410 Cyber-Physical Systems: From Theory to Practice
large filed size. Finally, by utilizing cryptographic approaches, the computational security can be
achieved in practical NC-enabled WSNs in CPS.
16.6.2.3 Security via Cooperative Mechanisms
In case of eavesdropping attacks, Lima et al. [25] studied a cooperative scheme with special emphasis
on three different nodes in the NC-enabled WSNs. First, they consider nice but curious nodes, which
they do not ignore the data for which they are not the intended receivers. In the second type, the
eavesdropper is able to wiretap a subset of network links. Finally, the third type of attacker is a
worst-case eavesdropper who is given full access to all the traffic in the network.
16.6.3 COUNTERMEASURES TO ENTROPY ...