METHOD OF PROTECTING INFORMATION IN BURST TRANSMISSION RADIO NETWORK Russian patent published in 2011 - IPC H04L12/56 H04W8/30 

FIELD: information technology.

SUBSTANCE: in the method, before radio communication on each user station, cryptographic algorithms are prepared for operation by obtaining variables for generating a first pseudorandom number (PRN1) and a second pseudorandom number (PRN2). The cryptographically protected information is transmitted using a combination cipher defined by PRN1 and PRN2, and synchronised sequences making up the packet, wherein each of these two parts of the packet are modulated with different frequencies defined by PRN2. The cryptographic algorithms are then synchronised in the burst transmission radio network (BTRN) through transmission of current values of PRN1 and PRN2. At the receiving side, the BTRN receives the transmitted digital information by splitting the received mixture into two components: service and encoded information in case of synchronisation of cryptographic algorithms in the BTRN, or service and protected information in case of decryption of the transmitted combined cipher.

EFFECT: protected mode of operation with self-recovery of a burst transmission radio network during passive attack.

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