Malicious Exploitation of Byzantine Attack for Cooperative Spectrum Sensing

Cooperative spectrum sensing (CSS) is crucial for cognitive radio (CR) to improve spectrum sensing performance. However, the cooperative paradigm is threatened by Byzantine attacks. To ensure the security and energy efficiency (EE) of CSS, in this paper, we propose a malicious exploitation algorithm. Firstly, we distinguish normal users (NUs) from malicious users (MUs) based on the historical performance of secondary users (SUs). Unlike most previous studies, we innovatively improve CSS detection performance by exploiting sensing information from MUs. In addition, we select specific SUs instead of all SUs in data fusion, which reduces the number of samples submitted by SUs to the fusion center (FC). Finally, we further introduce a sequential differential mechanism that substantially reduces samples to improve the EE of CSS. Finally, the numerical simulation results validate the effectiveness of our proposed algorithm.