Information recording apparatus, information reproducing apparatus, and information distribution system
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United States of America Patent
Stats
-
Nov 5, 2002
Grant Date -
Jan 3, 2002
app pub date -
May 13, 1998
filing date -
May 13, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An information recording apparatus comprises an encryption section encrypting contents information and also a license condition referred to limit use of the contents information and a decoding key for decoding the encrypted contents information to generate license information, and a recording section recording the encrypted contents information and the generated license information on a recording medium. An information reproducing apparatus comprises a decoder unit decoding the license information recorded on the recording medium using a second decoding key for decoding the license information and deciding on the basis of the license condition contained in the decoded license information whether the contents information can be used. If it is decided that the contents information can be used, the encrypted contents information recorded on the recording medium is decoded using the first decoding key contained in the decoded license information.
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