Futuristic Trends in Network and Communication Technologies Third International Conference, FTNCT 2020, Taganrog, Russia, October 14–16, 2020, Revised Selected Papers, Part I - Singh, Pradeep Kumar; Veselov, Gennady; Vyatkin, Valeriy; Pljonkin, Anton; Dodero, Juan Manuel; Kumar, Yugal (Springer Singapore, 2021)