DEVELOPMENT OF A METHODOLOGY FOR BUILDING A MULTI-CIRCUIT INFORMATION RESOURCE PROTECTION SYSTEM IN CYBER-PHYSICAL SYSTEMS

Relevance of the topic. This paper presents a methodology for constructing a multi-layered information security system for cyber-physical systems (CPS), addressing modern challenges related to hybrid and post-quantum threats. The purpose. Concept formation based on five stages: threat probability assessment, preventive modeling, game-theoretical analysis, implementation of post-quantum cryptographic mechanisms (LDPC-based CCS), and multi-contour security architecture development. Results. The effectiveness of protection is evaluated using KPI(eff), KPIeffinv, and KPInorm indicators, particularly in the context of mobile wireless technologies (LoRa, Sigfox, LTE-M, NB-CPS). A modification of the Go-Back-N protocol is proposed to enhance functional efficiency in wireless memory channels. Conclusions. The proposed models can be applied in the development of secure CPS for critical infrastructure and industrial IoT systems.