Tuning Windowed Chi-Squared Detectors for Sensor Attacks

Characterization of Model-Based Detectors for CPS Sensor Faults/Attacks

A vector-valued model-based cumulative sum (CUSUM) procedure is proposed for identifying faulty/falsified sensor measurements. First, given the system dynamics, we derive tools for tuning the CUSUM procedure in the fault/attack free case to fulfill a desired detection performance (in terms of false alarm rate). We use the widely-used chi-squared fault/attack detection procedure as a benchmark t...

A Comparison of Stealthy Sensor Attacks on Control Systems

As more attention is paid to security in the context of control systems and as attacks occur to real control systems throughout the world, it has become clear that some of the most nefarious attacks are those that evade detection. The term stealthy has come to encompass a variety of techniques that attackers can employ to avoid detection. Here we show how the states of the system (in particular...

Rebuttal to “Sampling Race: Bypassing Timing-based Analog Active Sensor Spoofing Detection on Analog-digital Systems”

Briefly, PyCRA implicitly requires the victim sensor to select a sample rate that is higher than a threshold that depends on the non-zero physical delays present in the attacker. This threshold does not depend on the sampling rate at the attacker, and therefore there is no “race” between the two sample rates. Also, some of the key conclusions in your paper are based on using the simple detector...

Chi squared automatic interaction detector pdf

Performance Evaluation of Local Detectors in the Presence of Noise for Multi-Sensor Remote Sensing Image Matching

Automatic, efficient, accurate, and stable image matching is one of the most critical issues in remote sensing, photogrammetry, and machine vision. In recent decades, various algorithms have been proposed based on the feature-based framework, which concentrates on detecting and describing local features. Understanding the characteristics of different matching algorithms in various applications ...