Data recording apparatus, data recording method, and data transfer system
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United States of America Patent
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Jun 5, 2007
Grant Date -
Nov 28, 2002
app pub date -
Apr 15, 2002
filing date -
Apr 17, 2001
priority date (Note) -
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Abstract
The present invention is intended to significantly reduce the content data processing and transfer times by skipping root key checking processing, when transmitting a plurality of pieces of encrypted content data stored in a primary recording medium to a secondary recording medium along with key information of these plural pieces of content data, if the key information for a piece of content data to be transmitted from the primary recording medium is the same as the key information for an already transmitted piece of content data.
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