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:
Apr. 16, 2013
Filed:
Oct. 31, 2008
Liang Guo, Brighton, MA (US);
Whay Chiou Lee, Cambridge, MA (US);
Anthony R. Metke, Naperville, IL (US);
Liang Guo, Brighton, MA (US);
Whay Chiou Lee, Cambridge, MA (US);
Anthony R. Metke, Naperville, IL (US);
Motorola Solutions, Inc., Schaumburg, IL (US);
Abstract
A method and device are useful for enabling a trust relationship using an expired public key infrastructure (PKI) certificate. The method includes determining at a relying party a maximum permissible grace period during which the PKI certificate can be conditionally granted a valid status (step). Next, at the relying party an uncertainty interval is determined, during which the relying party is unable to detect a revocation of the PKI certificate (step). A certificate grace period is then determined at the relying party from a function of the maximum permissible grace period, the uncertainty interval and at least one attribute defined in the PKI certificate (step). Using the PKI certificate, a trust relationship is then enabled between the relying party and a certificate holder of the PKI certificate, after determining the grace period and before an expiration of the grace period (step).