PreMSat: Preventing Magnetic Saturation Attack on Hall Sensors

Spoofing a passive Hall sensor with fake magnetic fields can inject false data into the downstream of connected systems. Several works have tried to provide defense against intentional spoofing different sensors over last six years. However, they either only work on active or externally injected unwanted weak signals (e.g., EMIs, acoustics, ultrasound, etc.), which spoof output in its linear region. do not strong attack that drive saturation We name this as attack. In region, gets flattened, and no information be retrieved, resulting denial-of-service sensor.Our begins fill gap by providing named PreMSat sensors. The core idea behind is it cangenerate an internal field having same strength but opposite polarity external attacker. Therefore, generated nullify while preventing: (i) sensor’s (ii) integrates low-resistance path collect utilizes finely tuned PID controller real-time. prevent up ?4200 A-t within frequency range 0 Hz–30 kHz low cost (?$14), whereas existing cannot attacks any strength. Moreover, originating from type, such constant, sinusoidal, pulsating fields. did 300 experiments ten industry-used four manufacturers prove efficacy found correlation coefficient between before after greater than 0.94 every test case. we create prototype evaluate performance practical system — grid-tied solar inverter. find satisfactorily