Spectrum Sensing Data Falsification Attack Reputation and Q-Out-of-M Rule Security Scheme.

Cognitive Radio Networks equipped with dynamic spectrum access are envisioned to address spectrum scarcity by allowing secondary users (SU) to utilise vacant spectrum bands opportunistically. The SUs utilise cooperative spectrum sensing (CSS) to make accurate spectrum access decision and to avoid interference. Unfortunately, malicious users can cooperate with SUs and share false observations leading to inaccurate spectrum access decision. The Spectrum Sensing Data Falsification (SSDF) attack is caused by malicious users. In this study, we investigated the SSDF attack and a dynamic defence mechanism called the reputation and q-out-of-m rule scheme designed to address the effects of SSDF attack. The scheme was implemented in cognitive radio ad hoc networks. The fusion node was not considered. The success, missed detection, and false alarm probabilities were considered as evaluation metrics and the MATLAB simulations.