A digital multimedia file download or program on demand authorization method

A technology for multimedia files and media files, applied in electrical components, user identity/authority verification, transmission systems, etc., to achieve reliable security protection and simple implementation

Inactive Publication Date: 2011-12-14
中电科网络安全科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a digital multimedia file download or program-on-demand authorization method, aiming to solve the problem that the prior art lacks a complete, independent, and simple-to-implement security protection framework for on-demand / downloaded multimedia files

Method used

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  • A digital multimedia file download or program on demand authorization method
  • A digital multimedia file download or program on demand authorization method

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Embodiment Construction

[0027] In order to make the object, 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 embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] figure 1 The implementation sequence of the digital multimedia file download or on-demand authorization method provided by the embodiment of the present invention is shown, and the details are as follows:

[0029] 1. The user applies to open multimedia non-real-time services (on-demand and / or download multimedia).

[0030] 2. The multimedia server distributes identity certificates to users who have successfully applied in an offline manner, and the certificates include the user's terminal identity key (TIK) information, server's system identity key (SIK) information, and other related contr...

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Abstract

The present invention is applicable to the field of digital multimedia non-real-time transmission, and provides a digital multimedia file download or program on-demand authorization method, which uses identity keys (including system identity keys SIK and terminal identity keys TIK), user authorization keys Key (including personal key PK / group key GK) and content encryption key (CEK) three-layer key system, all keys are authorized and distributed in a layer-by-layer protection mode, and a symmetric and asymmetric hybrid cryptographic system is used , can provide complete and reliable security protection for on-demand or downloaded media, and this set of methods is applicable to various multimedia on-demand or download applications, and is not limited by the application environment and application protocol, and is very simple to implement.

Description

technical field [0001] The invention belongs to the field of digital multimedia non-real-time transmission, and in particular relates to a digital multimedia file download or program on-demand authorization method. Background technique [0002] With the digitalization of program production, program transmission, and program storage, the security of program content has always been a concern of content providers. Especially in the broadcasting of high-definition digital programs, the problem of content security is more prominent. Only by protecting the security of program content can the legitimate interests of content providers be safeguarded and the enthusiasm of content producers be enhanced. [0003] Existing multimedia file protection technologies are all aimed at a certain application, closely integrated with the application environment and application protocol, lack a complete and independent security framework, and are relatively complicated to implement. Contents o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L9/32
Inventor 肖红跃王孙谷周明权
Owner 中电科网络安全科技股份有限公司
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