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1. (WO2018124105) ACCESS MANAGEMENT SYSTEM, ACCESS MANAGEMENT METHOD, AND PROGRAM

Pub. No.:    WO/2018/124105    International Application No.:    PCT/JP2017/046732
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Wed Dec 27 00:59:59 CET 2017
IPC: H04L 9/08
G06F 21/62
G09C 1/00
Applicants: ZENMUTECH, INC
株式会社ZenmuTech
Inventors: KUNII, Atsushi
國井 淳
TOMOMURA, Kiyoshi
友村 清
Title: ACCESS MANAGEMENT SYSTEM, ACCESS MANAGEMENT METHOD, AND PROGRAM
Abstract:
[Problem] To maintain or improve convenience for a user while enhancing security in an access management configuration. [Solution] Provided is an access management system for managing access to data handled on a shared server. Data in a registered folder on the shared server are concealed by conversion using an access key. A database of the system stores identification information of n distributed keys generated by distributing the access key using a threshold distribution method, in association with a data path of a folder allocated to a first user. Some of the distributed keys are held in the system as system distributed keys, and at least one of the remaining distributed keys is provided to the first user as a user distributed key. If an access request is received from the first user together with a first user distributed key, target data to be restored using the access key to be restored on the basis of a number of the distributed keys satisfying a quorum are expanded to the registered folder. Also provided are a corresponding method and computer program.