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    • 3. 发明申请
    • Proactive forced renewal of content protection implementations
    • 主动强制更新内容保护实施
    • US20050228988A1
    • 2005-10-13
    • US10823947
    • 2004-04-13
    • C. TrawMichael Ripley
    • C. TrawMichael Ripley
    • H04L9/00H04L9/08
    • H04L9/0891H04L9/083H04L2209/60
    • A system for proactive forced renewal of content protection implementations in devices includes a key generation facility to generate and allocate keys for the devices, and to generate revocation data corresponding to revoked keys in response to at least one of a security compromise and on a periodic basis independent of a security compromise; and a device manufacturer to receive the keys from the key generation facility, to embed the keys in content protection implementations for the devices, to distribute the devices, and to renew the content protection implementations in devices after the devices are distributed, in response to at least one of a security compromise and on a periodic basis independent of a security compromise.
    • 用于主动强制更新设备中的内容保护实现的系统包括:密钥生成设备,用于生成和分配设备的密钥,以及响应于安全隐私和周期性基础中的至少一个产生对应于撤销密钥的吊销数据 独立于安全妥协; 以及设备制造商,用于从密钥生成设备接收密钥,将密钥嵌入到用于设备的内容保护实现中,分发设备,以及在设备被分发之后更新设备中的内容保护实现,响应于 至少一个安全妥协,并且在定期的基础上独立于安全妥协。
    • 4. 发明申请
    • Public Key Media Key Block
    • 公钥媒体密钥块
    • US20080075284A1
    • 2008-03-27
    • US11923635
    • 2007-10-24
    • Carl EllisonC. Brendan TrawMichael RipleyGary Graunke
    • Carl EllisonC. Brendan TrawMichael RipleyGary Graunke
    • H04N7/167H04L9/08H04L9/14
    • G11B20/0021G11B20/00086G11B20/00188G11B20/00224G11B20/00253G11B20/00362G11B20/00492G11B20/00528H04L9/0825H04L9/0897H04L2209/60
    • Protected content distribution is accomplished by a first entity generating a set of asymmetric key pairs, creating a plurality of sets of private keys by selecting a combination of private keys from the set of asymmetric key pairs for each created set, and distributing the sets of private keys to playback devices. A second entity produces protected content including encrypted content and a public key media key block, encrypts a symmetric content key with each public key in the set of asymmetric key pairs to form the public key media key block and encrypts a content title with the symmetric content key to form the encrypted content. A playback device stores one set of private keys, receives the protected content, and decrypts and plays the content title stored in the protected content when a selected one of the set of private keys stored by the playback device successfully decrypts the encrypted symmetric content key stored in the public key media key block of the received protected content.
    • 受保护的内容分发由生成一组非对称密钥对的第一实体完成,通过从每个创建的集合的非对称密钥对集合中选择私钥的组合来创建多组私钥,并且分发私有密钥集合 播放设备的键。 第二实体产生包括加密内容和公共密钥媒体密钥块的受保护内容,使用非对称密钥对集合中的每个公开密钥对对称内容密钥进行加密,以形成公共密钥媒体密钥块,并加密具有对称内容的内容标题 密钥来形成加密的内容。 回放设备存储一组专用密钥,接收受保护的内容,并且当由重放设备存储的一组专用密钥中的所选择的一个成功地解密存储的加密的对称内容密钥时,解密并播放存储在受保护内容中的内容标题 在接收到的受保护内容的公钥媒体密钥块中。