公开(公告)号：EP1418750A1

公开(公告)日：2004-05-12

申请号：EP02257789.4

申请日：2002-11-11

Applicant: STMicroelectronics Limited

Inventor： Dellow, Andrew Dellow ,  Cordero, Rodrigo

IPC: H04N5/00

CPC classification number: H04N21/42623 ,  H04N21/26613 ,  H04N21/4623

Abstract: A semiconductor integrated circuit for the processing of conditional access television signals comprises an input interface for receiving encrypted television signals and an output interface for output of decrypted television signals. Control signals broadcast with the television signals include control words and common keys. The common keys are received in encrypted form, encrypted according to a secret key unique to each semiconductor integrated circuit. The input interface is connected to a decryption circuit whereby the only manner of providing the common keys to the circuit are in encrypted form encrypted according to the secret key. Due to the monolithic nature of the circuit, no secrets are exposed and the system is secure.

Abstract translation: 用于处理条件接收电视信号的半导体集成电路包括用于接收加密的电视信号的输入接口和用于输出解密的电视信号的输出接口。 用电视信号广播的控制信号包括控制字和公共密钥。 公共密钥以加密形式接收，根据每个半导体集成电路独有的秘密密钥进行加密。 输入接口连接到解密电路，由此向电路提供公共密钥的唯一方式是根据秘密密钥加密的加密形式。 由于电路的整体性质，没有暴露的秘密和系统是安全的。

公开(公告)号：EP1467565A1

公开(公告)日：2004-10-13

申请号：EP03252186.6

申请日：2003-04-07

Applicant: STMicroelectronics Limited

Inventor： Dellow, Andrew Dellow ,  Cordero, Rodrigo

IPC: H04N7/16 ,  H04N7/167 ,  H04N5/00

CPC classification number: H04N21/42623 ,  G06F21/10 ,  H04N7/165 ,  H04N21/4405 ,  H04N21/4623

Abstract: A semiconductor integrated circuit (30) for the processing of conditional access television signals comprises an input interface (43) for receiving encrypted television signals and an output interface (45) for output of decrypted television signals. Control signals broadcast with the television signals include control words and common keys. Entitlement messages are received in encrypted form, encrypted according to a secret key unique to each semiconductor integrated circuit. The input interface is connected to a decryption circuit (32) whereby the only manner of providing the common keys to the circuit are in encrypted form encrypted according to the secret key. Due to the monolithic nature of the circuit, no secrets are exposed and the system is secure. Alternatively, the entitlement messages are encrypted for decryption with the common keys and a unique ID stored in the circuit is compared with an ID in a received entitlement message. Only if the received and stored IDs match can the rights be stored and used.

Abstract translation: 用于处理条件接收电视信号的半导体集成电路（30）包括用于接收加密的电视信号的输入接口（43）和用于输出解密的电视信号的输出接口（45）。 用电视信号广播的控制信号包括控制字和公共密钥。 以加密形式接收授权消息，根据每个半导体集成电路独有的秘密密钥进行加密。 输入接口连接到解密电路（32），由此向电路提供公共密钥的唯一方式是根据秘密密钥加密的加密形式。 由于电路的整体性质，没有暴露的秘密和系统是安全的。 或者，授权消息被加密以用公共密钥进行解密，并且存储在电路中的唯一ID与接收到的授权消息中的ID进行比较。 只有收到和存储的ID匹配才能存储和使用权限。