Content use management system, content playback apparatus,...

Details Content use management system, content playback apparatus,... Content use management system, content playback apparatus,...

2004-10-20

2010-06-29

Hewitt, II, Calvin L (Department: 3685)

Data processing: financial, business practice, management, or co

Business processing using cryptography

Usage protection of distributed data files

C705S051000, C705S057000, C705S071000, C705S075000

Reexamination Certificate

active

07747532

ABSTRACT:
A license corresponding to digital content includes reliable reference date/time information. A content playback apparatus includes a reference-date/time-information storage unit for storing the reference date/time information. The reference-date/time-information storage unit is updated to maintain the reference date/time information at the latest version. When the digital content is to be played back, the system date/time of the content playback apparatus is compared with the reference date/time to validate the system date/time.

REFERENCES:
patent: 5703950 (1997-12-01), Jovanovich et al.
patent: 6567107 (2003-05-01), Stannard
patent: 7366834 (2008-04-01), McGovern et al.
patent: 2002/0002466 (2002-01-01), Kambayashi et al.
patent: 2002/0046181 (2002-04-01), Story et al.
patent: 2002/0161718 (2002-10-01), Coley et al.
patent: 2002/0194010 (2002-12-01), Bergler et al.
patent: 2003/0069854 (2003-04-01), Hsu et al.
patent: 2003/0177149 (2003-09-01), Coombs
patent: 2003/0195855 (2003-10-01), Parks et al.
patent: 2003/0233553 (2003-12-01), Parks et al.
patent: 2004/0049521 (2004-03-01), Borrowman
patent: 2004/0236788 (2004-11-01), Sato et al.
patent: 2005/0038753 (2005-02-01), Yen et al.
patent: 2006/0265337 (2006-11-01), Wesinger, Jr.
patent: 2002-258965 (2002-09-01), None
patent: 2003-22339 (2003-01-01), None
patent: 2003-59180 (2003-02-01), None
patent: WO 03/012708 (2003-02-01), None

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