At present, we are on the verge of a technological revolution, called the Internet of Things (IoT). The IoT term was coined by Ashton in 1999 [5], and represents the future of computing and communication, where all the objects in the
world will be able to be ‘connected’ one another, and share their status and surroundings, finally providing new innovative servicestohumans(evenwithouthumanintervention)[6].This is mainly due to the advances in ICT such as identification systems (RFID), short-range wireless communication (ZigBee [7], Bluetooth,WiFi),andcellularnetworks[8]andwidespreaduse of smartphones.