发明授权
US07926096B2 Enforcing time-based transaction policies on devices lacking independent clocks
有权
对缺乏独立时钟的设备执行基于时间的交易策略
- 专利标题： Enforcing time-based transaction policies on devices lacking independent clocks
- 专利标题（中）： 对缺乏独立时钟的设备执行基于时间的交易策略
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申请号： US11216363申请日： 2005-08-31
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公开(公告)号： US07926096B2公开(公告)日： 2011-04-12
- 发明人: Asad Mahboob Ali , Bertrand du Castel , Apostol Vassilev , Sylvain Prevost , Kapil Sachdeva
- 申请人： Asad Mahboob Ali , Bertrand du Castel , Apostol Vassilev , Sylvain Prevost , Kapil Sachdeva
- 申请人地址： FR Meudon
- 专利权人： Gemalto SA
- 当前专利权人： Gemalto SA
- 当前专利权人地址： FR Meudon
- 代理机构： The Jansson Firm
- 代理商 Pehr B. Jansson
- 主分类号： H04L29/06
- IPC分类号： H04L29/06
摘要：
A system and a method for operating a device that is not capable of independently maintaining a local time clock to enforce a time-based transaction policy that requires a reliable time reference. The device establishes a secure communications channel to one or more network-attached time sources and inquires of each of the network-attached time-sources as to the current time using the secure communications channel. The device receives the current time from the network-attached time-sources and uses the received current times to estimate a current calendar time and to compute a reliability index associated with the estimated current calendar time. The device uses the estimated current calendar time and reliability index to enforce the time-based transaction policy.
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