| 摘要 |
PROBLEM TO BE SOLVED: To prevent software from unauthorized use by collating identification information sent back from a software provider against the identification information of a computer. SOLUTION: When providing a user with software, the software provider requests the user to input a key code and a software providing device 4 enciphers and records it on a recording medium of a software 5. On a software recording medium 5, the enciphered key code 51 and a program 52 for collating and deciding the key codes of the recording medium side and the computer main body side are recorded along with the provided (distributed) software 53. On the user's side, the computer 1 performs the collation and decision at the start of the use of the software and the use of the main body program 53 stored on the software recording medium 5 is made unauthorized, when the key code 51 on the side of the software recording medium 5 does not match the key code 21 of the computer main body 1. |
