Abstract: A safety system including an electronic key that has a transmitter, and a protected object having a radio base station which includes a receiver, is provided. The transmitter and the receiver are designed to communicate in order to exchange authentication data. The radio base station regularly monitors the natural high frequency (HF) signal level received on the part of the receiver and detects interferences in the natural HF signal level, so as to make possible the detection of a relay station.

Abstract: Method for allocating a remote controller to a base station, having the following steps: emission of a search signal by the base station, reception of the search signal, comparison with a reference signal, and emission of a “present” signal by the actuation element if the search signal matches the reference signal. If no “present” signal arrives in response to a search signal, emission of a search signal by the base station is repeated after a repetition time has elapsed. Execution of the method is accomplished by way of a base station which has means for detecting the time Ts that has elapsed since emission of a search signal, and by way of a remote controller which switches from an idle state into an active state upon arrival of a search signal.