PROGRAM EXECUTION DEVICE

摘要

A program execution device capable of protecting a program against unauthorized analysis and alteration is provided. The program execution device includes an execution unit, a first protection unit, and a second protection unit. The execution unit executes a first program and a second program, and is connected with an external device that is capable of controlling the execution. The first protection unit disconnects the execution unit from the external device while the execution unit is executing the first program. The second protection unit protects the first program while the execution unit is executing the second program.

主权项

1. An information processing device comprising:
a storage operable to store a first set of program instructions including one or more program instructions for detecting a tampering for a second set of program instructions; and a controller operable to (i) read the one or more program instructions of the first set of program instructions from the storage, (ii) judge whether or not at least part of the second set of program instructions is tampered with, by executing the one or more program instructions of the first set of program instructions in a secure processing mode, so as to execute, when judging negatively, one or more program instructions of the second set of program instructions, wherein, in the secure processing mode, the controller is operable to perform processing with a high level of security so that data of the storage cannot be accessed from outside.