Date Added: Nov 2012
Distributed collaborative spectrum sensing is a promising method to improve the precision and efficiency of primary user detection in cognitive radio networks. Despite its performance advantages, it introduces new security issues that malicious or selfish nodes may manipulate false sensing data to degrade or even covert the sensing result of the whole network. Existing research often utilizes a threshold to distinguish honest users and malicious ones. However, determining such a threshold is difficult due to the dynamic characteristic of cognitive radio networks, and it is likely to misjudge an honest node with a relatively large deviation to be malicious. users.