Method for providing trusted time in a computing platform

Details Method for providing trusted time in a computing platform Method for providing trusted time in a computing platform

2011-06-14

2011-06-14

Henning, Matthew T (Department: 2491)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S193000, C713S001000, C726S034000, C368S046000

Reexamination Certificate

active

07962752

ABSTRACT:
Providing trusted time in a computing platform, while still supporting privacy, may be accomplished by having a trusted time device provide the trusted time to an application executing on the computing platform. The trusted time device may be reset by determining if a value in a trusted time random number register has been set, and if not, waiting a period of time, generating a new random number, and storing the new random number in the trusted time random number register. The trusted time random number register is set to zero whenever electrical power is first applied to the trusted time device upon power up of the computing platform, and whenever a battery powering the trusted time device is removed and reconnected. By keeping the size of the trusted time random number register relatively small, and waiting the specified period of time, attacks on the computing platform to determine the trusted time may be minimized, while deterring the computing platform from being uniquely identified.

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