Evaluation of cyber security of intelligent transportation systems with a multi­level information protection system

Abstract

Aim. To examine the assessment of cyber security of intelligent transportation systems with a multi-level information protection system. For the purpose of preventing attacks aimed at capturing information in a multi-level protection system, it is proposed to implement a fully connected core of the local area network (at all levels). This enables random trusted paths that are dismantled upon transmitting the information, i.e. are limited in their time of existence. Communicating information along randomly selected trusted limited-lifetime paths complicates internal attacks that aim to capture network entities involved in the communication of critical information. Methods. The paper uses methods of mathematical analysis, graph theory, and probability theory. Results. The authors examine a model of traffic capture by an attacker, whereas the defender uses random pathing in a fully connected network. A model of information protection in a multi-level information protection system was assessed. It is proposed using dynamically organised trusted paths in fully connected environments when designing a multi-level protection system to prevent interception of information flows. Conclusion. The proposed technique allows estimating the decrease in the probability of vertex capture in a fully connected network, as well assessing the probability of vertex capture depending on the duration of message transmission.