DVB/IPTV dual-mode interactive business protection system

Abstract

A DVB / IPTV dual-mode interactive business protection system comprises a client end subsystem, a front end subsystem, an authentication authorization subsystem, a subscriber management system, a program stream management system, and a program information management system; the client end subsystem, the CA front end subsystem and the authentication authorization subsystem are the main portion; the subscriber management system, the program stream management system, and the program information management system belong to a peripheral auxiliary system. The DVB / IPTV dual-mode interactive business protection system supports DVB and IPTV video scrambling, provides a controllable scrambling depth control strategy and adaptive scrambling of program content, and supports more than three secret key management modes; secret key length selection above 128 bits and distributed packaging of large size content are realized; the protection system supports safety and business monitoring of the content based on digit watermarking. The DVB / IPTV dual-mode interactive business protection system supports DVB / IPTV dual modes, introduces secret key update batch processing strategy and a distributed authentication authorization scheme, provides secret key real time update and distribution in a million user scale, reduces system overhead, enhances whole secret key updating capacity, improves system safety, and provides a flexible changeable protection mechanism for pay TV business.

Description

technical field [0001] The invention relates to the field of information security, in particular to the key technology of a broadband interactive television system and a two-way asymmetrical digital television system. Background technique [0002] In the construction and development of interactive video systems such as iDTV (interactive digital TV) and IPTV (interactive Internet TV), the protection and control of interactive video service content is becoming an important bottleneck affecting the promotion of interactive video services, which involves content protection, transmission technologies for protection, access control, piracy tracking and content monitoring. [0003] The traditional video service protection system is built on a one-way network. In order to fully transmit important content such as scrambling control words, user authorization information, and management information to the client, the basic idea of ​​layer-by-layer defense is adopted. The system structu...

AI Technical Summary

Problems solved by technology

[0009] For traditional CA systems, video sources are collected and transmitted in plain text, which poses a threat to the security of video sources

In addition, the existing storage methods, whether they are direct storage or encrypted storage of received files, have security risks

[0010] Ordinary scrambling technology cannot realize the selection and control of scrambling depth, and cannot distinguish important and non-important information. The scrambling intensity is often too large, and the scrambling effect is not good.

Images