Joint Spectrum Sensing and Spectrum Access for Defending Massive SSDF Attacks: A Novel Defense Framework

Multiple secondary users (SUs) perform collaborative spectrum sensing (CSS) in cognitive radio networks to improve the performance. However, this system severely degrades with data falsification (SSDF) attacks from a large number of malicious users, i.e., massive SSDF attacks. To mitigate such attacks, we propose joint and access framework. During sensing, each SU compares decisions CSS independent (IndSS), then reliable are adopted as its final decisions. Since transmission slot is divided into several tiny slots, at stage access, assigned specific time slot. In accordance decisions, node separately accesses Simulation results verify effectiveness proposed algorithm.