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In cognitive radio networks, secondary users (SUs) communicate on unused spectrum slots in the frequency bands assigned to primary users (PUs). Like any other wireless communication system, cognitive radio networks are exposed to physical layer attacks. In particular, we focus on two common attacks, namely, spectrum sensing data falsification and eavesdropping. Such attacks can be counteracted by...
Vehicular Ad Hoc Network (VANET) is envisaged to play an important role in the safety of drivers and passengers when moving on the roads. However, VANET still faces many challenges before it could be deployed. One such challenge is shortage of radio frequency spectrum channels. VANET has been allocated 7 channels for dedicated short range communication at 5.9 GHz band. The 7 channels are likely to...
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