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1.1 The structure of this dissertation This dissertation consists of six chapters. The study starts with an introduction which outlines the purpose and importance of this research at an abstract level (Chapter 1). Chapter 2 discusses the IEEE 802.11 standards briefly from selected literatures as to understand the basis of this technology, the security measures that are available, the security issues that exist in current WLAN practices, and the researches that have been carried out in understanding the wireless security. Chapter 3 describes the research methodology adopted by this study, and Chapter 4 presents experimental results and analysis of the wireless LAN security status in Auckland CBD. In Chapter 5, the major findings from Chapter 4 are presented from the perspective of system deployment and recommendations are made for the improvement of security practices in businesses. The dissertation is summarized and concluded in Chapter 6. 2
Chapter 2 Literature Review 2.1 Introduction In chapter 1, the aim and the structure of this dissertation is discussed. This chapter reviews selected literature in the area of WLANs in general and wireless security in particular. Firstly, this chapter provides an overview of the WLANs architecture. Then the 802.11 standards and the available security features are presented. Finally, the security issues concerning this technology as well researches that have been conducted for WLAN are discussed. 2.2 The WLANs architecture In general the IEEE (Institute of Electrical and Electronics Engineers) 802.11 WLANs is a set of wireless end nodes (stations) that are positioned within a restricted physical area and are capable of establishing radio communication with each other or with the base stations (access points) (Housley & Arbaugh, 2003). The main characteristics of WLAN technology as often discussed in literatures are the physical layer used , radio band, operating range, data rates, security features, as well as the advantages and the disadvantages of those technologies. An overview of the characteristics mentioned previously is represented in Table 2.1. The components in WLANs architecture consist of both physical and logical components. The physical components of the WLAN are the wireless end stations (or sometimes referred to as nodes), and the access points (AP). The wireless end stations which include PDAs, laptops, scanners, workstation, and printers are capable of 3
Page 1 and 2: Exploring Wireless Network Security
Page 3 and 4: Attestation of Authorship “I here
Page 5 and 6: Table of Contents ABSTRACT II ATTES
Page 7 and 8: 5.4 SUMMARY 41 CHAPTER 6 CONCLUSION
Page 9 and 10: List of Tables Table 2.1 Overview o
Page 11 and 12: SNMP Simple Network Management Prot
Page 13: Chapter 1 Introduction Wireless net
Page 17 and 18: 2005). The first advantage of this
Page 19 and 20: 2.3.1 802.11a The 802.11a was relea
Page 21 and 22: multiple output” or simply referr
Page 23 and 24: node is expected to decrypt the cha
Page 25 and 26: Borisov, Golberg and Wagner (2001)
Page 27 and 28: Passive attacks are mostly undetect
Page 29 and 30: describe that most access points (A
Page 31 and 32: protocol, and the SSID. Lin et al.
Page 33 and 34: Chapter 3 Research Methodology 3.1
Page 35 and 36: Figure 3.1 The location and path of
Page 37 and 38: listen for any responding probe res
Page 39 and 40: Chapter 4 Results and Analysis 4.1
Page 41 and 42: Manufacturer Detected % D-Link Corp
Page 43 and 44: 4.2.3.2 ESS (AP) In the day scan, 7
Page 45 and 46: 4.2.5.2 Encryption WLAN in Auckland
Page 47 and 48: The research also discovered that t
Page 49 and 50: Network administrator should ensure
Page 51 and 52: includes but not limited to the fol
Page 53 and 54: integrity and availability are the
Page 55 and 56: Chapter 6 Conclusions 6.1 Introduct
Page 57 and 58: 6.6 Concluding remarks The WLANs is
Page 59 and 60: Carli, M., Rosetti, A., & Neri, A.
Page 61 and 62: Jardosh, A., Belding-Royer, E. M.,
Page 63 and 64: Shimonski, R. J. (2003). Wireless A
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Appendices Appendix 1: Example of D
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Figure A 1 WLANs (Day Scan) Figure
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Figure A 5 WLAN (Day Scan) that are
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Figure A 9 Wireless (Night Scan) wi
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Table A 1 Device Manufacturer (Day
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Table A 3 MAC addresses detected in
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Computer network simulators are ess
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Simulator Web Address Type Scale Ne
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