公开(公告)号：US08532292B2

公开(公告)日：2013-09-10

申请号：US12300999

申请日：2007-05-15

申请人： Masaru Fukushima ,  Shuichi Sugie ,  Shinsaku Kiyomoto ,  Tatsuo Shibata ,  Keigo Majima ,  Takeshi Kimura ,  Hideki Kokubun ,  Go Ohtake

发明人： Masaru Fukushima ,  Shuichi Sugie ,  Shinsaku Kiyomoto ,  Tatsuo Shibata ,  Keigo Majima ,  Takeshi Kimura ,  Hideki Kokubun ,  Go Ohtake

IPC分类号： H04N7/167 ,  G06F21/00

CPC分类号： H04L9/065 ,  H04L2209/56 ,  H04L2209/601 ,  H04L2209/80 ,  H04N7/1675 ,  H04N21/41407 ,  H04N21/4405 ,  H04N21/63345

摘要： Provided is a system far receiving a initialization packet containing an initial vector for initializing stream encryption algorithm and an identifier of a key for decrypting an encrypted stream, initializing a decryption module, and decrypting the encrypted stream, wherein the system stores an identifier of a key which is needed to decrypt a next program in a initialization packet of a current program and informs a user of whether a desired key has been acquired or not at timing close to start time of the next program.

摘要翻译： 提供了一种远程接收包含用于初始化流加密算法的初始向量和用于解密加密流的密钥的标识符，初始化解密模块和解密加密流的初始化包的系统，其中系统存储密钥的标识符 需要解密当前节目的初始化包中的下一节目，并且在接下来节目的开始时刻的定时通知用户是否已经获取了所需的密钥。