ICETE 2020 is a joint conference aimed at bringing together researchers, engineers and practitioners interested on information and communication technologies, including data communication networking, e-business, optical communication systems, security and cryptography, signal processing and multimedia applications, and wireless networks and mobile systems. These are the main knowledge areas that define the six component conferences, namely: DCNET, ICE-B, OPTICS, SECRYPT, SIGMAP, and WINSYS, which together form the ICETE joint conference.