Method and apparatus for providing a secure system time

Details Method and apparatus for providing a secure system time Method and apparatus for providing a secure system time

2011-04-19

2011-04-19

Rao, Seema S (Department: 2462)

Multiplex communications

Communication over free space

Repeater

C370S350000, C370S509000, C713S155000, C713S165000

Reexamination Certificate

active

07929483

ABSTRACT:
The present invention discloses a system and method for providing a secured system time reference to a subscriber device, e.g., a set top box or a receiver. In one embodiment, the system time reference is provided in a secure system time message that is broadcasted to a plurality of subscriber devices. Each subscriber device has a security device or software application that is capable of determining whether the received system time reference is legitimate. If the system time reference is determined to be legitimate, a local time reference is synchronized with said received system time reference.

REFERENCES:
patent: 7373672 (2008-05-01), Un
patent: 2002/0169970 (2002-11-01), Candelore
patent: 2004/0223515 (2004-11-01), Rygielski et al.
patent: 2005/0005114 (2005-01-01), Medvinsky
Krebs; Synchronization system for internal clocks of synchronized devices, using satellite positioning system as time reference and receiver in central station which distributes received time signal to internal clocks May 23, 2002.

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