Hardware intrusion detection system
| DWPI Title: System for detecting presence of hardware intruder coupled to electronic device, has processing circuitry outputting indication that hardware intruder is detected in response to determining that hardware intruder is coupled to device |
| Abstract: An apparatus for intrusion detection includes processing circuitry, a switch, signal detection circuitry, and an analog-to-digital converter (“ADC”). The processing circuitry is coupled to send a challenge signal to a device when the device is coupled to the processing circuitry. The switch is coupled to be enabled and disabled by the processing circuitry. The switch is for coupling to the device to receive a response signal in response to the challenge signal sent by the processing circuitry. The signal detection circuitry is coupled to receive the response signal in via the switch, when the processing circuitry enables the switch. The ADC is coupled to take measurements of the signal detection circuitry at a first output. The processing circuitry is coupled to the ADC and configured to analyze whether an intruder is present in the device based on the measurements of the signal detection circuitry. |
| Use: System for detecting presence of a hardware intruder coupled to an electronic device. |
| Advantage: The system avoids on-going integrity checks of the device, thus reducing supply chain risk with minimal cost to a manufacturing system in an effective manner. The system resides on a manufacturer's benchtest apparatus, thus eliminating a significant cost of engineering design change-orders for the actual device in an easy manner. |
| Novelty: The system has a processing circuitry couplable to a device, which is tested. The processing circuitry sends a challenge signal to the device. A two-stage resistor-capacitor (RC) circuit (360) is couplable to the device such that the circuit receives a response signal that is generated by the device. An analog-to-digital converter (ADC) (340) coupled to the circuit, and generates response measurements by sampling a voltage of the circuit during charging of capacitors. The processing circuitry is coupled to the ADC, and determines whether a hardware intruder is coupled to the device based on the response measurements. The processing circuitry outputs an indication that the hardware intruder is detected in response to determining that the hardware intruder is coupled to the device. |
| Filed: 5/2/2019 |
| Application Number: US16401223A |
| Tech ID: SD 12380.2 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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