Reproduction device stopping reproduction of encrypted content data having encrypted region shorter than predetermined length
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United States of America Patent
Stats
-
Mar 7, 2006
Grant Date -
Sep 19, 2002
app pub date -
Sep 10, 2001
filing date -
Mar 13, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A controller of a reproduction terminal determines whether a block read from a memory card is an encrypted block or a non-encrypted block, and then applies the read block to a content decrypting circuit. The controller stops supplying the block to the content decrypting circuit when a predetermined number of non-encrypted blocks are continuously read from the memory card. Consequently, reproduction of the encrypted content data can be stopped if the encrypted content data includes a continuous non-encrypted portion in which the number of non-encrypted blocks is equal to or larger than a predetermined non-zero number.
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