The use in a radio authorisation system comprising at least a first and a second object, wherein by means of the radio authorisation system a plurality of symbols and/or chips with a first symbol or chip rate is transmitted encoded in at least a first analogue data signal from the first to the second object and/or from the second to the first object, wherein the radio authorisation system is arranged to effect release by at least one release signal of the second object to the first object, by means of at least one release signal of the second object to the first object, a release is brought about, a measure of the spectral distribution of an input signal received at the first object being compared with at least one predetermined span, the predetermined span being determined by the radio authorisation system exclusively on the basis of data and/or signals of the radio authorisation system which are predetermined in the radio authorisation system, and a. the received input signal is evaluated as an attack and/or as a signal foreign to the radio authorisation system and/or a release is denied if the measure of the spectral distribution is outside said at least one predetermined range, and b. is evaluated as a signal of the radio authorisation system and/or a release is effected if the measure of the spectral distribution is within said at least one predetermined range, wherein the second object is arranged to emit said at least one enabling signal, wherein the measure of the spectral distribution of said at least one enabling signal lies within said at least one predetermined span, wherein said at least one enabling signal is and/or is determined exclusively on the basis of data predetermined in the radio authorisation system and/or on the basis of signals of the radio authorisation system by the radio authorisation system, wherein said at least one enable signal is part of said at least one first analogue data signal and information is encoded in the enable signal in a plurality of symbols and/or chips. wherein by means of the radio authorisation system a plurality of symbols and/or chips with a first symbol or chip rate is transmitted encoded in at least a first analogue data signal from the first to the second object and/or from the second to the first object, wherein the radio authorisation system is arranged to effect release by at least one release signal of the second object to the first object, by means of at least one release signal of the second object to the first object, a release is brought about, a measure of the spectral distribution of an input signal received at the first object being compared with at least one predetermined span, the predetermined span being determined by the radio authorisation system exclusively on the basis of data and/or signals of the radio authorisation system which are predetermined in the radio authorisation system, and a. the received input signal is evaluated as an attack and/or as a signal foreign to the radio authorisation system and/or a release is denied if the measure of the spectral distribution is outside said at least one predetermined range, and b. is evaluated as a signal of the radio authorisation system and/or a release is effected if the measure of the spectral distribution is within said at least one predetermined range, a. the received input signal is evaluated as an attack and/or as a signal foreign to the radio authorisation system and/or a release is denied if the measure of the spectral distribution is outside said at least one predetermined range, and b. is evaluated as a signal of the radio authorisation system and/or a release is effected if the measure of the spectral distribution is within said at least one predetermined range, wherein the second object is arranged to emit said at least one enabling signal, wherein the measure of the spectral distribution of said at least one enabling signal lies within said at least one predetermined span, wherein said at least one enabling signal is and/or is determined exclusively on the basis of data predetermined in the radio authorisation system and/or on the basis of signals of the radio authorisation system by the radio authorisation system, wherein said at least one enable signal is part of said at least one first analogue data signal and information is encoded in the enable signal in a plurality of symbols and/or chips.