| Access Points(APs)are network access points which are core components of Wi-Fi-based Wireless Local Area Networks(WLANs).With the development of wireless smart devices such as tablets and smartphones,wireless networks have become the main way people connect to the Internet in their daily lives.Wireless Network Technology Based on 802.11 Communication Protocol WLANs have the advantages of fast speed,low cost,simple distribution network,convenient installation and high user familiarity.Wireless networks bring many conveniences to people’s lives,but at the same time,they bring many new security issues that can not be ignored.For example,privacy leaks caused by monitoring of wireless network communication data or property loss caused by tampering of data may occur.A very important reason for these problems is the wireless LAN has a lot of insecurity,in which the rogue AP is the most harmful of Wi-Fi wireless networks,there is the most common and difficult to prevent network attacks.In this paper,aiming at the problem of rogue AP network in wireless local area network,this paper proposes a rogue AP detection model based on fingerprint feature and completes a complete rogue AP detection system based on the proposed detection model.The innovation of this paper and the main research work are as follows:(1)Studied the security problems existing in wireless local area network.By researching and studying the wireless communication protocol and communication data,we proposed the use of MAC address,network channel and Beacon frame sequence number to detect rogue AP filtering.(2)Based on the analysis of the timestamps in Beacon frames and the capture time of Beacon frames,a least squares algorithm is proposed to extract the clock skew that can represent the fingerprint of AP.Through the variation of the clock bias and comparison,it is determined whether there is a rogue AP or the rogue AP existence probability skewP is used as a further detection.(3)Based on the influence of AP signal strength and signal intensity,the paper proposes the use of Gaussian distribution model to extract the signal fingerprints that can represent the relative position of AP.Under the circumstance that the clock deviation fingerprinting can not be determined,Rogue AP detection completed.(4)Based on the proposed rogue AP detection model,a rogue AP detection system is completed,and an AP is designed and a test scheme is designed.The testing of the pseudo AP detection model and the test of the pseudo AP achieved are completed.Experimental results show that the proposed rogue AP detection model and the implemented rogue AP detection system have high accuracy,high speed,low cost and simple configuration,so as to detect whether the rogue AP exists in the surrounding environment timely or accurately. |
