System and method for controlling display of copy-never content

Details System and method for controlling display of copy-never content System and method for controlling display of copy-never content

2004-12-06

2008-11-18

Zand, Kambiz (Department: 2134)

Cryptography

Video cryptography

Copy protection or prevention

C705S057000

Reexamination Certificate

active

07454019

ABSTRACT:
A method and system for controlling the use of unauthorized content, and specifically for controlling the display of content that is marked as “copy-never.” A compliant signal source transmits a video signal along with a secure timestamp to a compliant display device. The compliant display device determines whether the video signal is authorized to be displayed by determining the content management usage rights status in the video signal and the delay between when the video signal was transmitted and when it was received. In an embodiment of the invention, copy-never content that exceeds a defined delay between transmission and reception is prevented from being displayed.

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International Search Report and Written Opinion, PCT/US/2004/040862.

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