Encryption and displacement based scheme of defense against Primary User Emulation Attack

Cognitive Radio (CR) is a communication technology based on spectrum sharing. Secondary Users (SU) detect spectrum hole which is not being used by Primary Users (PU) through spectrum sensing. The situation of lack of network resource can be solved by the CR network. The key of the CR is to let SU use the free spectrum without impacting on the Primary Users. Under the policy of priority difference, attackers can compete for the network resource viciously. Based on the analysis of CR, this paper proposed an encryption and displacement based scheme of defense against PUEA, which solves the problem of air interception that traditional method cannot settled. Then the specific design scheme is depicted and the availability and feasibility of this scheme is proved.