Method of Detecting Radio Signals using Means of Covert by Obtaining Information on the basis of Random Signals Model. - Oleksandr Laptiev; Vitalii Savchenko; Andrii Pravdyvyi; Ivan Ablazov; Rostyslav Lisnevsky; Oleksandr Koloss; Viktor Hudyma (Int. J. Commun. Networks Inf. Secur., 2021)