| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a hardly alterable game machine with higher reliability. <P>SOLUTION: Authentication of a game data set is carried out within the game machine using an authentication program stored in an unalterable ROM physically located within the game machine. The authentication program stored in the unalterable ROM performs an authentication check on the casino game data set at appropriate times prior to commencement of game play, such as at periodic intervals or at request (on demand). At appropriate occasions, the content of the unalterable ROM can be verified by computing the message digest of the unalterable ROM content and comparing this computed message digest with a securely stored copy of the message digest computed from the ROM content prior to installation in the casino game machine. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
