Date Added: Jan 2012
Collaborative spectrum sensing is regarded as a promising approach to significantly improve the performance of spectrum sensing in Cognitive Radio Networks (CRNs). However, due to the open nature of wireless communications and the increasingly available software-defined radio platforms, collaborative spectrum sensing also poses many new research challenges, especially in the aspects of security and privacy. In this paper, the authors firstly identify the potential security threats towards the collaborative spectrum sensing in CRNs. Then they review the existing proposals related to secure collaborative spectrum sensing. Furthermore, they identify several new location privacy related attacks in collaborative sensing, which are expected to compromise secondary users' location privacy by correlating their sensing reports and their physical locations.