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1. 发明授权

US08023655B2 System, method, and service for tracing traitors from content protection circumvention devices 有权
标题翻译：从内容保护规避设备跟踪叛徒的系统，方法和服务
公开(公告)号：US08023655B2
公开(公告)日：2011-09-20
申请号：US12134113
申请日：2008-06-05
申请人： Hongxia Jin , Jeffrey Bruce Lotsplech , Philip Anastasios Zigoris
发明人： Hongxia Jin , Jeffrey Bruce Lotsplech , Philip Anastasios Zigoris
IPC分类号： H04L9/00
CPC分类号： H04L9/32 , G09C5/00 , H04L9/0891 , H04L2209/606
摘要： A traitor tracing system generates a hypothesized model of the circumvention device that models a hypothesized set of device keys compromised by the circumvention device. The system iteratively invokes a subset tracing system to identify a compromised device key until substantially all the compromised device keys in the set of compromised device keys are identified so as to disable the circumvention device. A subset tracing system generates a circumvention device model that models behavior of a circumvention device using prior knowledge and The system iteratively selects and applies to the circumvention device a test based on the hypothesized model and the circumvention device model and receives a response from the circumvention device indicating a success of the test in playing protected content on the circumvention device. The system updates the hypothesized model using the received response, the selected test, a current version of the hypothesized model, and a current version of the circumvention device model to focus the test selecting process in determining the device keys obtained from the traitor.
摘要翻译：叛逆者追踪系统产生对避开装置的假设模型，以模拟被规避装置损害的假设的一组装置钥匙。系统迭代地调用子集跟踪系统以识别受损的设备密钥，直到被识别的设备密钥集中的基本上所有受损设备密钥被识别为禁用规避设备。子集跟踪系统生成规避设备模型，其使用先验知识对规避设备的行为进行建模，并且系统基于假设模型和规避设备模型迭代地选择并应用到规避设备的测试，并且接收来自规避设备的响应表明在规避设备上播放受保护内容的测试成功。系统使用接收到的响应，所选择的测试，假设模型的当前版本和规避设备模型的当前版本来更新假设模型，以将测试选择过程集中在确定从叛徒获得的设备密钥。

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