SYSTEM AND METHOD FOR COPY PROTECTION FOR DIGITAL SIGNALS
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Abstract
Embodiments of the present invention provide for the copy protection of distributed material after conditional access is applied, regardless of where the material is distributed. The solutions described provide the advantage of being sufficiently simple in implementation to qualify as “curb high” solutions. “Curb high” solutions provide a range of security from minimal security to a high level of security while requiring relatively fewer system resources to implement than prior approaches.
13 Citations
41 Claims
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1-32. -32. (canceled)
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33. A method of copy protecting signals flowing from a descrambler module to a receiver via a link, the method comprising:
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(a) receiving a digital signal in the receiver, the digital signal including a scrambled signal;
(b) transmitting the digital signal from the receiver to the descrambler module via the link;
(c) receiving a copy protected signal, which has been descrambled and copy protected using the copy protection data signal, from the descrambler module; and
(d) reconverting the copy protected signal to the descrambled signal in the receiver using the copy protection data signal. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41)
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Specification