Method and system for safely transmitting media stream

A technology for secure transmission and media streams, applied in the field of media stream encryption, can solve problems such as inability to obtain keys and legal monitoring, and achieve the effect of reducing complexity

Inactive Publication Date: 2008-07-16
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, only the terminals participating in the interaction can obtain the key. The terminals participating in the interaction mentioned here may be two terminals, the calling terminal and the called terminal, or multiple terminals. Any third party other than the interaction cannot obtain the key, that is, cannot meet the requirements of legal interception

Method used

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  • Method and system for safely transmitting media stream
  • Method and system for safely transmitting media stream
  • Method and system for safely transmitting media stream

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Embodiment Construction

[0047] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0048] The basic idea of ​​the present invention is: a key generation unit is set in advance, which is responsible for the generation and distribution of keys; terminals and media stream bearing devices use the keys obtained from the key generation unit to transmit media streams, so as to achieve the purpose of securely transmitting media streams .

[0049] figure 1 is a flowchart of the present invention. Such as figure 1 Shown, the present invention comprises the following steps:

[0050]Step 101: The key generation unit acquires encryption capability information of the terminal during a call flow, and generates a key for media streams according to the encryption capability information.

[0051] Step 102: The key generating unit sen...

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PUM

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Abstract

The invention provides a method of safely transporting media stream and a system, wherein, the method includes the following steps: presetting a key generating unit which acquires encryption capability information of a terminal during a call flow, and generating keys of media stream according to the encryption capability information; transmitting the generated keys to the terminal and media stream carrying equipment respectively; transmitting the media stream through the terminal and the media stream carrying equipment by using the acquired keys. In the proposal of the invention, the keys are not generated by a call terminal self or a called terminal self, but is generated by the key generating unit without clock synchronization or supporting of a PKI system, thereby greatly reducing complexity of a terminal-to-terminal media stream key agreement, facilitating popularization of media stream encryption service, and meeting practical requirements of legal monitoring.

Description

technical field [0001] The invention relates to media stream encryption technology, in particular to a method and system for safely transmitting media streams. Background technique [0002] Media streams are generally transmitted based on Real-time Transport Protocol (RTP, Real-time Transport Protocol), and the media streams mentioned here are audio media streams, video media streams, and the like. However, since the RTP protocol itself does not involve security issues, there are security risks such as leaks and attacks during the transmission of media streams. [0003] In order to enhance the security of media streams during transmission, various methods for generating and distributing keys, ie, key agreement methods, have been proposed. Afterwards, the terminal can use the assigned key to transmit the media stream, so as to achieve the purpose of securely transmitting the media stream. [0004] In the prior art, there are two typical key agreement methods: one is the Mul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/167H04L9/28H04L29/06
CPCH04L63/0457H04L9/065H04L9/0861H04L63/06
Inventor 孙恺孔涛高江海黎静
Owner HUAWEI TECH CO LTD
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