Information security – Prevention of unauthorized use of data including prevention... – Access control
Reexamination Certificate
2007-01-02
2007-01-02
Revak, Christopher (Department: 2131)
Information security
Prevention of unauthorized use of data including prevention...
Access control
C705S052000, C705S057000
Reexamination Certificate
active
09959827
ABSTRACT:
A management apparatus stores pairs of copyrighted contents and numbers of permitted check-outs. On being requested to perform check-out for a semiconductor memory card, the management apparatus records an audio object (AOB) corresponding to a content in the semiconductor memory card, assigns a content ID to the AOB, and decrements a corresponding number of permitted check-outs. An editing and playback apparatus plays back the AOB recorded in the semiconductor memory card. The editing and playback apparatus edits the AOB and assigns a content ID, which is the same as the content ID of the original AOB, to each new AOB obtained by the editing. A local storage holds history information including a media ID and the content ID assigned to the original AOB. On being requested to perform check-in for the semiconductor memory card, the management apparatus sets, in a non-playable state, the AOB assigned a content ID that is the same as the content ID in the history information and increments the number of permitted check-outs.
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SDMI Portable Device Specification, Part 1, Version 1.0 (35 pages); Jul. 8, 1999.
Amendment 1 to SDMI Portable Device Specification, Part 1, Version 1.0 (2 pages); Sep. 23, 1999.
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Harada Shunji
Hirota Teruto
Inoue Shinji
Matsushima Hideki
Tokuda Katsumi
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