Safety device against unauthorized access to an object or against unauthorized use of an object and method for operating the safety device.

摘要

The safety device has an object side transmitter - and receiving unit and a plurality of portable code signal transmitter (4, 5 and 6) on. Each code signal transmitter (4 - 6), the challenge signal is transmitted to the transmitter - and receiving unit has received a response signal generated with a for the code signal transmitter (4 - 6) and sends this characteristic feature for the transmitter - and receiving unit back. The transmitter - and receiving unit receives the answer signals of the code signal transmitter and assigns the received signal in the time domain unambiguously mathematically by means of a transformation equation an output signal in an image area to. The transformed response signals are in the image area with the stored discriminating features of the individual code signal transmitter (4 - 6) are compared and the code signal transmitter (4 - 6) is identified as a result of this comparison.