DISASTER RECOVERY DEVICE, DISASTER RECOVERY PROGRAM, ITS RECORDING MEDIUM, AND DISASTER RECOVERY SYSTEM

WIPO Patent Application WO/2007/111086

A1

By performing master server data file backup on a plurality of client terminals connected to a master server by a communication network and distributed in various locations, it is possible to recover the data file when the master server has failed in a disaster. The disaster recovery device and system perform backup by storing the data file stored in the master server in client terminals in an idling state distributed in various locations, by using the distribution technique based on grid computing. When storing a data file in a client terminal, in order to maintain confidential state of the data file, the data file is encrypted and divided into fragments and further encrypted by using different encryption keys, after which the encrypted data are sent to different client terminals.

MIYAHO NORIHARU (JP)
SUZUKI SHUICHI (JP)
TAKUBO AKIO (JP)
WADA YUJI (JP)
UENO YOICHIRO (JP)
SHIBATA RYOICHI (JP)

PCT/JP2007/054234

October 04, 2007

March 06, 2007

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UNIV TOKYO DENKI (JP)
INST NAT COLLEGES TECH JAPAN (JP)
MIYAHO NORIHARU (JP)
SUZUKI SHUICHI (JP)
TAKUBO AKIO (JP)
WADA YUJI (JP)
UENO YOICHIRO (JP)
SHIBATA RYOICHI (JP)

G06F12/00; G06F21/60; G06F21/62; G06F21/80; H04L9/14

WO2004088520A1

2004-10-14

JP2005202458A	2005-07-28
JP2005209086A	2005-08-04
JP2005215735A	2005-08-11
JP2005252384A	2005-09-15

OKADA, Kenji et al. (Setoguchi Bldg.3rd fl. 12-5, Nishi-Shimbashi 2-chome,,Minato-ku, Tokyo 03, JP)

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