| 摘要 |
Abstract An authentication method for a gaming machine, comprising: starting the gaming machine; performing an initial s authentication of program code comprising at least a first category and a second category during start up of the gaming machine, the first category of program code being program code that is expected to be modified more frequently than the second category of program code, the 10 first and second categories of program code being stored in logically separate storage areas, the initial authentication being performed by authenticating the storage areas in which the first and second categories of program code are stored, the initial authentication is comprising calculating at least one cumulative hash, and verifying the at least one cumulative hash against a digitally signed cumulative hash using a master public key; receiving modifying program code; determining which category the modifying program code belongs to and storing 20 the modifying program code in the storage area corresponding to the category; and authenticating the storage area in which the modifying program code is stored prior to executing the modifying program code. 2775115_1 (GHMatters) P71108.AU.3 15/08/11 04' 00 0O g< w z |
