Encrypting/decrypting system and encrypting/decrypting method for interactive network television

Abstract

The invention discloses an encrypting/decrypting system and an encrypting/decrypting method for an interactive network television. By using a cryptographic algorithm approved by the national cryptogram management department, adopting a secure three-layer key system, namely a program content key, an authorized key and a user personal ECC key pair, and adopting a mature identity authentication technique, the security of a service system is protected, so the identity authentication problem of the system can be solved, and simultaneously the security protection for on-demand and living broadcast services also can be realized.

Description

technical field [0001] The invention relates to a digital security system and method of an interactive network TV, in particular to an encryption / decryption system and an encryption / decryption method of an interactive network TV. Background technique [0002] Since the technology of interactive network television (IPTV) has just started in my country, and the IPTV business is also in the pilot process, compared with security technology, operators are more concerned about the diversity of business system functions. Therefore, the currently used IPTV business system Most of them do not use systematic password security technology to effectively protect media content. [0003] Although in the typical IPTV DRM model represented by OMA, a cryptographic algorithm has been introduced to realize the security protection of the media stream, but due to the different emphases of each IPTV business model, the security system design and specific implementation methods There are big differ...

AI Technical Summary

Problems solved by technology

[0005] 1) Since DVB's CA technology is essentially a one-way broadcast network rating control technology, although IP network program broadcasting can be realized after IP transformation, it cannot effectively use the interactive characteristics of IP network to realize online identity authentication of users. Unable to effectively prevent illegal viewing;

[0006] 2), IPCAS technology only provides security encryption during program stream transmission, and cannot provide security protection for program content after landing. Therefore, it cannot effectively prevent users from sharing, distributing and other illegal dissemination of programs they have received;

[0007] 3) IPCAS uses a common scrambling algorithm to encrypt the program. The strength of the scrambling algorithm is low and cannot effectively resist violent attacks based on the powerful computing power of the Internet

[0011] Most of the cryptographic algorithms used in the above two technical systems are foreign algorithms, and the security and intellectual property issues of the algorithms will bring certain obstacles to the application of the products; at present, the commercial cryptographic algorithms of the State Cryptography Administration can fully meet the requirements. Application requirements

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