Galakhov Y. Cyberattack models in the enterprise information security system based on the use of a freelance resource

Thesis for a Candidate Degree in Engineering, specialty 21.05.01 “Information Security of the State”. – State University of Telecommunications, Kyiv, 2020. The article deals with the actual scientific problem of developing a scientific and methodological apparatus for determining the connection between the level of cyber risk and the frequency of audit, which makes it possible to provide effective automation of cyber security processes of an enterprise that attracts a freelance resource. The technique of determining the optimal time for special audit under the conditions of elasticity and sensitivity of the cyberattack intensity function is proposed, which differs from the existing ones in that the functional dependence of the cyberattack intensity is described by a nonlinear Bernoulli differential equation and is subject to the logistic law. The results of mathematical modeling of the enterprise cyber risk management process based on Fourier series make it possible to increase the reliability of decision making regarding the planned audit time by 12 – 15 % due to the transition of the enterprise cyber threats audit system from a discrete to continuous automated audit process.