| 摘要 |
PROBLEM TO BE SOLVED: To provide a game program which can detect alteration of a game downloaded to a user's terminal. SOLUTION: An authentication code for detecting alteration is embedded in the game program downloaded from a server 10 to the terminal 20 of a user. When a win is made in a game played on the user's terminal 20, notice of the win including the authentication code is e-mailed to the server 10, which checks whether the game program has been altered. Alternatively, the game program itself is attached to the notice of the win and sent to the server 10, which compares it with the original game program to check its alteration. |
