Interactive television security through transaction time stamping
 A system for providing security on an interactive television system. Two sets of interactive data, with time stamps, are separately sent to a remote location. At the remote location, the time stamps are checked against a remote clock, a time difference being noted for both sets of data. The two time differences are compared to determine if one set of data has been delayed as compared to the other. Non-delayed data can be used to update a game score for an interactive game. After the game is completed, the remote clock is compared to a central clock. the difference between the two clocks are compared to the time difference for non-delayed data to determine whether the entire aggregate of interactive data was delayed. 
Thomson Multimedia S.A.
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Eric C. Susan K. Cameron A. Wayne Y. John P. Richard S.
Berkobin Marshall Wilson Yamamoto Lappington Simons