CONTENT SECURITY TRANSMISSION PROTECTION DEVICE AND SYSTEM THEREOF, AND CONTENT SECURITY TRANSMISSION METHOD

摘要

The invention relates to the field of information security technology. A content security transmission protection device and system thereof are provided, which separate data transmission function with data management/processing function of a digital interface. A content security transmission method is also provided. Said device (1,3) comprises a digital interface and a management/processing unit(2,4)，wherein the management/processing unit (2,4) is configured on a specific chip in said device (1,3), used for updating a revocation list stored in and collecting information for downstream devices. A transmission device and a repeater in said system both comprise digital interfaces and management/processing units (2,4). The invention utilizes the software in CPU of a specific chip for realizing data management/processing function, without increasing cost. The device can increase random functions, improve flexibility and expandability of the system, and largely reduce scale and cost of the chip in the digital interface, namely reduce development difficulty of the digital interface. Therefore, only simple data transmission function is realized in the digital interface, thus processing in a quick manner.