The Impact of Byzantine Attack Strategies on Cooperative Spectrum Sensing Performance

In Cognitive radio (CR) networks, Byzantine attack is a threat to the spectrum sensing. In the so-called attack,some malicious CR users intentionally report wrong local spectrum sensing results to a fusion center (FC) andconsiderably disturb the global spectrum sensing decision. In this paper, we investigate three different types ofByzantine attacks, always yes (AY), always no (AN) and always false (AF) attackers. The AY attackers increase theglobal false alarm probability and the AN malicious attackers decrease the global detection probability. In addition, theAF Byzantine attackers decrease the global detection probability and increase the global false alarm rate. We carry outsimulations with a conventional majority fusion rule under three types of Byzantine attack strategies. We also performnumerical analyses to illustrate these attack scenarios on the global detection, false alarm and correct sensingprobabilities.

Keywords:

Attack strategy , Byzantine attack , Cognitive radio , Cooperative Spectrum sensing