一种有效的数字内容保护系统证书吊销问题解决方案

现有数字内容保护系统在处理设备吊销同题时,都要求在设备中维护一个完整的证书吊销信息列表,对设备存储量的要求很高并且具有可预见的不完备性.本文通过对设备生命周期内所能连接的其他设备的总数加以限制,在设备中只需维护本地的合法设备和不合法设备列表.设备维护的本地列表对存储量的要求是一个小的常数,系统在不增加计算开销的同时可以对吊销信息进行完备处理.所提出的方法可以在家庭网络中统一部署,用来实现对系统吊销问题的统一处理.

An efficient solution to the certificate revocation problem in a digital content protection system

There is a predictable imperfection and high demand on the device memory capacity to store the whole system renewability messages when current content protection systems are used to deal with certificate revocation. In this paper, only local legal devices and illegal devices need to be recorded in the memory by limiting the total number of other devices linked with the main device to a constant. Then the capacity needed decreases to a smaller constant, but it is enough for the system to treat certificate revocation perfectly without increasing the computational cost. The proposed method can be deployed in home networks to provide a universal solution to the certificate revocation problem.