Visible to the public NoisePrint: Attack Detection Using Sensor and Process Noise Fingerprint in Cyber Physical Systems

TitleNoisePrint: Attack Detection Using Sensor and Process Noise Fingerprint in Cyber Physical Systems
Publication TypeConference Paper
Year of Publication2018
AuthorsAhmed, Chuadhry Mujeeb, Ochoa, Martin, Zhou, Jianying, Mathur, Aditya P., Qadeer, Rizwan, Murguia, Carlos, Ruths, Justin
Conference NameProceedings of the 2018 on Asia Conference on Computer and Communications Security
Conference LocationNew York, NY, USA
ISBN Number978-1-4503-5576-6
Keywordsactuator security, composability, CPS/ICS Security, cyber physical systems, Device Fingerprinting, Human Behavior, Internet of Things (IoT), IoT security, man-in-the-middle, Metrics, physical attacks, pubcrawl, Resiliency, security, sensor security, sensor spoofing, Sensors and Actuators

An attack detection scheme is proposed to detect data integrity attacks on sensors in Cyber-Physical Systems (CPSs). A combined fingerprint for sensor and process noise is created during the normal operation of the system. Under sensor spoofing attack, noise pattern deviates from the fingerprinted pattern enabling the proposed scheme to detect attacks. To extract the noise (difference between expected and observed value) a representative model of the system is derived. A Kalman filter is used for the purpose of state estimation. By subtracting the state estimates from the real system states, a residual vector is obtained. It is shown that in steady state the residual vector is a function of process and sensor noise. A set of time domain and frequency domain features is extracted from the residual vector. Feature set is provided to a machine learning algorithm to identify the sensor and process. Experiments are performed on two testbeds, a real-world water treatment (SWaT) facility and a water distribution (WADI) testbed. A class of zero-alarm attacks, designed for statistical detectors on SWaT are detected by the proposed scheme. It is shown that a multitude of sensors can be uniquely identified with accuracy higher than 90% based on the noise fingerprint.

Citation Keyahmed_noiseprint:_2018