Enciphering apparatus and method, deciphering apparatus and method as well as information processing apparatus and method
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United States of America Patent
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Jul 3, 2001
Issued Date -
N/A
app pub date -
Apr 14, 1998
filing date -
Apr 23, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
The invention provides an enciphering apparatus and method, a deciphering apparatus and method and an information processing apparatus and method by which illegal copying can be prevented with certainty. Data enciphered by a 1394 interface of a DVD player is transmitted to a personal computer and a magneto-optical disk apparatus through a 1394 bus. In the magneto-optical disk apparatus with which a change to a function is not open to a user, the received data is deciphered by a 1394 interface. In contrast, in the personal computer with which a change to a function is open to a user, the enciphered data is deciphered using a time variable key by a 1394 interface, and a result of the decipherment is further deciphered using a session key by an application section.
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