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1. 发明授权

US06415031B1 Selective and renewable encryption for secure distribution of video on-demand 有权
标题翻译：选择性和可再生加密，以便视频点播安全分发
公开(公告)号：US06415031B1
公开(公告)日：2002-07-02
申请号：US09528580
申请日：2000-03-20
申请人： Michael R. Colligan , Yong Ho Son , Christopher Goode
发明人： Michael R. Colligan , Yong Ho Son , Christopher Goode
IPC分类号： H04N7167
CPC分类号： H04N21/23473 , H04N7/1675 , H04N7/17309 , H04N21/23476 , H04N21/26609
摘要： Selective encryption is provided in a process which includes: determining whether a predetermined criterion is satisfied; setting a selective encryption status field if the predetermined criterion is satisfied; and encrypting an unencrypted payload to generate an encrypted payload, and constructing a packet with the encrypted payload, if the predetermined criterion is satisfied. The predetermined criterion may be one of several criteria, each of which reduce the required amount of encryption and decryption while maintaining a high level of security. Renewable encryption is provided in a process which includes: copying a first encrypted digital video program from a remote server to a video source; decrypting the first encrypted digital video program using a first key to generate an unencrypted digital video program; encrypting the unencrypted digital video program using a second key to generate a second encrypted digital video program; transmitting the second encrypted digital video program from the video source to the remote server; and deleting the first encrypted digital video program from the remote server.
摘要翻译：在包括：确定是否满足预定标准的过程中提供选择性加密; 如果满足预定标准，则设置选择性加密状态字段; 并且如果满足预定标准，则加密未加密的有效载荷以生成加密的有效载荷，以及构造具有加密的有效载荷的分组。预定标准可以是几个标准之一，每个标准减少了所需的加密和解密量，同时保持了高水平的安全性。提供可再生加密的过程包括：将第一加密数字视频节目从远程服务器复制到视频源; 使用第一密钥解密所述第一加密数字视频节目以生成未加密的数字视频节目; 使用第二密钥加密未加密的数字视频节目以产生第二加密的数字视频节目; 将第二加密数字视频节目从视频源发送到远程服务器; 以及从所述远程服务器删除所述第一加密数字视频节目。

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