COPY PROTECTION APPARATUS AND INFORMATION RECORDING MEDIUM USED IN THIS COPY PROTECTION APPARATUS
Patent №
US 6,301,663
Granted
2001-10-09
Filed 1998
Owner
KABUSHIKI KAISHA TOSHIBA
Lab
—
AI components
1
evo
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
09195918
This invention protects the unauthorized copy of multimedia data, recorded on an information recording medium, by using electronic watermark information and key information. The electronic watermark information embedded in the multimedia data is extracted by an electronic watermark extraction unit on the decryption system side. A disk key is obtained using the electronic watermark information and a part master key. The multimedia data is decrypted using the resultant disk key.
AI classification
Ownership
KABUSHIKI KAISHA TOSHIBA
assignment · 97520102
Assignors
KATO, TAKU, KATO, TAKEHISA, ENDOH, KENJIRO, YAMADA, HISASHI, ENDOH, NAOKI
On an employer assignment, the assignors are typically the inventors.