Data backup method and storage medium for use with content reproduction apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Apr 17, 2003
app pub date -
Apr 11, 2002
filing date -
Apr 12, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The body of content, such as audio or AV content, is provided in encrypted form free of charge. User of a content reproduction apparatus can obtain the content body free at any time, and thus a need to back up the content body can be eliminated. Content key data for decrypting the content is, on the other hand, chargeable and provided for payment, and the user only has to back up this content key data. To prevent the backed-up content key data from being unfairly used by any other apparatus, an apparatus-specific code imparted to the user's content reproduction apparatus is backed up to a backup storage medium along with the content key data, and the backed-up content key data is allowed to be restored from the storage medium only to an apparatus having the same apparatus-specific code as the user's content reproduction apparatus. In this way, the user's content reproduction apparatus can perform an efficient backup of chargeable content.
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