Invention Grant
US08121952B2 System, method, and service for delivering multimedia content by means of a permission to decrypt titles on a physical media
有权
用于通过对物理介质上的标题进行解密的许可来传送多媒体内容的系统,方法和服务
- Patent Title: System, method, and service for delivering multimedia content by means of a permission to decrypt titles on a physical media
- Patent Title (中): 用于通过对物理介质上的标题进行解密的许可来传送多媒体内容的系统,方法和服务
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Application No.: US11009272Application Date: 2004-12-10
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Publication No.: US08121952B2Publication Date: 2012-02-21
- Inventor: Bradley Collar , Jeffrey Bruce Lotspiech , Florian Pestoni , Michael Ripley , Spencer Stephens
- Applicant: Bradley Collar , Jeffrey Bruce Lotspiech , Florian Pestoni , Michael Ripley , Spencer Stephens
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Fleit Gibbons Gutman Bongini & Bianco PL
- Agent Jon A. Gibbons
- Main IPC: G06F21/00
- IPC: G06F21/00 ; H04L9/00 ; H04N7/167

Abstract:
Enhanced multimedia content on physical media interacts with the user through a media player and the Internet. Enhanced multimedia utilizes IDs for pieces of content on the media and a media key block. On the enhanced media is a file with a list of URLs. As the enhanced media plays a title requiring an external permission for decryption, the media player accesses the URL for that title and obtains the permission. The permission may be purchased or provided for free. Secure encryption and transmission of permission is accomplished by broadcast encryption using a media key block. Each media has a unique set of keys that allow the media player to process the media key block; however, each media follows a unique path through the media key block. All legitimate media players obtain the media key; circumvention devices cannot decipher the media key block.
Public/Granted literature
Information query