| 摘要 |
PROBLEM TO BE SOLVED: To make a correspondence between a communication key of a main board and a communication key of a sub board a condition of a presentation control, and to provide a game machine with a high security level by configuring the communication keys to be updatable.SOLUTION: A main board 10 has a first communication key to be used in an encryption communication with a sub board 11, and the sub board 11 has a second communication key to be used in an encryption communication with the main board 10. If the second communication key is a key corresponding to the first communication key, it is configured such that an information transfer from the main board 10 to the sub board 11 is possible, and the first communication key and the second communication key are configured to be updatable by a prescribed trigger.SELECTED DRAWING: Figure 2 |
