Development of a model for determining the efficiency of various types of data transmission systems taking into account the requirements for confidentiality, integrity and availability

The article examines the architectural features of modern military data transmission systems, which are classified into three main types: tactical mobile networks, fixed nodes and cloud platforms of the C4ISR type. It is shown that each of these types has specific advantages and vulnerabilities under the conditions of radio-electronic, cybernetic and infrastructure threats, and their effective combination is critical for ensuring continuous and secure command and control of troops. The need for formalization of the basic criteria of information security: confidentiality, integrity and availability CIA in the form of metric functions is theoretically substantiated, on the basis of which the integral index of security effectiveness SEI is proposed as a weighted combination of CIA components taking into account weighting factors differentiated by system types (tactical, stationary, cloud). Based on the developed model, a comparative analysis of a number of real systems (Delta, Kropyva, GIS Arta, BFT, JADC2) is performed, which allowed to quantitatively assess the level of their security and identify critical risk zones. A matrix for interpreting SEI values is proposed, which provides a transition from quantitative results of multi-criteria assessment to qualitative conclusions and recommendations for improving protection efficiency. The scientific novelty of the work lies in the combination of architectural analysis of military data transmission systems with a formalized SEI model and an interpretative matrix, and the practical significance lies in the possibility of using the obtained results for the design of adaptive, survivable and scalable communication and decision support systems in the field of cyber defense. It is additionally emphasized that the proposed approach provides an instrumental basis for the systematic comparison of different architectures under conditions of multi-component threats. The obtained results can be used when planning the modernization of existing military platforms and creating new solutions aimed at increasing the resilience of the information infrastructure. The application of the SEI model also opens up opportunities for further development of methods for risk-based assessment and optimization of protection measures in conditions of network-centric operations.