INFORMATION PROCESSING DEVICE, INFORMATION PROCESSING METHOD, AND PROGRAM

摘要

It is possible to prevent an unauthorized use of a privileged command and a library function by an application process. A concept of a security gate is established. A command requesting OS to enter the security gate is arranged at a head of a library function arranged at a highly reliable memory area which cannot be easily tampered such as a ROM and a command requesting OS to leave the security gate is arranged at the end of the library function, so that the security level is modified to a higher level only when the application process is in the sate of inside the security gate, thereby temporarily executing a privileged command.