Digital rights management using trusted time

Details Digital rights management using trusted time Digital rights management using trusted time

2005-11-28

2010-12-28

Smithers, Matthew B (Department: 2437)

Information security

Prevention of unauthorized use of data including prevention...

C713S178000

Reexamination Certificate

active

07861308

ABSTRACT:
A method for monitoring time so that the use of protected content can be controlled includes receiving a trusted time value from a trusted authority external to a client device. When the client is no longer in communication with the trusted authority, the previously-received trusted time value is updated by use of the client's operating system counter so that a calculated trusted time value is derived for content license evaluation purposes.

REFERENCES:
patent: 5892900 (1999-04-01), Ginter et al.
patent: 6728880 (2004-04-01), Sites
patent: 2002/0019814 (2002-02-01), Ganesan
patent: 2002/0038231 (2002-03-01), Hasebe et al.
patent: 2002/0048369 (2002-04-01), Ginter et al.
patent: 2002/0048396 (2002-04-01), Bewley et al.
patent: 2002/0056042 (2002-05-01), van der Kaay et al.
patent: 2002/0169974 (2002-11-01), McKune
patent: 2002/0183864 (2002-12-01), Apel et al.
patent: 2003/0063750 (2003-04-01), Medvinsky et al.
patent: 2003/0204738 (2003-10-01), Morgan
patent: 2003/0233553 (2003-12-01), Parks et al.
patent: 2005/0091312 (2005-04-01), Kuriya
patent: 2005/0133582 (2005-06-01), Bajikar
patent: 2005/0138357 (2005-06-01), Swenson et al.
patent: 2005/0204209 (2005-09-01), Vataja
patent: 2005/0278716 (2005-12-01), Koppen et al.
patent: 2006/0107042 (2006-05-01), Kohmoto
patent: 2006/0248596 (2006-11-01), Jain et al.
patent: 2006/0294593 (2006-12-01), Eldar et al.
Notice of Allowance from U.S. Appl. No. 10/957,109 mailed May 24, 2009.

Affiliated with

Also associated with

Rating

Digital rights management using trusted time does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital rights management using trusted time, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital rights management using trusted time will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4217723