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Method for encrypting transmission medium stream, encryption server and mobile terminal

An encryption server and streaming media server technology, applied in the MBBMS field, can solve problems such as poor user service switching experience, high terminal complexity, and prolonged encryption service switching time, so as to shorten waiting time, reduce complexity, and reduce implementation complexity Effect

Inactive Publication Date: 2011-03-30
CHINA MOBILE COMM GRP CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0007] 1) Because the broadcast network and the unicast mobile network have different streaming media encryption methods and data packet formation methods, it is necessary to maintain two sets of service protection mechanisms for broadcast and unicast, resulting in high complexity of the terminal;
[0008] 2) After the user switches from the broadcast mode to the unicast mode, the terminal needs to re-request the unicast streaming media key, which causes the switching time of the encryption service to be prolonged, and the user's service switching experience is poor

Method used

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  • Method for encrypting transmission medium stream, encryption server and mobile terminal
  • Method for encrypting transmission medium stream, encryption server and mobile terminal
  • Method for encrypting transmission medium stream, encryption server and mobile terminal

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Embodiment Construction

[0052] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, specific embodiments will be described in detail below with reference to the accompanying drawings.

[0053] figure 1 It is a flow chart of the steps of the method for encrypting and transmitting media streams provided by the embodiment of the present invention. As shown in the figure, the method includes:

[0054] Step 101, the encryption server generates a changed program key stream, uses the program key stream to encrypt the program data stream and performs RTP encapsulation to obtain the encrypted program data stream;

[0055] Step 102, the encryption server uses the service key to encrypt and RTP-encapsulate the program key stream to obtain an encrypted key stream, and the encrypted key stream is synchronized with the encrypted program data stream through time stamps;

[0056] Step 103, the encryption server sends the encrypted program data stre...

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Abstract

The invention provides a method for encrypting transmission medium stream, an encryption server and a mobile terminal. The method comprises the following steps that: 1, the encryption server generates a program key stream, encrypts a program data stream by using the program key stream and performs real-time transmission protocol (RTP) encapsulation to obtain an encrypted program data stream; 2, the encryption server encrypts and performs RTP encapsulation on the program key stream by utilizing a service key to obtain an encrypted key stream, wherein the encrypted key stream and the encrypted program data stream are synchronized through a time stamp; and 3, the encryption server sends the encrypted program data stream and the encrypted key stream to a broadcast multiplexing emitter which performs broadcast emission and a stream medium server which performs unicast transmission. The method can uniform the stream medium encryption and decryption modes in broadcast and unicast and facilitate reducing the complexity of the terminal and switching.

Description

technical field [0001] The present invention relates to MBBMS (Mobile Broadcast Business Management System, broadcast mobile TV business management system), in particular to a method for encrypting and transmitting media streams, an encryption server and a mobile terminal. Background technique [0002] The authentication and authorization of the mobile multimedia broadcasting / mobile TV service is realized by encrypting the program stream and then sending the decryption key to the user. In order to ensure the security of the key in the transmission process, the key transmitted in the network is encrypted, and the key management adopts a four-layer architecture. [0003] After the network uses the program key stream to encrypt the program stream, the encrypted program stream is distributed through the broadcast channel, and the terminal uses the decrypted program key stream to decrypt. The network broadcasts the encrypted program key stream on the broadcast network. The serv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W12/02H04N21/2347H04N21/6437H04N21/236
Inventor 李勇张慧媛
Owner CHINA MOBILE COMM GRP CO LTD
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