Electrical computers and digital processing systems: support – Data processing protection using cryptography
Reexamination Certificate
2003-11-03
2008-12-09
Armouche, Hadi (Department: 2432)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
C726S026000, C705S051000
Reexamination Certificate
active
07464273
ABSTRACT:
The content utilizing method includes the steps of encrypting the encrypted requested content with a predetermined encrypting key and transmitted to a content processing apparatus, generating and transmitting license control information including usage right information having identification information, and condition of use of the selected content and user specific information together with a decrypting key corresponding to the encrypting key to a usage right control server controlling the usage right of the content. If the utilizing authorization of the content is verified, the usage right information and the decrypting key are transmitted from the authorizing server to the content processing apparatus, and the content is decrypted by the decrypting key in the content processing apparatus and the decrypted content is processed based on the usage right information. In this manner an arbitrary content distribution is enabled to protect the content by a copyright protection without requiring a special recording media.
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Armouche Hadi
Canon Kabushiki Kaisha
Cowan Liebowitz & Latman P.C.
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