Identification of Sensor Replay Attacks and Physical Faults for Cyber-Physical Systems

This letter proposes a threat discrimination methodology for distinguishing between sensor replay attacks and bias faults, based on the specially designed watermark integrated with adaptive estimation. For each type, is changes that imposes system. Threat conditions are rigorously investigated to characterize quantitatively class of faults can be discriminated by proposed scheme. A simulation presented illustrate effectiveness our approach.