Use of electromagnetic signature to determine the type of integrated circuit

A system comprising:

• a cavity resonator;
• at least one computing device;
• and
• a non-transitory computer-readable medium storing computer-executable instructions that when executed by the at least one computing device causes the at least one computing device to:
• generate a first signature of a first integrated circuit using the cavity resonator by:
• placing the first integrated circuit in the cavity resonator at a first predetermined position;
• providing an electromagnetic wave through the cavity resonator;
• while the first integrated circuit is in the first predetermined position, measuring a first resonate frequency in the cavity resonator;
• and
• generating the first signature based on the measured first resonate frequency;
• generate a second signature of a second integrated circuit using the cavity resonator;
• compare the first signature with the second signature;
• and
• determine that the second integrated circuit is an anomalous integrated circuit based on the comparison.