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The Cognitive Radio Network (CRN) is nothing but the future communication technology. The use of CRN is increasing worldwide which resulted into the problems like suffering from of inefficient spectrum allocation and QoS challenges. Efficient spectrum distribution technique becomes new problem for research in use of CRN. A most important challenge for the new technology is how worthy assignment can be made of the spectrum available to uncertified users. Along with spectrum efficiency, security is also major issue in CRN. There are many recent efficient routing protocols presented for spectrum efficiency for QoS improvement, but very few methods presented for CRN security. Therefore, in this project we are presenting novel routing protocol to perform security aware and QoS aware routing functionality for CRNs.

First, we are designing the dynamic clustering-based routing protocol to optimize the spectrum sensing and allocation performance ie QoS enhancement. The proposed clustering method is based on ACO based optimization technique and dynamic re-clustering solution. This solves the problem of frequent and unnecessary re-clustering of state-of-art clustering solutions. Second, we introduce the light weight malicious nodes attack detection mechanism based on trustbased evaluation of each target node by utilizing the channel allocation information. The anticipated protocol is called as Security and QoS Aware Dynamic Clustering (SQADC) Routing protocol.