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Patent Searching and Data


Title:
CONFIDENTIAL INFORMATION MANAGEMENT SYSTEM, SERVER DEVICE, AND TERMINAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2005/045686
Kind Code:
A1
Abstract:
There is provided a confidential information management system capable of maintaining secrecy of data and effectively using a storage area. A server device contains first encrypted confidential data generated by encrypting confidential data by using an encryption key. Upon request from a terminal device, the server device decrypts the first encrypted confidential data by using a decryption key so as to generate confidential data. The server device further encrypts the generated confidential data by using a public key of a user so as to generate second encrypted confidential data, which is transmitted. The terminal device receives the second encrypted confidential data and decrypts the second encrypted confidential data by using a secret key of the user so as to generate confidential data.

Inventors:
Ohnishi, Yoshio
Application Number:
PCT/JP2004/016657
Publication Date:
May 19, 2005
Filing Date:
November 10, 2004
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1006, Oaza Kadoma Kadoma-shi, Osaka, 571-8501, JP)
Ohnishi, Yoshio
International Classes:
G06F12/00; G06F12/14; G06F21/62; (IPC1-7): G06F12/14; G06F12/00; H04F9/08
Foreign References:
JP2001516913A
JPH09288609A
JP2003241956A
Other References:
NAKAYAMA T. ET AL.: 'UNIX no dogubako 21 SSH' UNIX MAGAZINE vol. 18, no. 7, 01 July 2003, pages 87 - 101, XP002988161
SUZAKI S. ET AL.: 'Kigyo muke group ango system' THE INFORMATION PROCESSING SOCIETY OF JAPAN DAI 52 KAI (HEISEI 8 NEN ZENKI) ZENKOKU TAIKAI KOEN RONBUNSHU (4) 06 March 1996, pages 4-355 - 4-358, XP002988162
Attorney, Agent or Firm:
Nakajima, Shiro (6F Yodogawa 5-Bankan, 2-1 Toyosaki 3-chome, Kita-k, Osaka-shi Osaka, 531-0072, JP)
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