FIELD: radio engineering, communication.
SUBSTANCE: method of cryptographic key (120) generation is proposed for protection of communication between two objects (202, 204), besides, this method is performed by the first object (202, 302) as a part of a distributed safety operation initiated by the second object (202, 304), and includes stages, when: at least two parameters (106, 108) are provided (306), of which the first parameter (106) contains or is produced from a row of cryptographic keys (110, 112), calculated by the first object (202) when performing the safety operation, and the second parameter contains or its produced from a marker (116), having a different value at each initiation of the safety operation by the second object (204, 304) for the first object (202, 302); and a key production function is applied (308) to generate a cryptographic key (120) on the basis of the provided parameters (106, 108). Besides, the market (116) contains the excluding OR of the serial number <SQN> and anonymity key <AK>.
EFFECT: improved safety of communication.
20 cl, 10 dwg
