| 摘要 |
PURPOSE:To prevent the illicit copy of a program. CONSTITUTION:For instance, the information 10 specific to a hard disk, such as the product identification codes, which are written in the disk 5 is registered as an illicit copy prevention key. A program 1-1 is installed in a licensed computer system and carried out. Under such conditions, the specific information which is previously registered is read out. Furthermore the information 10 specific to the disk 5 is read out of the disk 5. When the coincidence is confirmed between both information a licensed system is decided and the program 1-1 is carried out. If the system is not licensed, the information 10 if read out is not coincident with the registered specific information. |
