Inventors:
Deirdre Athaide - Mississauga, CA
Kevin Driver - Austin TX, US
Lara Lewis - San Jose CA, US
Jeffrey Lotspiech - Henderson NV, US
Florian Pestoni - Mountain View CA, US
Savitha Srinivasan - San Jose CA, US
Vladimir Zbarsky - Newark CA, US
Assignee:
International Business Machines Corporation - Armonk NY
International Classification:
H04L009/32
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.