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Encrypting and de-encrypting method for medium flow

An encryption method and technology for media streams, applied in the field of encrypted transmission and decryption of media streams, can solve problems such as media stream cracking and security risks, and achieve the effect of improving security and ensuring processing efficiency.

Inactive Publication Date: 2011-01-19
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if part of the media content is cracked due to accidental reasons, if only the above-mentioned double-layer encryption anti-copy method is used, the entire media stream will be cracked
And the above-mentioned variable key media stream encryption method, because the key is variable, although it is more likely to avoid the above situation, but because the data packet label item as a part of the key material is transmitted with the media stream in the form of plain text, security aspects still face certain risks

Method used

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  • Encrypting and de-encrypting method for medium flow
  • Encrypting and de-encrypting method for medium flow
  • Encrypting and de-encrypting method for medium flow

Examples

Experimental program
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specific Embodiment

[0045] like image 3 Shown, in the Internet TV (IPTV) field that adopts Digital Rights Management (DRM) technology, a kind of specific embodiment of the present invention is as follows:

[0046] When a channel in the IPTV system needs to be protected by digital rights management technology, the operation support system 309 will send a channel encryption request 311 to the media stream encryption center 306 . To simplify key management, in this embodiment, the media stream encryption center 306 unifies the wrapping key and the basic key into one static key. After receiving the channel encryption request 311, the media stream encryption center 306 pregenerates a static key, and sends a key registration query request 312 to the key management center 307, and the key management center 307 first inquires whether the channel already has a static key. key, if there is a static key, return the query result in the key registration query response 313; otherwise, register the pre-genera...

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PUM

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Abstract

This invention relates to a ciphering and deciphering method of media flows, in which, the ciphering method includes: a media flow sending party sets up a basic cryptographic key, a package cryptographic key and a dynamic cryptographic key to generate a data ciphered key and cipher the sent media flow to generate ciphered media flow, utilizing the package key to cipher the dynamic key and insert it in the ciphered media flow. The deciphering method includes: the media flow receiving party receives the basic key and the package key from the media flow transmission party and strips off the ciphered dynamic key from the media flow and utilizes the received package key to decipher the ciphered dynamic key to get the dynamic key to generate data ciphered key and utilizes the generated data ciphered key to decipher the received ciphered media flow.

Description

technical field [0001] The invention relates to the technical field of network communication security, in particular to methods for encrypted transmission and decryption of media streams. Background technique [0002] With the increase of wired and wireless network bandwidth and continuous improvement of access conditions, streaming media applications represented by audio and video playback are becoming more and more widespread. In order to protect the rights and interests of intellectual property owners, issues such as the secure transmission of media streams in streaming media applications, and even the control of usage rights related to secure transmission have gradually become one of the focuses. [0003] At present, the standards, protocols and specifications of the major audio and video stream transmission are mostly involved in this aspect. For example, the ISO13818 "Information Technology - Universal Coding of Motion Picture and Its Accompanied Audio Signal" series ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/24H04L29/06H04L12/56H04L9/00
Inventor 许军宁华国栋何康吕吉梁广德
Owner ZTE CORP
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