METHOD FOR PROTECTING POS MACHINE FROM BEING REFITTED AND BEING IMPLANT WITH TROJAN PROGRAM FOR INFORMATION STEALING

摘要

Provided is a method for protecting a POS machine from being refitted and being provided with a Trojan program for information stealing. The method comprises the steps of: firstly, monitoring the power consumption of a main power supply in real time; secondly, carrying out theoretical power consumption registration and response, including enabling the power consumption values of the main power supply under all operations of the POS machine to be written in a bottom software, and carrying out response during the operations of the POS machine; and finally, judging whether the POS machine is abnormal or not according to the comparison of the power consumption, monitored in real time, of the main power supply and the theoretical power consumption, giving an alarm if the POS machine has an abnormality twice in succession, or else, carrying out the new comparison of the power consumption, monitored in real time, of the main power supply and the theoretical power consumption. The method employs a mode of the comparison of the power consumption, monitored in real time, of the main power supply and the theoretical power consumption, so as to recognize whether there is abnormal monitoring and information stealing or not. The method can effectively prevent the POS machine from working in an abnormal state.