System, method, and service for delivering multimedia content by means of a permission to decrypt titles on a physical media
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United States of America Patent
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Feb 21, 2012
Grant Date -
Jun 15, 2006
app pub date -
Dec 10, 2004
filing date -
Dec 10, 2004
priority date (Note) -
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status (Latency Note)
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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.
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