The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 2012
Filed:
Dec. 10, 2004
Bradley Collar, Valencia, CA (US);
Jeffrey Bruce Lotspiech, Henderson, NV (US);
Florian Pestoni, Mountain View, CA (US);
Michael Ripley, Hillsboro, OR (US);
Spencer Stephens, Toluca Lake, CA (US);
Bradley Collar, Valencia, CA (US);
Jeffrey Bruce Lotspiech, Henderson, NV (US);
Florian Pestoni, Mountain View, CA (US);
Michael Ripley, Hillsboro, OR (US);
Spencer Stephens, Toluca Lake, CA (US);
International Business Machines Corporation, Armonk, NY (US);
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.