Copy prevention method and apparatus for digital video system

Details Copy prevention method and apparatus for digital video system Copy prevention method and apparatus for digital video system

1998-04-01

2000-02-22

Cangialosi, Salvatore

Cryptography

Cryptanalysis

H04L 900

Patent

active

060289325

ABSTRACT:
A copy prevention method and apparatus for a digital video system is disclosed including the steps of: (a) adding a header area of a header start code and key field to a reproduced bit stream; (b) decrypting and transmitting the bit stream to which the header area is added; (c) detecting a key field of the decrypted and transmitted bit stream and detecting copy prevention information; and (d) encrypting the bit stream according to information detected from step (c) and recording it on tape.

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