Information security – Prevention of unauthorized use of data including prevention... – Access control
Reexamination Certificate
2007-10-02
2007-10-02
Sheikh, Ayaz (Department: 2131)
Information security
Prevention of unauthorized use of data including prevention...
Access control
C726S031000, C380S201000, C380S229000, C380S230000, C380S242000, C705S051000
Reexamination Certificate
active
10391718
ABSTRACT:
In one embodiment, a content license is created that defines parameters for accessing a piece of digital content. A first logical expression in the content license defines a plurality of playback devices that are authorized to access the piece of digital content. A second logical expression in the content license defines at least one time interval when the plurality of playback devices are authorized to access the piece of digital content. The content license is used to access the piece of digital content.
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Moorthy Aravind K
Sony Corporation
Sony Electronics Inc.
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