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Using a flexible rights template to obtain a signed rights label (SRL) for digital content

A permission and content technology, applied in the field of signed permission labels

Inactive Publication Date: 2005-09-07
MICROSOFT TECH LICENSING LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is little to prevent a reasonably determined user from decrypting encrypted digital content, storing such digital content in an unencrypted form, and then redistributing the same content

Method used

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  • Using a flexible rights template to obtain a signed rights label (SRL) for digital content
  • Using a flexible rights template to obtain a signed rights label (SRL) for digital content
  • Using a flexible rights template to obtain a signed rights label (SRL) for digital content

Examples

Experimental program
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Embodiment Construction

[0029] Exemplary Computing Device

[0030] Figure 1 and the following discussion are intended to provide a brief general description of a suitable computing environment in which the invention may be implemented. It should be understood, however, that handheld, portable, and other computing devices of all kinds are contemplated for use with the present invention. Although a general-purpose computer is described below, this is only an example, and the invention requires only a thin client with web server interoperation and interaction. Thus, the present invention can be practiced in a networked, hosted service environment involving few or minimal client resources, such as a networked environment in which a client device merely acts as a browser or interface to the World Wide Web .

[0031]Although not required, the present invention can be implemented through an application programming interface (API), used by a developer, and / or included in web browsing software, which will ...

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PUM

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Abstract

Content is encrypted according to a content key (CK) to result in (CK(content)) and the content key (CK) is protected according to a public key for a license server (PU-RM). Rights data is retrieved from a rights template to be associated with the content, and rules for modifying the retrieved rights data are also retrieved from the retrieved rights template. The retrieved rights data from the rights template is modified according to the rules, and the rights data and the protected content key (CK)) are submitted as a rights label to the license server for signing thereby. The license server thus validates the rights label and, if valid, creates a digital signature based on a private key (PR-RM) corresponding to (PU-RM) and based at least in part on the rights data to result in a signed rights label (SRL), and returns the SRL.

Description

technical field [0001] The present invention relates to a rights management (RM) system, and more particularly to the steps performed in such an RM system to obtain a signed rights label (SRL) for a piece of digital content from a license server using a flexible rights template. Background technique [0002] Rights management and enforcement is highly desirable for digital content such as digital audio, digital video, digital text, digital data, digital multimedia, etc., to be distributed to one or more users. Digital content may be static, such as a text document, for example, or it may form a stream, such as streaming audio / video of a live event. Typical modes of distribution include tangible devices such as diskettes (floppy disks), magnetic tapes, compact discs (compact disks) (CDs), etc., and intangible media such as bulletin boards, electronic networks, the Internet, and the like. When received by a user, such user renders or "plays" the digital content with the aid o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F12/14G06F21/10G06F21/33G06F21/60G06F21/62G06Q30/00G06Q50/00G09C1/00H04L9/08H04L9/32
CPCH04L2209/80G06F21/10H04L2209/42H04L9/3247H04L2209/603H04L9/32
Inventor C·凡卡特石J·M·卡西尔L·N·安托诺夫M·A·德梅罗P·马利克S·波纳
Owner MICROSOFT TECH LICENSING LLC