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Cipher key management system in digital copyright management and method therefor

A technology of key management system and processing method, which is applied in the field of digital copyright management, and can solve problems such as easy leakage, lack of flexibility, and poor CEK management

Active Publication Date: 2013-05-01
SHANGHAI AISINOCHIP ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is likely to cause problems such as poor management of CEK and easy leakage; the management of RO is also inflexible, and cannot well meet the needs of the market and customers

Method used

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  • Cipher key management system in digital copyright management and method therefor
  • Cipher key management system in digital copyright management and method therefor
  • Cipher key management system in digital copyright management and method therefor

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Embodiment Construction

[0041] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention, and all similar structures, methods and similar changes of the present invention should be included in the protection scope of the present invention.

[0042] The KMS proposed by the present invention is used to respond to the registration request of the client device, and complete the registration of the client device according to the request; respond to the generation, revocation and update request of the RO and make corresponding processing, so as to realize the flexible and effective management of the RO; In response to the CEK request, the corresponding CEK is generated and protected by encryption to ensure the safe transmission of CEK between modules in the DRM system. Its characteristics have the following four aspects: first, KMS is composed of registration subsys...

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Abstract

A key management system of DRM and a method thereof are provided, belonging to the technical field of digital copyright management, which aims to solve the technical problem of perfecting the CEK management. The key management system comprises a register subsystem, an RO processing subsystem and a CEK generation subsystem, wherein the register subsystem is used to respond to at least one registerrequest of a client terminal device, and finish the register of the client terminal device with DRM Agent, the RO processing subsystem is used to respond to RO requests, and conduct the processes of RO generation, cancellation, and updating and the like, and a key generation subsystem responds to requests from a middleware CEK to generate relative CEK and make encryption protection, and the threesubsystems are respectively communicated with other external DRM modules through communication interfaces Interface, such as a copyright issue system RDS, a middleware MWS and the like. The inventionhas the characteristics of simultaneously responding and finishing the register requests of a plurality of client terminals, effectively managing CEK, safely transmitting CEK, and flexibly managing RO.

Description

technical field [0001] The invention relates to the field of digital rights management (DRM), in particular to a method and system for key management in the DRM system. Background technique [0002] With the development of Internet technology, the transmission and sharing of information has become very convenient. However, the convenience of information sharing has brought about a big problem, that is, the copyright management of information has become extremely difficult. How to manage the copyright of information and protect the legitimate rights and interests of content issuers CI (Content Issuer) has become a major issue. DRM (Digital Right Management) was born in response to such a background. [0003] At present, the core idea of ​​DRM is the idea of ​​separating encrypted content and copyright. In the DRM system, digital information products are encrypted with the content encryption key CEK (Content Encryption Key), and the encrypted content is expressed as an encr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/08H04L29/06
Inventor 周玉洁李飞
Owner SHANGHAI AISINOCHIP ELECTRONICS TECH