Information processing apparatus capable of detecting software tampering and control method therefor

Abstract

An information processing apparatus includes a verification unit that performs verification of software to be executed by an execution unit, a retaining unit that retains information indicating a voltage supposed to be applied to the execution unit, a power supply unit that applies a predetermined voltage to the execution unit on the basis of the information, and a clock signal output unit that outputs clock signals having frequencies, and the clock signal output unit outputs a clock signal having a first frequency to the verification unit when verification of the software is performed, outputs a clock signal having a second frequency lower than the first frequency to the execution unit before the predetermined voltage is applied to the execution unit, and outputs a clock signal having a third frequency higher than the second frequency to the execution unit after the predetermined voltage is applied to the execution unit.

Dependencies are inferred from the claim text.