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Human Computer Interaction (HCI) emerged as a field of research with the purpose of studying the interaction between user and computer technology. In the challenging world every system is build to satisfy users needs by some specific operation in the system but the more important challenge is to create a usable or user-friendly system. Usability is acted with end-user by an interaction between user and the system. This interaction is maintained by user interface. But to the software engineer, usability is just one of the many aspects that must be taken into account in the development process...

Due to the flexibility and mobility of wireless technologies; Bluetooth, Zig-bee, RFID, WiMAX etc. have become most commonly used medium of wireless communication. Although the demand of these technologies is rapidly increasing all over the world, very few of us are aware about the security issues related to them. A number of attacks is possible to make illegal access to our system if we do not know how to protect our system from intruders. This book focuses on security threats and countermeasures of Bluetooth, MANET and WiMAX. The readers will get to know about different types of ...