Descrambler

Details Descrambler Descrambler

2011-04-05

2011-04-05

Dinh, Minh (Department: 2432)

Cryptography

Video cryptography

Video electric signal modification

C380S029000, C380S228000, C380S239000

Reexamination Certificate

active

07920703

ABSTRACT:
According to one embodiment of the invention, the descrambler IC comprises a local memory to store a unique key and a plurality of process blocks. A first process block performs cryptographic operations on a first mating key generator using the unique key in order to produce a first key. A second process block uses the first key to perform cryptographic operations on a second mating key generator in order to produce a second key. Using the first key and the second key, a third process block decrypts a first encrypted descrambling key in order to recover a first descrambling key and a fourth process block decrypts a second encrypted descrambling key to recover a second descrambling key. The descrambler IC includes a descrambler to descramble the scrambled digital content using both the first descrambling key and the second descrambling key in order to produce digital content in a clear format.

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