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:
May. 18, 2004
Filed:
Mar. 30, 2001
Verifying the integrity of a media key block by storing validation data in the cutting area of media
Applicant:
Inventors:
Michael S. Ripley, Hillsboro, OR (US);
Jeffrey B. Lotspiech, San Jose, CA (US);
Atsushi Ishihara, Aoba-ku, JP;
Taku Kato, Kamakura, JP;
Yoshihisa Fukushima, Osaka, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 1/214 ;
U.S. Cl.
CPC ...
G06F 1/214 ;
Abstract
A method for verifying the integrity of a media key block (MKB) by storing validation data in a validation area of a medium, such as a DVD-R or a DVD-RW. In one embodiment, validation data comprises a hash function on a media key block. In another embodiment, validation data comprises the Verification Data field of an MKB's Verify Media Key Record.