Illegal view and copy protection method in digital video system

Details Illegal view and copy protection method in digital video system Illegal view and copy protection method in digital video system

1995-11-22

1998-05-26

Barron, Jr., Gilberto

Cryptography

Cryptanalysis

380 16, H04N 7167

Patent

active

057579091

ABSTRACT:
Illegal view and copy protection method in a digital video system for preventing an illegal user from viewing the digital video system and copying therefrom, by setting a descrambling method which decrypts split keystreams adopting a smart card, including a determination step for determining received data of having been scrambled; a reproduction step, a recording step, and a transporting step, wherein the reproduction step, the recording step and the transporting step can be performed simultaneously or selectively.

REFERENCES:
patent: 4908834 (1990-03-01), Wiedemer
patent: 5237610 (1993-08-01), Gammie et al.
patent: 5418853 (1995-05-01), Kanota et al.
patent: 5461674 (1995-10-01), Citta

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