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:
Mar. 02, 2010
Filed:
Aug. 27, 2001
Lane W. Lee, Lafayette, CO (US);
Timothy R. Feldman, Louisville, CO (US);
Douglas M. Rayburn, Denver, CO (US);
Gary G. Kiwimagi, Loveland, CO (US);
Lane W. Lee, Lafayette, CO (US);
Timothy R. Feldman, Louisville, CO (US);
Douglas M. Rayburn, Denver, CO (US);
Gary G. Kiwimagi, Loveland, CO (US);
DPHI Acquisitions, Inc., Longmont, CO (US);
Abstract
A system and method is provided for revoking a device. A method includes receiving a certificate from the device, the certificate including one or more of fields, at least one of the fields holding a signature, attempting to verify the signature, receiving a revocation list from a source, the revocation list identifying one or more data on the certificate as valid or invalid, the data including at least one of the fields of the certificate; and if one of one or more signatures identified unsuccessfully verified and one or more data is identified as invalid, preventing the transmission of a session key to the device, the session key being required to establish a secure communication channel.