Method of univalent and one-to-one association between emitters and receivers of transmission on the basis of the propagation channel

Method of univalent and one-to-one association on the basis of the propagation channel (AU_CP) between a first user A and a second user B each furnished with one or more transmission emitters/receivers (NA in number and denoted A1... ANA for the user A, NB in number and denoted B1... BNB for the user B), the said association, carried out without previously known or shared key, being secure in relation to any unauthorized third party E (likewise furnished with receivers and if appropriate with emitters) even before the establishment of the transmission protocol between the users A and B, with the aid of prior transmissions of interrogation signals and of acknowledgement signals and with the aid of measurements of the propagation channels between the emitters receivers of A and those of B by virtue of these interrogation and acknowledgement signals, the said association being intended to subsequently facilitate the establishment of a transmission, protected in relation to E, between the users A and B as well as the identification of A by B and of B by A, the checking of confidentiality and the checking of integrity of the messages exchanged by A and B.