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:
Mar. 03, 2009
Filed:
Feb. 09, 2004
Deirdre Michelle Joy Athaide, Mississauga, CA;
Kevin Thomas Driver, Austin, TX (US);
Lara M. Lewis, San Jose, CA (US);
Jeffrey Bruce Lotspiech, Henderson, NV (US);
Florian Pestoni, Mountain View, CA (US);
Savitha Srinivasan, San Jose, CA (US);
Vladimir Zbarsky, Newark, CA (US);
Deirdre Michelle Joy Athaide, Mississauga, CA;
Kevin Thomas Driver, Austin, TX (US);
Lara M. Lewis, San Jose, CA (US);
Jeffrey Bruce Lotspiech, Henderson, NV (US);
Florian Pestoni, Mountain View, CA (US);
Savitha Srinivasan, San Jose, CA (US);
Vladimir Zbarsky, Newark, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A title key protection system includes a title key with recordable media content; storage in a repository is not required. The title key is decrypted when needed by a clearinghouse, and then re-encrypted. The title key confers rights from the content owners to the user to play and copy the content for personal use. A user downloads encrypted content from a content repository. The user's media recording device extracts an encrypted title key from the content and obtains a media key block and media ID from the physical media on which the content will be recorded. The encrypted title key, media key block, and media ID are transmitted to a clearinghouse. The clearinghouse decrypts the title key and derives a media unique key from the media key block and media ID. The clearinghouse re-encrypts the title key with the media unique key and returns this re-encrypted title key to the media recording device for recording with the content on the physical media.