Information security – Prevention of unauthorized use of data including prevention...
Reexamination Certificate
2003-01-30
2008-08-12
Barron, Jr., Gilberto (Department: 2132)
Information security
Prevention of unauthorized use of data including prevention...
Reexamination Certificate
active
07412725
ABSTRACT:
A copyright protection system includes a digital information processing apparatus for processing digital information of a work and a copyright managing server for managing the copyright of the digital information. The digital information processing apparatus includes an encrypted information receiving device for receiving the digital information encrypted using the first encrypting function; an encrypting device for encrypting the digital information using the second encrypting function; and a decrypting information transmitting device for transmitting decrypting information to the digital information processing apparatus. The copyright managing server includes decrypting a function transmitting device for transmitting a decrypting function to decrypt the encrypted information encrypted by the first encrypting function and the second encrypting function in response to the information transmitted by the decrypting information transmitting device.
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“Basic of encryption theory (Angouriron No Kiso)”, published by Kyouritu Shuppan Kabushiki Kaisha, Nov. 1, 1996, p. 14-19.
Barron Jr. Gilberto
Fuji Electric Device Technology Co. Ltd.
Kanesaka Manabu
Sandoval Kristin D
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