Research And Application Of Wireless Local Area Network Security Access Technology

With the rapid development of wireless local area network and mobile internet, more and more businesses and schools begin to provide the wireless local area network for users. However, the permeability characteristics of the wireless local area network make it more vulnerable than the wired network. The security issues of wireless local area network will be a research focus in the next few years, therefore, the study of wireless local area network security access technology is of great significance.This paper analyzes the security issues of wireless local area network and conducts an in-depth study of its security access technology. First, this paper studies the prevention of MitM attack in wireless local area network, then, proposes a QR code authentication technology based on fingerprint and applies this technology to the wireless local area network access authentication. Finally, this paper designs and implements an enterprise wireless local area network security access system. Specific works are shown as follows.The significance and the research background of wireless local area network security access technology are introduced in the chapter 1. In this chapter, the research status of wireless local area network standards and certification factors at home and abroad are analyzed.The security threats in wireless local area network and the key technologies in access authentication are introduced in the chapter 2. Moreover, this chapter introduces three common access authentication protocols in wireless local area network and analyzes their strengths and weaknesses.The prevention of MitM attack in wireless local area network is studied in chapter 3. This chapter proposes a MitM attack framework in wireless local area network and tests this MitM framework in the actual wireless network environment under the EAP-TTLS/MSCHAPv2 using different mobile terminals. To prevent this MitM attack, this chapter proposes a dynamic password technology based on two-factor during the initial authentication and a protocol based on two-way Hash chain during the cross-domain authentication. Finally, these technologies are tested and analyzed in this chapter.A QR code authentication technology based on fingerprint is proposed in chapter 4. This technology combines the fingerprint recognition technology and QR codes decoding technology. This chapter introduces the fingerprint recognition technology and QR codes decoding technology and elaborates the process of QR code generation and QR certification in this fingerprint-based QR code authentication technology. In this technology, we use AES encryption algorithm, Data digest algorithm and base64 encoding to ensure the confidentiality and integrity of data. Also we use the compression coding to reduce the length of the fingerprint feature vector.An enterprise wireless local area network security access system is designed and implemented in chapter 5. In this system, we add the fingerprint authentication to the PC client and add the QR code authentication to the Android client. In this chapter, we complete the development of client software (both PC side and Android side) and authentication server software. At last, we test this system in the controller-based enterprise wireless local area network and analyze the advantages and disadvantages of this system.Finally, the conclusion and further work prospect are given in chapter 6. In this chapter, the work of this paper is summarized.