Invention Grant
- Patent Title: Digital rights management using trusted time
- Patent Title (中): 数字版权管理使用可信时间
-
Application No.: US12910304Application Date: 2010-10-22
-
Publication No.: US08239961B2Publication Date: 2012-08-07
- Inventor: Marc E. Strohwig , Yoji Kawamoto , Motohiko Nagano , Pierre Chavanne , Norifumi Goto , Oscar H. Steele, III , Eric John Swenson
- Applicant: Marc E. Strohwig , Yoji Kawamoto , Motohiko Nagano , Pierre Chavanne , Norifumi Goto , Oscar H. Steele, III , Eric John Swenson
- Applicant Address: JP Tokyo US NJ Park Ridge
- Assignee: Sony Corporation,Sony Electronics Inc.
- Current Assignee: Sony Corporation,Sony Electronics Inc.
- Current Assignee Address: JP Tokyo US NJ Park Ridge
- Agency: Fitch, Even, Tabin & Flannery, LLP
- Main IPC: G06F7/04
- IPC: G06F7/04
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.
Public/Granted literature
- US20110041186A1 DIGITAL RIGHTS MANAGEMENT USING TRUSTED TIME Public/Granted day:2011-02-17
Information query
