Probability, random processes, and estimation theory for engineers
Probability, random processes, and estimation theory for engineers
An introduction to signal detection and estimation (2nd ed.)
An introduction to signal detection and estimation (2nd ed.)
A method for obtaining digital signatures and public-key cryptosystems
Communications of the ACM
Foundations of Cryptography: Basic Tools
Foundations of Cryptography: Basic Tools
The Design of Rijndael
Access Control Systems: Security, Identity Management and Trust Models
Access Control Systems: Security, Identity Management and Trust Models
Digital Watermarking and Steganography
Digital Watermarking and Steganography
Guaranteed Active Failure Detection and Isolation for Linear Dynamical Systems
Automatica (Journal of IFAC)
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In this paper, we propose a method to detect an unauthorized control signal being sent to a remote-controlled system (deemed an "intrusion fault" or "intrusion") despite attempts to conceal the intrusion. We propose adding a random perturbation to the control signal and using signal detection techniques to determine the presence of that signal in observations of the system. Detection of these perturbations indicates that an authorized or "trusted" operator is in control of the system. We analyze a worst case scenario (in terms of detection of the intrusion), discuss construction of signal detectors, and demonstrate our method through a simple example of a point robot with dynamics.