UNAUTHORIZED USE PREVENTION SYSTEM

PROBLEM TO BE SOLVED: To provide an unauthorized use prevention system capable of appropriately limiting a plurality of pieces of software by using a key module and preventing space for connecting a key module from being large in accordance with the number of pieces of software to be used at the same time. SOLUTION: An information processor has a key information storing means, a control part, an illicitness prevention control part and a port part, and the illicitness prevention control part has a connection recognizing means and a key information copying means. The illicitness prevention control part makes the key information storing means copy key information 32 of the key module 15 (S104) when recognizing that the key module 15 is connected to the port part (S101), and the control part makes all pieces of software 28 having identification information corresponding to the key information 32 stored in the key information storing means various executable states (S105). COPYRIGHT: (C)2008,JPO&INPIT