Apparatus and method for receiving and decrypting encrypted data and protecting decrypted data from illegal use
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 9, 2000
Grant Date -
N/A
app pub date -
Sep 2, 1997
filing date -
Sep 3, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A data receiving apparatus is formed of a set top unit connected to a network and a security module. Digital video data which is supplied from the network and scrambled according to a first system is scrambled according to a second system in a scramble circuit in the set top unit, and is supplied to the security module. The data is descrambled according to the first system in a descramble circuit in the security module, and is transferred back to the set top unit. The data is descrambled according to the second system in a descramble circuit in the set top unit, and is outputted to an image display terminal via an MPEG decoder.
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