Implementation method and apparatus for multimedia broadcast multiple ciphering and deciphering

A multimedia broadcasting and multiple encryption technology, which is applied in the direction of broadcasting devices, broadcasting related systems, specific information broadcasting systems, etc., to achieve the effect of improving security

Inactive Publication Date: 2009-07-08
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of mobile multimedia services, the current single CA system can no longer meet the needs of more and more services with high security requirements, such as TV shopping, online transactions, stock transactions, etc., so a more secure encryption method

Method used

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  • Implementation method and apparatus for multimedia broadcast multiple ciphering and deciphering
  • Implementation method and apparatus for multimedia broadcast multiple ciphering and deciphering
  • Implementation method and apparatus for multimedia broadcast multiple ciphering and deciphering

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Embodiment Construction

[0055] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0056] The structure of the mobile multimedia broadcasting front-end system is as follows: Figure 4 As shown, it includes a program server, a data server, a scrambler, an ESG (Electronic Service Guide, Electronic Service Guide) server, a multiplexer, a modulating device, and a transmitting device, wherein:

[0057] The program and data server is used to encode the program stream, divide and encapsulate data (data broadcast data, such as stocks, information, etc.) into data packets, and send the encoded program stream and data packets to the scrambler; Program and data servers can be integrated together as in this embodiment, or can also be set separately;

[0058] The scrambler is used to complete level-1 CA scrambling and encryption, and level-2 and above CA encryption. Specifically, when level-1 CA scrambles, use CW1 (Control Word, contro...

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Abstract

The invention provides a multimedia broadcasting multiple encryption and decryption method and an apparatus for improving the safety of a mobile multimedia broadcasting system. The encryption method comprises: performing a first order scrambling to a coded program stream and/or data pack, performing a first order encryption and second a order encryption to a used cipher key when scrambling, wherein the first scrambling employs the program stream and/or data pack as objects, the first encryption is to encrypt the cipher key during the first scrambling and to obtain a first entitlement control message (ECM1) and a first entitlement management message (EMM1), the second order encryption comprises twice encryption, the first encryption employs a second cipher key to encrypt the obtained ECM1 and the EMM1 after the last order encryption, the second encryption is to encrypt the second cipher key; encapsulating the encryption of the scrambled program stream and/or data pack and the obtained results after the second encryption to service integration frames, allocating a control information table and encapsulating the table to a control integration frame; modulating the encapsulated integration frame to an electromagnetic wave on a physical channel and transmitting the electromagnetic wave to the air.

Description

technical field [0001] The invention relates to the field of digital mobile communication, in particular to a method and device for realizing multi-encryption and decryption of multimedia broadcasting. Background technique [0002] In recent years, digital mobile multimedia broadcasting technology and standards have developed rapidly, such as DVB-H (Digital Video Broadcasting Handheld Receiver: Digital Video Broadcast Handheld) in Europe, MediaFLO (Media Single Forward Link: Media Forward Link Only) in the United States and China's CMMB (China Mobile Multimedia Broadcasting: China Mobile Multimedia Broadcasting), etc., provides many service contents for its end users. If advertisements, weather forecasts, news, sports programs, variety shows, multimedia radio dramas, movies and other programs, users can choose according to their own hobbies. Select a service program for mobile multimedia broadcasting. [0003] Conditional Access System CA (Conditional Access System) refers ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L9/08H04H60/72H04H60/82
Inventor 韦福
Owner ZTE CORP
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