Method for receiving and deleting media data key

A technology of media data and deletion methods, applied in digital transmission systems, user identity/authority verification, electrical components, etc.

Active Publication Date: 2006-11-15
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for receiving and deleting media data keys for the defects of existing media data key receiving and deleting methods, which can si

Method used

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  • Method for receiving and deleting media data key
  • Method for receiving and deleting media data key
  • Method for receiving and deleting media data key

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Embodiment Construction

[0021] In the present invention, the mobile communication terminal requests a key from the communication network authorization management system every time the mobile communication terminal uses the mobile phone TV, and the communication network authorization management system sends the passwords of all customized channels to the mobile communication terminal according to the user card. When any key decrypts the media data, all received keys are also deleted.

[0022] like figure 1 As shown, it is a schematic structural diagram based on the receiving and deleting method of the media data key of the present invention, including a content providing system 1 for encrypting and sending media data, an authorization management system 2 connected with the content providing system 1, and using For authentication and key transmission based on the information of the user card 3, the mobile terminal 4 using the user card 3 is connected to the content providing system 1 and the authorizat...

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Abstract

The invention relates to a media data key receiving and deleting method that includes media data supplying system and authorization managing system that connect to the mobile communication terminal by wireless network. The method includes the following steps: the mobile communication terminal sending key request and the information of user card to authorization managing system; the authorization managing system returning the decrypt key to the user card; the mobile communication terminal supplying the media data of each channel after encrypting, after the using time exceeding the set value, deleting the key received. The invention could save request time and decrease the channel switching time.

Description

technical field [0001] The invention relates to a method for receiving and deleting media data keys, in particular to a method in which a mobile communication terminal receives a plurality of media data keys at a time and deletes them all when any key is not used for a time exceeding a threshold value. Background technique [0002] With the continuous development of mobile communication technology and digital TV technology, a technology that combines mobile communication technology and digital TV technology - mobile phone TV technology has emerged, and it has gradually entered the practical stage in recent years. [0003] One of the most critical issues in mobile TV technology is how to realize user authentication and media data protection, that is, how to prevent illegal users from accessing broadcast TV content. The method currently adopted is generally to encrypt the media data on the network side, send the key for playing the media data to the mobile communication termin...

Claims

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Application Information

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IPC IPC(8): H04L9/00H04L9/32H04L29/06
Inventor 唐剑峰常嘉岳吕志虎吴滨
Owner CHINA MOBILE COMM GRP CO LTD
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