| 摘要 |
PROBLEM TO BE SOLVED: To detect software being used by illegal duplication. SOLUTION: A computer 3 requests device numbers, assigned to computers 2a to 2c of users, and ID numbers and serial numbers of software, incorporated in the devices, from the computers 2a to 2c. The computers 2a to 2c once receiving the request from a network 1 send out their device numbers and the ID numbers and serial numbers of the software. According to the received information, the computer 3 checks whether or not the software having the same ID number and serial number is used by plural computers having different device numbers. When the same software is used, it is judged that the software is used by illegal duplication. |
