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Публікація Investigation of the Secure Paths Set Calculation Approach Based on Vulnerability Assessment(CEUR-WS, 2021) Yevdokymenko, M.; Yeremenko, O.; Shapovalova, A.; Shapoval, M.; Porokhniak, V.; Rogovaya, N.An approach to the calculation of secure paths based on the routing model taking into account information security risks using the basic vulnerability criticality metrics is proposed and investigated. The approach for calculating route metrics uses obtained expressions, which characterize the information security risk in network links in the case of existing vulnerabilities. The results of the investigation showed that within the approach of calculating secure paths with increasing packet traffic, the paths in the network that contained links with the lowest weights, i.e. had the least weight of compromise, were loaded first. The transmission of the packet flow after overloading the more secure path was carried out in the following paths according to the values of the weights of the communication links. The paths in the network that contained the links with the highest weights were loaded last.Публікація Network Security Approach based on Traffic Engineering Fast ReRoute with support of Traffic Policing(CEUR-WS, 2021) Lemeshko, O.; Yeremenko, O.; Yevdokymenko, M.; Shapovalova, A.; Lemeshko, V.The work is devoted to the approach development and investigation of the network security providing based on Traffic Engineering Fast ReRoute with support of Traffic Policing. The corresponding flow-based mathematical model has been developed where the technological task of secure fast rerouting was presented in the form of a linear programming problem. The novelty of the proposed model is the modification of load balancing conditions and bandwidth protection during fast rerouting, which in addition to the Quality of Service, also considers the probability of compromising the link as an indicator of network security. The routing solutions obtained within the proposed model are aimed at reducing the overload of communication links with a high probability of compromising by redistributing traffic for transmission through more secure network links. The advantage of the proposed solution is that in the conditions of congestion the load balancing is realized on the principles of Traffic Engineering and, if necessary, differentiated limitation of the load entering the network. An additional advantage of the proposed optimization model is its linearity, which focuses on the low computational complexity of the corresponding protocol implementation in practice. Numerical research of the Secure TE-FRR-TP model has confirmed the adequacy and efficiency of routing solutions made on its basis, both in terms of ensuring network security, resilience, and load balancing with traffic policing based on priorities.