Preface

Abstract

This issue of the Journal of Telecommunications and Information Technology contains eleven papers that deal with a wide range of problems related to the security of computer and industrial networks, focusing primarily on assessing risks that affect critical infrastructures, as well as on protecting mobile service robots, the Internet of things and blockchain systems against cyber-attacks. The articles deal also with wire and wireless communications, various aspects of energy conservation in data centers and computer networks, and with the application of modern multimedia techniques in didactics. (...)