FIELD: physics.
SUBSTANCE: invention relates to prevention of fraudulent telephone calls due to mutual authentication of mobile communication subscribers when establishing a connection. Primary identification of users of subscriber devices is used, assignment of a unique identifier to each subscriber device, wherein when making an outgoing call, each subscriber device is authenticated on a remote server and, depending on the assigned identifier, a dynamic password is added to the acoustics of the outgoing call using software. Dynamic password is a sequence of one or more acoustic signals transmitted during a given period after establishing a connection to the mobile communication terminal of the subscriber receiving the incoming call, characteristics of the dynamic password are pre-matched and include the moment of the beginning of the acoustic signal emission, and/or the acoustic signal frequency, and/or the acoustic signal amplitude, and/or the number of time intervals of the signal emission, and/or duration of each interval in which signal is emitted and/or duration of intervals between signal emissions, dynamic password is also processed by software.
EFFECT: high security of mobile communication subscribers exchanging information through voice, due to high reliability of determining the identity of the subscriber making an incoming call.
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