MODEL OF DYNAMIC SELECTION OF POST-QUANTUM CRYPTOGRAPHIC ALGORITHMS IN INFORMATION AND COMMUNICATION SYSTEMS BASED ON INTEGRATED RISK AND EFFICIENCY ASSESSMENT

Abstract

The article investigates the problem of ensuring cryptographic stability of information and communication systems in the conditions of increasing intensity of cyber threats and development of quantum computing, which reduces the efficiency of classical cryptographic algorithms. An analysis of modern approaches to the application of post-quantum cryptographic algorithms was conducted, which showed their predominantly static nature of use without taking into account the dynamics of changes in the operating environment, risk level and attack parameters. The need to develop adaptive mechanisms for selecting cryptographic algorithms capable of providing an appropriate level of protection in conditions of changing threats was substantiated. A model for dynamic selection of post-quantum cryptographic algorithms based on an integral assessment of efficiency and risk is proposed, which allows taking into account both the technical characteristics of the algorithms (speed, cryptographic stability, resource intensity) and the current state of system security. An integral efficiency indicator and a risk function are introduced within the model, which are formed taking into account the level of vulnerabilities, threat intensity and criticality of information resources. An adaptation mechanism is implemented, which provides automatic review and selection of the optimal algorithm depending on the change in risk in real time. The results of the study indicate that the use of the proposed model creates the prerequisites for increasing the level of cryptographic protection, provides a formalized basis for adaptive management of the system's functioning, and allows for reasonable optimization of the use of computing resources. The results obtained confirm the scientific novelty and practical feasibility of implementing adaptive approaches to cryptographic protection of information and communication systems.

Keywords: post-quantum cryptography, information and communication systems, cryptographic protection, integral risk assessment, adaptive model, dynamic algorithm selection, cybersecurity