in a digital copyright management system. SOLUTION: A digital certificate identifies an entity having an authority to revoke the certificate delegated by an issue...

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Bibliographische Detailangaben
Hauptverfasser:	MANFERDELLI JOHN L, ROSE CHARLES F III, LAMACCHIA BRIAN A, DILLAWAY BLAIR BREWSTER, LAFORNARA PHILIP J, MALAVIARACHCHI RUSHMI U
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING DATA PROCESSING SYSTEMS OR METHODS, SPECIALLY ADAPTED FORADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORYOR FORECASTING PURPOSES ELECTRIC COMMUNICATION TECHNIQUE ELECTRIC DIGITAL DATA PROCESSING ELECTRICITY PHYSICS SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE,COMMERCIAL, FINANCIAL, MANAGERIAL, SUPERVISORY OR FORECASTINGPURPOSES, NOT OTHERWISE PROVIDED FOR TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To revoke a certificate and exclude other principalS based on a revocation list by a delegated revocation authority in a digital copyright management system. SOLUTION: A digital certificate identifies an entity having an authority to revoke the certificate delegated by an issuer. The certificate has at least one revocation condition associated with the possible revocation of the certificate. In order to authenticate the certificate, the identification of the delegated revocation authority, a location from which the revocation list is obtained, and a freshness requirement to be applied to the revocation list are determined from the certificate. It is then ensured that the revocation list obtained from the location is present, that the 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. COPYRIGHT: (C)2004,JPO&NCIPI