This master thesis deals with all types of wireless networks security – in personal, local, metropolitan and also mobile networks. This work is mostly focused on wireless local area networks (WLANs), which are the most widespread at nowadays. This work describes attacks to the wireless local area network, attackers steps and possible protection against it. Some of these attacks are tested in practical part of this work. In this master thesis there were also designed and created two laboratory exercises. One of them is a simulation in the wireless network using Opnet Modeler application. The other exercise is strictly practical type.

Master´s thesis „Security risks of wireless access networks“ deals with wireless access networks, which are the most widespread in this time. The main target is realization of attacks wireless access networks protected by various using methods. This thesis shows main securities gaps, which originate from project this networks. These securities gaps are used for realization attacts in practical part. In the next part I took attention of network´s monitoring possibilities.

This study explores the application of wireless local area network (WLAN) in retailing industy for enhancing experiential marketing. As competition in the retailing industry increases, added with new entrants competing for old customers, department stores nowadays must consider new ways of attracting customers. Against that backdrop , experiential marketing becomes increasing important. Taking Kaohsiung¡¦s six department stores as cases for study, the author conducted a two-wave survey to examine whether and to what extent visitors of deparment stores appreciate the introduction and possible deployment of wireless local area networks as a means for enhancing experiential marketing. Using analytic hierarchy process (AHP) as a research method, this study sorts out not only the key success factors of introducing wireless Internet in the context of department stores but also the priority setting of those key success factors, which includes seventeen elements falling into five categories. Broadly put, marketing and promotion stands out as the first priority setting, followed by business model and infrastructure. The finding of such priority setting has deep implications for experiential marketing which also falls into five modules of analysis: sense, feel, think, act and relate. It shows that visitors are more satisfied with the aspects of sense and feel, whereas the other three leave rooms for improvement. By introducing and deploying information and communications technologies, such as WLAN, that weakness of experiential marketing can be improved.

Through technological innovation and various stages of standardisation, wireless Internet has developed into a powerful business tool. Nowadays, business becomes not only e-business but also mobile business, or m-business, where business is done via mobile devices. This is especially true in industries where the provision of real-time and location-based information is important. Cultural tourism is one evident example of such industry. And museum might be the best testing ground for the effective use of wireless Internet in cultural tourism. Taking Taiwan¡¦s five national museums as cases, this study explores the current wireless deployment and the applications with it. It specifically examines whether and to what extent museum visitors would appreciate such deployment. After a thorough literature review, the author sorts out seven dimensions (comprising 40 elements) for the first wave of survey. Using fuzzy analytic hierarchy process (FAHP), the author further finds out the priority setting of those key success factors. The priority settings fall into three groups according to their significance. Connectivity and content design are perceived as the most important. The second group inlcudes, information content, marketing and promotion, and user¡¦s experience. The least urgent dimensions for wireless Internet development are applications and business model. This study should contribute to the understanding of applying new information and communications technologies (ICTs) in museum exhibitions. It suggests that museums should consider enhancing experiential marketing by thoughtful introduction of ICTs, notably wireless Internet application such as WLAN. This study is also characterised by using FAHP for sorting out the priority settings in the minds of museum visitors and related experts.

Every environment is susceptible to risks and Wireless Local Area Networks (WLANs) based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard are no exception. The most apparent risk of WLANs is the ease with which itinerant intruders obtain illicit entry into these networks. These intrusion security risks must therefore be addressed which means that information security risk analysis and risk management need to be considered as integral elements of the organisation’s business plan. A well-established qualitative risk analysis and risk management methodology, the Operationally Critical Threat Asset and Vulnerability Evaluation (OCTAVE) is selected for conducting the WLAN intrusion security risk analysis and risk management process. However, the OCTAVE risk analysis methodology is beset with a number of problems that could hamper a successful WLAN intrusion security risk analysis. The ultimate deliverable of this qualitative risk analysis methodology is the creation of an organisation-wide protection strategy and risk mitigation plan. Achieving this end using the OCTAVE risk analysis methodology requires an inordinate amount of time, ranging from months to years. Since WLANs are persistently under attack, there is a dire need for an expeditious risk analysis methodology. Furthermore, the OCTAVE risk analysis methodology stipulates the identification of assets and corresponding threat scenarios via a brainstorming session, which may be beyond the scope of a person who is not proficient in information security issues. This research was therefore inspired by the pivotal need for a risk analysis and risk management methodology to address WLAN intrusion attacks and the resulting risks they pose to the confidentiality, integrity and availability of information processed by these networks. Copyright / Dissertation (MSc (Computer Science))--University of Pretoria, 2006. / Computer Science / unrestricted

京都大学 / 0048 / 新制・課程博士 / 博士(情報学) / 甲第20031号 / 情博第626号 / 新制||情||109(附属図書館) / 33127 / 京都大学大学院情報学研究科通信情報システム専攻 / (主査)教授 守倉 正博, 教授 原田 博司, 教授 梅野 健 / 学位規則第4条第1項該当 / Doctor of Informatics / Kyoto University / DGAM

Approved for public release; distribution in unlimited. / In spite of the fact that wireless network technology has been available for long period of time, there has been very limited wireless networks deployments around the world before 1997 due to the lack of widely recognized standard for wireless networks. Thanks to the approval of the IEEE 802.11 family of standards in 1997, the world has witnessed tremendous deployment and proliferation of wireless networks in all aspects of life. Although the IEEE 802.11 family of standards has been ratified to design radio transceivers for wireless computer stations capable of interconnecting with other wireless computer stations in close proximity, the technology has been successfully employed to design and implement wireless networks with great number of distant wireless computer stations with reasonable data throughput and flexibility. This thesis explores the wireless network technology and the primary building blocks and components of a wireless network. It also explores the IEEE 802.11 standard and its technical specifications including the Physical layer (PHY), the Media Access Control layer (MAC) and the ongoing task forces. Additionally, the thesis examines the wireless network security including the vulnerabilities, ongoing improvements and recommendations. Next, it investigates the market for available wireless devices compatible with the IEEE 802.11 standard that can be used to build a wireless network with high data throughput and high level of security. Subsequently, the thesis formulates a design plan for civilian wireless network with different scenarios in order to provide a speedy solution to the limited broadband service availability in the Sultanate of Oman. Additionally, the thesis formulates a generic design plan for a military wireless network with different scenarios that can be rapidly deployed in the field of operations. / Computer Engineer, Royal Army of Oman

In this thesis, the study mainly focuses on the current trends in development of compact multi-media mobile phone and provides a wideband monopole antenna design suitable for application in wireless communicating system in the near future. By utilizing the planar monopole antenna structure, the proposed antenna design is easy to be embedded into the mobile phone. Further, by using a shielding metal cover, we create a zone with low surface current distribution. This effect will reduce the electromagnetic coupling between the antenna and the electronic elements and make it possible to integrate more related elements into the mobile phones. Finally, we use the simulation software to analyze the dielectric effect caused by the casing of mobile phone and human body on the proposed antenna.

This study explores the application of wireless local area network (WLAN) in mobile learning. Although still in its infancy, Taiwan¡¦s government has devoted much resource on mobile learning as the extention of e-Taiwan project. National museums are among the key projects where the effectiveness of mobile learning can be soundly demonstrated. Taking national museums as observing objects, this study examines whether museum visitors appreciate WLAN environment within which personal digital assistants (PDA) operate as mobile educational tools. It further explores the key success factors that leads to successful deployment of mobile learning system. The researcher conducted a two-wave survey, firstly on museum visiters then on museum and e-learning experts for data gathering. Using analytical hierarchy process (AHP) as the research method, this study filters out the priority setting of those six categories as follows according to their significance: learning content, network connection, interface design, mareking and promotion, and business model. It also shows that the priority setting might change as a matter of time. As far as implication for education is concerned, the study suggests that, in the learning space of museum, PDA equipped with WLAN proves to be an appropriate mobile learning tool, notably useful in conducting blending learning and self-directed learning. Such finding should contribute to the understanding and further deployment of mobile learning activities in the context of museums. Keywords: wireless local area network (WLAN), mobile learning, blending learning, self-directed learning, personal digital assistant (PDA), fuzzy analytical hierarchy process (FAHP), key success factors, museum

Increasing number of ageing population and people who need continuous health monitoring and rising the costs of health care have triggered the concept of the novel wireless technology-driven human body monitoring. Human body monitoring can be performed using a network of small and intelligent wireless medical sensors which may be attached to the body surface or implanted into the tissues. It enables carers to predict, diagnose, and react to adverse events earlier than ever. The concept of Wireless Body Area Network (WBAN) was introduced to fully exploit the benefits of wireless technologies in telemedicine and m-health. The main focus of this research is the design and performance evaluation of strategies and architectures that would allow seamless and efficient interconnection of patient’s body area network and the stationary (e.g., hospital room or ward) wireless networks. I first introduce the architecture of a healthcare system which bridges WBANs and Wireless Local Area Networks (WLANs). I adopt IEEE 802.15.6 standard for the patient’s body network because it is specifically designed for WBANs. Since IEEE 802.15.6 has strict Quality of Service (QoS) and priorities to transfer the medical data to the medical server a QoS-enabled WLAN for the next hop is needed to preserve the end-to-end QoS. IEEE 802.11e standard is selected for the WLAN in the hospital room or ward because it provides prioritization for the stations in the network. I investigate in detail the requirements posed by different healthcare parameters and to analyze the performance of various alternative interconnection strategies, using the rigorous mathematical apparatus of Queuing Theory and Probabilistic Analysis; these results are independently validated through discrete event simulation models. This thesis has three main parts; performance evaluation and MAC parameters settings of IEEE 802.11e Enhanced Distributed Channel Access (EDCA), performance evaluation and tuning the MAC parameters of IEEE 802.15.6, and designing a seamless and efficient interconnection strategy which bridges IEEE 802.11e EDCA and IEEE 802.15.6 standards for a healthcare system.