DATA RETRIEVAL METHOD AND SYSTEM, RETRIEVAL KEYWORD GENERATION DEVICE AND ITS COMPUTER PROGRAM

摘要

PROBLEM TO BE SOLVED: To realize a data retrieval system capable of retrieving a keyword for cipher data.

SOLUTION: A database access device 11 is provided with a retrieval keyword preparing means for preparing retrieval keyword data by enciphering keyword data by a stream cipher system. A DB retrieval/registration device 22 is provided with a retrieval means for collating data to be retrieved (cipher data 31) which have been already enciphered by the stream cipher system of a database 21 by using the retrieval keyword data.

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