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    • 70. 发明授权
    • Rebinding of content title keys in clusters of devices with distinct security levels
    • 在具有不同安全级别的设备群集中重新绑定内容标题密钥
    • US08391481B2
    • 2013-03-05
    • US12651382
    • 2009-12-31
    • Robert Glenn DeenHongxia JinSigfredo Ismael NinDulce B. Ponceleon
    • Robert Glenn DeenHongxia JinSigfredo Ismael NinDulce B. Ponceleon
    • H04L29/06
    • H04L9/0836H04L9/0891H04L2209/601
    • According to one embodiment of the present invention, a system, method, and computer program product is provided for rebinding title keys in clusters of devices with distinct security levels in broadcast encryption systems. The method includes receiving a new management key and unbinding an encrypted title key with a previously used management key, the title key having a security class and residing in a title key block for a device having a security class, the device being in a cluster of devices including devices having a plurality of security classes. If the device security class is lower that the title key security class, the unbound title key is partially rebound with the new management key. the partially rebound title key is then saved in the title key block for the device.
    • 根据本发明的一个实施例,提供了一种系统,方法和计算机程序产品,用于在广播加密系统中具有不同安全级别的设备群中重新标识标题密钥。 所述方法包括:接收新的管理密钥,并将加密的标题密钥与先前使用的管理密钥解除绑定,所述标题密钥具有安全级别,并且驻留在具有安全等级的设备的标题密钥块中,所述设备处于 设备包括具有多个安全等级的设备。 如果设备安全级别低于标题密钥安全级别,则使用新的管理密钥部分地弹出未绑定的标题密钥。 然后将部分反弹的标题密钥保存在设备的标题密钥块中。