| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem of security vulnerability at key leakage.SOLUTION: A device for a game performs mutual authentication between a CU (Card Unit) control unit 323 and a security chip (SC) 325b and between the security chip (SC) 325b and a communication control IC 325a. When the mutual authentication is successful, the device generates a communication key on the basis of random numbers and data of current time, and performs encryption communication of business telegrams for a game machine by using the communication key. |
