ELECTRONIC BUSINESS TRANSACTION SYSTEM UNAUTHORIZED UTILIZATION DETECTION METHOD AND DEVICE

摘要

PROBLEM TO BE SOLVED: To provide electronic business transaction system unauthorized utilization detection method and device capable of detecting the unauthorized utilization of a system by an unauthorized user and an unauthorized client based on the result of monitoring the normal action of a normal user and a normal client. SOLUTION: This device is provided with a judgement reference supply means 6 for supplying plural data incorporated in an individual model and a general model stored by a data storage means 2 as a judgement standard for judging whether or not the access is by the unauthorized utilization every time new access is executed and an unauthorized utilization judgement means 7 for comparing the plural data incorporated in the individual model and the general model supplied by the judgement standard supply means 6 with new plural data extracted by an access data extraction means 1 accompanying the access and judging whether or not the access is by the unauthorized utilization.