Digital rights management license delivery system and method
First Claim
1. A system for digital rights management comprising:
- a client computer having software for receiving and playing encrypted media content, said client computer further having software for transmitting a request to a server to obtain said encrypted media content;
a host computer system, said host computer system including a server having software for mapping a plurality of unique unencrypted logical addresses to a single logical address, said single logical address pointing to a unit of encrypted media, said host computer system further having software for determining the number of times delivery of said unit of encrypted media is requested from each of said plurality of unique logical addresses and for determining whether the number of requests for said unit of encrypted media from each of said plurality of unique logical addresses exceeds a predetermined license delivery event limit and, if the number of requests for said unit of encrypted media from one of said plurality of unique logical addresses does not exceed said predetermined license delivery event limit, authorizing the transmittal of a digital rights management license to decrypt said unit of encrypted media to said client computer.
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0 Petitions
Accused Products
Abstract
A system for Digital Rights Management (DRM) license delivery is presented in which the license and encrypted content is accessed from a unique download URL address for each unit of encrypted content for each subscriber. The license is delivered only a limited number of times from each URL (typically once, but optionally more than once) and is delivered to the client system that first accesses the URL (or if more than one license delivery is authorized by the content owner or distributor) to the same or different client system that accesses the URL up to the maximum number of license delivery events authorized.. When the subscriber is ready to view the content, the subscriber clicks on the download URL to cause the browser for the subscriber client system to request the web page located at the unique URL location. In response to the request, the host system delivers a license and the encrypted content to the subscriber client system that accessed the URL. If the unique download URL is accessed subsequent times, the host system delivers the encrypted content, but does not re-deliver the license. Since the subscriber client system has already stored the license, if the subscriber client system re-accesses the site, it will be able to download and play the media content for so long as the terms of the license permit. However, if another client system accesses the unique URL address, for example if the subscriber e-mails the URL address to another user, the content can be downloaded but will not be played by the subsequent client system because the license is not re-delivered.
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Citations
13 Claims
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1. A system for digital rights management comprising:
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a client computer having software for receiving and playing encrypted media content, said client computer further having software for transmitting a request to a server to obtain said encrypted media content; a host computer system, said host computer system including a server having software for mapping a plurality of unique unencrypted logical addresses to a single logical address, said single logical address pointing to a unit of encrypted media, said host computer system further having software for determining the number of times delivery of said unit of encrypted media is requested from each of said plurality of unique logical addresses and for determining whether the number of requests for said unit of encrypted media from each of said plurality of unique logical addresses exceeds a predetermined license delivery event limit and, if the number of requests for said unit of encrypted media from one of said plurality of unique logical addresses does not exceed said predetermined license delivery event limit, authorizing the transmittal of a digital rights management license to decrypt said unit of encrypted media to said client computer. - View Dependent Claims (2, 3)
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4. A method of providing encrypted media and licenses to decrypt said encrypted media to a plurality of users, comprising the steps of:
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providing a unit of encrypted media content to a host computer, said unit of encrypted media content being encrypted with an encryption key; mapping said unit of encrypted media to a plurality of unique logical addresses; providing one of said plurality of unique logical addresses to a client computer; transmitting a first request from said client computer to retrieve said unit of encrypted media from said one of said plurality of unique logical addresses; in response to said first request for said unit of encrypted media, transmitting said encrypted media content to said client computer; and in response to said first request to retrieve said unit of encrypted media, determining whether the number of licenses transmitted to decrypt said unit of encrypted media content from said one of said plurality of unique logical addresses exceeds a predetermined license delivery event limit and, if the number of licenses transmitted to decrypt said media content associated with said one of said plurality of unique logical address does not exceed said predetermined license delivery event limit, transmitting a license to decrypt said encrypted media content to said client computer. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification