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Method, network unit, terminal and system for providing broadcast/multicast service

A multicast service and network unit technology, applied in the field of communication, can solve problems such as business security loopholes and difficulties

Inactive Publication Date: 2008-02-06
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the effective time of the BAK on the terminal side is not specified, if the use of the BAK on the network side is earlier than the effective time of the service subscribed by the user, the user can decrypt the service content after receiving the BAK, which will cause business There are gaps in security
[0008] -Since the BAK only has the end time "BAK_Expire" of the valid period, the terminal does not know when to start using the BAK, so it is very difficult to implement pay per view or content based pay

Method used

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  • Method, network unit, terminal and system for providing broadcast/multicast service
  • Method, network unit, terminal and system for providing broadcast/multicast service
  • Method, network unit, terminal and system for providing broadcast/multicast service

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Embodiment Construction

[0021] In order to better understand the present invention, first, the security architecture of the BCMCS in the prior art is described. The security architecture of the BCMCS in the prior art includes the following key levels.

[0022] -Registration key RK: identifies the user and uniquely corresponds to the user.

[0023] - Broadcast Access Key BAK: 128 bit Broadcast Access Key. Provides access to one or more broadcast / multicast streams of a specific set of BCMCS programs for a certain period of time (eg, a day, a week, or a month). Each group of encrypted BCMCS programs has a different BAK value.

[0024] - Session key SK: the key used by the last user to encrypt and decrypt business content.

[0025] -Temporary key TK: used to protect BAK transmission.

[0026] As shown in FIG. 1 , in the security architecture of the BCMCS in the prior art, it is firstly based on a registration key RK and a 128-bit broadcast access key BAK. Before use, both the User Identity Module (U...

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Abstract

The present invention relates to the methods, the network units, the terminals and the communication systems of the broadcast / multicast services which are used for providing to the terminal. The present invention is characterized in that: sending the broadcast accessing key(BAK) to the terminal based on the subscribing of the terminal is provided with the starting time(VF) and the ending time(VT) of the period of validity; sending the broadcast accessing key and the starting time as well as the ending time of the period of validity to the terminal; utilizing the broadcast accessing key to decrypt the received and encrypted broadcast / multicast service data based on the starting time as well as the ending time of the period of validity.

Description

technical field [0001] The present invention relates to the communication field, and in particular, relates to a technology for providing a broadcast / multicast service (BCMCS, Broadcast Multicast Service) to a terminal. Background technique [0002] With the development of the times, people have more and more requirements for services, and operators are also developing a variety of services in order to meet this demand of the market. Among them, with the development of mobile TV services, broadcast / multicast services are particularly concerned, and the purpose of BCMCS is to provide broadcast / multicast services to authorized (subscription) users. Content providers provide content to BCMCS users through a cellular system. The content can be IP multimedia messages such as audiovisual data, or broadcast multimedia messages. A content provider can be part of a service network or an independent entity. [0003] If BCMCS access is based on subscription, then only authorized use...

Claims

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Application Information

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IPC IPC(8): H04L9/32H04L12/18H04N7/16
Inventor 朱庆朱红儒周玉龙
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD