| 摘要 |
PROBLEM TO BE SOLVED: To detect a game machine in a game parlor, which is fraudulently altered to perform a fraudulent game by the operation of a fraudulent control board while leaving a regular control chip operated. SOLUTION: Control chips of game machines are each connected with a display means for identifiably reporting whether the game machine is in a normal state or a special game state. The control chip sends unique ID information to an authentication server, and receives a session disclosing key sent from the authentication server. The session disclosing key decodes encrypted lighting timing data. A display means is lit at a lighting pattern according to a current game state based on lighting timing data for a normal state or for a special game state, which is included in the decoded lighting timing data. Even if a special game is performed by the fraudulent control board, the control chip determines the game as a normal game state, and the display means is lit at a lighting timing for a normal game state. COPYRIGHT: (C)2008,JPO&INPIT
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