to suppress an intention of an illegal action against the input related screen by a malicious operator in the information processing device in an aspect of the present invention the detection unit detects the transition of the screen which does not include the input area to the screen which includes the input area and in a case where the transition of the screen is detected by the detection unit the control unit changes the display position of the input area with respect to the display unit according to this configuration since the display position of the input area is different for each time the input area appears with respect to the display unit it is possible to improve the security in the authentication processing the information processing device in an aspect of the present invention further includes a processing unit that executes the payment settlement processing in a case where the payment settlement processing is executed by the processing unit the control unit changes the display position of the input area with respect to the display unit that is the control unit for example changes the display position of the input area with respect to the display unit to the position different from that in the previous payment settlement processing according to this configuration since the display position is different for each time when the payment settlement processing is executed it is possible to improve the security in the authentication processing in the information.