FIELD: physics.
SUBSTANCE: invention relates to authentication of satellite radio navigation signals. Radio navigation system comprises several on-board satellites transmitters and at least one ground receiver, wherein receiver is configured to obtain radio navigation signals from each of several transmitters, wherein each of the transmitters and the receiver are configured to obtain access to the predetermined first key sequence, and wherein the first key sequence comprises a first encryption key and one or more other encryption keys, wherein the system comprises a first group of transmitters from among multiple transmitters, wherein each transmitter in the first group of transmitters is configured to operate to transmit a first radio navigation signal, the first radio navigation signals including the radio navigation data, the message authentication code (MAC) and one of the number of one or more other encryption keys, wherein receiver is configured to operate, after full or partial reception of first radio navigation signal from one or more of first group of transmitters, for authentication of the first radio navigation signal received from one of the first group of transmitters, based on one of the number of one or more other encryption keys, received from this transmitter or from any other transmitter in the first group of transmitters.
EFFECT: technical result is possibility of authentication of radio navigation signals with optimum level of stability and accessibility.
24 cl, 6 dwg
