Patent ID: 7034676

Claim:
A securing method for securing an object against unauthorized use, comprising: transmitting an interrogation signal (s) by an interrogation unit ( 1 ) allocated to the object, by a response unit ( 2 ) allocated to a user, responding to the interrogation signal (s) by transmitting a response signal (r), testing whether the response signal contains as information an authorization code authorized for desecuring a security device ( 3 ), and evaluating a signal transit time of the interrogation signal transmitted by the interrogation unit and the response signal transmitted by the response unit and received by the interrogation unit during a monitoring time interval (t 4 –t 5 ), and preventing a desecuring of the security device ( 3 ) if the signal transit time is greater than a prescribed value, wherein the interrogation signal (s) contains a first data bit sequence (Dl) as information and the response signal contains a second data bit sequence (D 2 ) as information, wherein data bits of the first and second data bit sequences (D 1 , D 2 ) are transmitted in bit cells of equal size, and the interrogation unit ( 1 ) simultaneously transmits data bits of the first data bit sequence (D 1 ) and receives data bits of the second data bit sequence (D 2 ) in the monitoring time interval (t 4 –t 5 ), the first data bit sequence (D 1 ) is composed of an interrogation code and a filler code adjoining the interrogation code, and the response unit, for generating the second data bit sequence (D 2 ), generates a response code (AO) from the interrogation code, wherein the response code is encoded bitwise with simultaneously received bits of the filler code and transmitted.