Patent ID: 8910242
Filing Date: 2014-12-09
Classification: G06F

Abstract:
1. A method of validating/invalidating an additional function unit in an information processing apparatus to which the additional function unit is added, the method comprising: a step of calculating a first one-way function value based on data included in a recording medium that stores a boot loader and an operating system, and storing the first one-way function value in the additional function unit upon manufacturing; a step of calculating a second one-way function value based on the data included in the recording medium after the information processing apparatus is activated; and a step of, when the first one-way function value and the second one-way function value are different, invalidating a function of the additional function unit, wherein the recording medium is provided in the information processing apparatus, the additional function unit is a unit that is added to the information processing apparatus, the information processing apparatus is a payment function mounted handy terminal, and the additional function unit is a PIN (Personal Identification Number) input unit.