A MODEL OF A SUBSYSTEM FOR GENERATING CRYPTOGRAPHIC KEYS OF THE CYBERPHYSICAL SYSTEM INFORMATION PROTECTION SYSTEM

The study is devoted to improving the subsystem of information protection in the radio channels of acyberphysical system using the example of a robotic complex (RTC). Modern and promising critical conditionsfor the use of RTCs are considered, which determine the sets of requirements for the characteristicsof both RTCs and their subsystems, such as the radio data transmission system (RS) and the informationsecurity subsystem. One of the approaches to meeting the requirements is the unification of theseRTC subsystems, which can be divided conditionally into two scientific and technical tasks: unification ofradio protocols and unification of information security tools in RS radio channels. The paper presents thepractical problems obtained as a result of the analysis, which lie at the intersection of two areas of research– RS and information security subsystems. A hypothesis has been formed about the potential foreffective resolution of one of these practical problems – providing an information protection system withcryptographic keys - by including a cryptographic key generation subsystem (CKGS) from biometric dataused as the initial key information in the RTC information protection system. The proposed improvementhas several aspects – regulatory, economic, and technical. The paper examines only the scientific andtechnical side of the issue, as a result of which a functional model of the CKGS is proposed, which providesa study of the possibilities of the modeled subsystem for the implementation of the formulated principlesof functioning. The purpose of the work is to develop a model of the CKGS functioning for the cryptographicinformation protection system in the RS RTC radio channels and the formation of its algorithmiccontent. The object of research is a system of cryptographic information protection in RS radio channels.The subject of the research is an algorithm for generating cryptographic keys for a cryptographic informationprotection system in RS RTC radio channels. To achieve this goal, a class of abstractions involvedand a methodological apparatus are substantiated that uses the provisions of the theory of algorithms toprove the existence of an algorithm that solves a formulated mass problem and has specified non-trivialsemantic properties. Research methods – analysis, analogy, synthesis, decomposition, abstraction. Themain mass problem and the hypothesis of its solvability are formulated. In order to test the hypothesis, thecorresponding theorem is formulated and proved. The proposed model makes it possible to prove the jointeffective feasibility of various information processing algorithms