DATA MANAGEMENT SYSTEM

PROBLEM TO BE SOLVED: To appropriately restrict access even when a secondary data base is disclosed. SOLUTION: The data management system is constituted by including a DB server 100 and a key management server 200. The key management server 200 is provided with: a DB use/registration request input port 206 which receives a registration request for registering a data base including data of a data base of the DB server 100 in the DB server 100 together with a use permission condition and a registration permission condition of the data base from a client terminal 300; a DB registration condition propriety judgment module 211 which judges whether or not the use permission condition and the registration permission condition meet a registration permission condition of a data base at an acquisition source; and an encryption key generation module 212 which generates and transmits an encryption key for registration for encrypting the data base for registration to the DB server 100 when the use permission condition and the registration permission condition are judged to meet the registration permission condition. COPYRIGHT: (C)2008,JPO&INPIT