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:
Aug. 12, 2008
Filed:
Jan. 30, 2003
Teruhisa Yokosawa, Nagano, JP;
Teruhisa Yokosawa, Nagano, JP;
Fuji Electric Device Technology Co., Ltd., Tokyo, JP;
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.