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. 12, 2011
Filed:
Aug. 31, 2005
Asad Mahboob Ali, Austin, TX (US);
Bertrand Du Castel, Austin, TX (US);
Apostol Vassilev, Austin, TX (US);
Sylvain Prevost, Austin, TX (US);
Kapil Sachdeva, Austin, TX (US);
Asad Mahboob Ali, Austin, TX (US);
Bertrand du Castel, Austin, TX (US);
Apostol Vassilev, Austin, TX (US);
Sylvain Prevost, Austin, TX (US);
Kapil Sachdeva, Austin, TX (US);
Gemalto SA, Meudon, FR;
Abstract
A system and a method for operating a device that is not capable of independently maintaining a local time clock to enforce a time-based transaction policy that requires a reliable time reference. The device establishes a secure communications channel to one or more network-attached time sources and inquires of each of the network-attached time-sources as to the current time using the secure communications channel. The device receives the current time from the network-attached time-sources and uses the received current times to estimate a current calendar time and to compute a reliability index associated with the estimated current calendar time. The device uses the estimated current calendar time and reliability index to enforce the time-based transaction policy.