Abstract: A method and a system for identifying a network-connected sensor device based on electrical fingerprint. The method may include the following steps: applying, at specified time slots, a set of electrical measurements to a sensor being connected to a network of sensors, to yield a set of electrical parameters; deriving data measured by the sensor at said time slots; representing, for at least some of the time slots, the set of electrical parameters and the corresponding data measured by the sensor, as a vector in a single samples space; and applying machine learning techniques to the vectors in the samples space, to derive a sensor-specific fingerprint of the sensor.