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Digital license sharing system and method

A technology for digital and digital content, applied in the field of sharing a single digital license, which can solve problems such as non-disclosure

Inactive Publication Date: 2007-07-18
SMART INTERNET TECHNOLOGY CRC PTY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no disclosure of a method that provides secure, efficient and flexible transfer permissions independent of the encrypted content, so that the content may be kept in untrusted storage, for example on multiple devices owned by a single consumer. Multiple copies, while only allowing a single device to hold a license authorizing playback of content with that device

Method used

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  • Digital license sharing system and method
  • Digital license sharing system and method
  • Digital license sharing system and method

Examples

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Embodiment Construction

[0101] Fig. 1 is a schematic diagram of a digital rights management system 100 according to a preferred embodiment of the present invention. The system comprises two trusted playback devices 102,103, each comprising a digital repository 104,105, a license database 106,107 and a secure hardware counter 108,109. Each playback device 102, 103 may be, for example, a portable music player, a digital video player, or a general purpose personal computer equipped with software and hardware enabling it to be used to reproduce or display digital content.

[0102] Each license database 106, 107 is a conceptual database on the respective device, such as a file directory, that stores all licenses in protected form, and further includes a transaction tracking file for maintaining a record of the transaction tokens of these licenses. Each digital repository 104, 105 is a digital content repository on a user device that stores digital items in a protected form. In order to decrypt and use th...

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PUM

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Abstract

A digital license sharing method, system and apparatus is provided for use in a digital rights management system. Usage rights in respect of digital content are transferred between content player devices or applications by associating with each player a status indication. Transfer is carried out by transmitting a request to obtain the usage rights from a player requiring usage rights to a player currently holding the rights. The transferring player sets a first status indication to indicate that it is no longer entitled to exercise the rights, and transmits a response to the requesting player to transfer the usage rights. The requesting player then sets a second status indication to indicate that it is henceforth entitled to exercise the rights. Methods and apparatus for creating transferable licenses are also provided that employ a sharable license format including a validated portion and an unvalidated portion. The validated portion, for example, includes characteristic information of a digital content decryption key. The unvalidated portion includes the digital content key itself encrypted.

Description

technical field [0001] The present invention relates to digital rights management, and more particularly to systems and methods for sharing a single digital license among multiple devices. Background technique [0002] Today, many service providers sell their digital content, such as digital music, images, videos, books and games, over computer networks. To protect commercial digital intellectual property and avoid digital piracy, digital rights management (DRM) systems are required, which can be used to prevent unauthorized access to digital content and manage content usage rights. The core idea in DRM is the use of digital licenses. A license is a digital data file that contains content decryption keys and content usage rules. [0003] In DRM, instead of purchasing content directly, a user purchases a license granting specific rights to the content. Usage rules dictate how the content can be used, such as permission to copy, pay per view, one week's rental, etc. Licens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/00G06F13/00G06F21/00G06Q10/00H04L29/06H04N21/237H04N21/24H04N21/258H04N21/835
CPCH04L2463/101G06F21/10H04L63/0442G06F2221/0706G06Q10/10G06F21/105G06F21/1012
Inventor 刘琼赖哈尼·萨法维-奈尼尼古拉斯·P·谢泼德
Owner SMART INTERNET TECHNOLOGY CRC PTY LTD
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