of Things (IoT) refers to the next
generation of Internet which will contain trillions of nodes
representing various objects from small ubiquitous sensor
devices and handhelds to large web servers and
supercomputer clusters [23]. It is the next technological
revolution after the revolution of computer and Internet. It
integrates the new technologies of computing and
communications (eg. sensor networks, RFID technology,
mobile communication technologies, real-time
localization, ubiquitous computing and IPV6 etc.) and
builds the development direction of the next generation of
internet. IoT is the core of Smart Planet that is proposed
by IBM Corporation. Smart objects of the Internet of
Things (eg. sensor inputs, actuators etc.) are able to
communicate via the internet based on the new
technologies of information and communication.
S. Haller et al.[2] have given the following definition of
IoT : “A world where physical objects are seamlessly
integrated into the information network, and where the
physical objects can become active participants in
business process. Services are available to interact with
these ‘smart object’ over the Internet, query their state and
any information associated with them, taking into account
security and privacy issues.”
Prof. Liu [3] has provided the ideas of IoT from the
aspects of technology and economy respectively: “From
the viewpoint of technology, IoT is an integration of
sensor networks, which include RFID, and ubiquitous
network. From the viewpoint of economy, it is an open