Smart objects, particularly sensor networks, are vulnerable by
their very nature because of the lack of security support in the
primary design of low lossy networks. Their previous status
did not face the need to ensure secure transmissions. Information
about measurements such as temperature and
humidity is not so attractive for attackers. Nevertheless, the
rapid growth of system automation, the massive production
of sensors and smart devices and their integration in the
smart environments reveal security deficits and raises
possible threats from malicious users. Security add-on
features in an insecure design cannot replace the capabilities
of a securely designed network. Moreover, the limited
resources of smart objects in terms of memory, CPU and
energy make the inclusion of add-on security features even
harder.