Method and apparatus for transferring field permission cryptographic key

A transfer method and domain key technology, applied in the field of digital rights management, can solve the problem of not providing a specific implementation scheme for domain RO transfer, and achieve the effects of strong practicability, improved security, and simple realization.

Active Publication Date: 2012-04-25
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] In the process of implementing the present invention, the inventor found that there is a technical requirement for transferring domain RO, but the prior art does not provide a specific implementation plan for domain RO transfer

Method used

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  • Method and apparatus for transferring field permission cryptographic key
  • Method and apparatus for transferring field permission cryptographic key
  • Method and apparatus for transferring field permission cryptographic key

Examples

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Embodiment Construction

[0057] In the embodiment of the present invention, the domain key is used to encrypt the content encryption key and the message verification key, and the encrypted ciphertext is encapsulated into the domain license, so that the encapsulation process of the domain license key can be realized, and the implementation is simple; The encryption key encrypts the content encryption key, encrypts the license encryption key, message verification key, and random number with the domain key, and encapsulates the ciphertext obtained by the two encryptions into the domain license to realize the domain license key encapsulation process and improve the security of the domain license key. After the domain license of the first domain is transferred to the device of the second domain, the device of the second domain re-encapsulates the domain license key with the domain key of this domain, realizing the transfer of the domain license between different domains.

[0058] The structure of a communi...

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Abstract

The invention discloses a transferring method of a domain license cipher key, including: a device of a second domain receiving a domain license provided by a device of a first domain and a corresponding content cipher key; the device of the second domain encrypting the content cipher key by using the domain key of the second domain, acquiring a second cipher text; and the device of the second domain encapsulating the second cipher text into the domain license. The method of the invention can realize the key encapsulation process of the domain license, ensure the security protection of the cipher key information during the license transferring process and have simple implementation and strong practicability.

Description

technical field [0001] The invention relates to the technical field of digital rights management, in particular to a domain license key transfer method and equipment. Background technique [0002] Digital Rights Management (DRM) mainly controls the use of digital content through rights restriction and content protection schemes, and protects the legitimate rights and interests of content owners. After the digital content issuer (Content Issuer, CI) encrypts the digital content, the user downloads the encrypted digital content data package to the terminal device; the copyright issuer (Rights Issuer, RI) is responsible for distributing the license corresponding to the digital content , which includes the content encryption key and corresponding permissions. The purchased digital content can only be used normally if the device has both the content data package and the license. The DRM terminal (DRM Agent) uses the public key of the device to decrypt to obtain the license encr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/32H04L1/00H04L29/06H04L12/56
Inventor 周志鹏党沛周皓隽陈大港冯雯洁黄晨张仁宙
Owner HUAWEI TECH CO LTD
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