PERSONAL INFORMATION MANAGEMENT DEVICE, DISTRIBUTED KEY STORAGE DEVICE, AND PERSONAL INFORMATION MANAGEMENT SYSTEM

Title:

PERSONAL INFORMATION MANAGEMENT DEVICE, DISTRIBUTED KEY STORAGE DEVICE, AND PERSONAL INFORMATION MANAGEMENT SYSTEM

Document Type and Number:

WIPO Patent Application WO/2005/104430

Kind Code:

A1

Abstract:

There is provided a personal information management device capable of eliminating trouble of a password input and erase of the personal information by a user, preventing read of the personal information by a person other than the user, and keeping concealment of the personal information even if a mobile device is lost. The mobile device (20) includes: a personal information storage unit (201) for holding encrypted personal information; a key distribution unit (204) for generating a first and a second distributed key according to a secret distribution method by using a decryption key of the encrypted personal information; a distributed key storage unit (205) stores the second distributed key, causes a home device (30) to store the first distributed key via a transmission/reception unit (206) and erases the decryption key. Upon decryption, a link check unit (210) checks the link with the home device (30). When the link is confirmed, a key restoration unit (207) acquires the first distributed key from the home device (30) via the transmission/reception unit (206) and generates the decrypted key from the first and the second distributed key. A decryption unit (208) decrypts the encrypted personal information by using the decryption key.

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Inventors:

MATSUZAKI NATSUME
YOKOTA KAORU
NONAKA MASAO
INOUE MITSUHIRO
NAKAHARA TOHRU
HIGASHI AKIO

Application Number:

PCT/JP2005/007695

Publication Date:

November 03, 2005

Filing Date:

April 22, 2005

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
MATSUZAKI NATSUME
YOKOTA KAORU
NONAKA MASAO
INOUE MITSUHIRO
NAKAHARA TOHRU
HIGASHI AKIO

International Classes:

G06F12/14; G06F21/60; G06F21/62; G06K19/07; G06K19/077; G06K19/10; H04L9/08; (IPC1-7): H04L9/08; G06F12/14; G06K19/07; G06K19/10

Foreign References:

JP2002351845A	2002-12-06
JP2002260070A	2002-09-13
JP2002091301A	2002-03-27

Attorney, Agent or Firm:

Nakajima, Shiro (2-1 Toyosaki 3-chome, Kita-k, Osaka-shi Osaka, JP)

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