Information processing apparatus, information processing method and computer readable medium

An information processing method comprising:

• analyzing a measured waveform which is a waveform obtained by measuring one of a voltage value and an impedance value of a bus line;
• determining whether or not a new device is connected to the bus line, the new device being a device not included in configuration information which includes one or more devices known to be connected to the bus line, performing authentication for each of the devices connected to the bus line, and when the new device is connected to the bus line, acquiring authentication information to be used for the authentication for the new device, and performing the authentication for the new device;
• and
• determining whether or not illegitimate operation is performed on the bus line, by using the configuration information, an analysis result of the measured waveform, and an authentication result of the device.

A non-transitory computer readable medium storing an information processing program which causes a computer to execute:

• a waveform analysis process of analyzing a measured waveform which is a waveform obtained by measuring one of a voltage value and an impedance value of a bus line;
• a device authentication process of determining whether or not a new device is connected to the bus line, the new device being a device not included in configuration information which includes one or more devices known to be connected to the bus line, performing authentication for each of the devices connected to the bus line, and when the new device is connected to the bus line, acquiring authentication information to be used for the authentication for the new device, and performing the authentication for the new device;
• and
• an illegitimate operation determination process of determining whether or not illegitimate operation is performed on the bus line, by using the configuration information, an analysis result of the waveform analysis process, and an authentication result of the device authentication process.