human factors and usability issues have traditionally played a limited role in security research and development of secure systems. Security experts have been ignored usability issues - both because they often fail to recognize the importance of human factors and because they do not have the expertise to handle it. But there is a growing recognition that the current security problems can be solved only by addressing the problem of usability and human factors. Indeed, the world's future security depends on the spread of cyber security technologies that can be widely used by untrained computer users. However, many people believe there is inherent tradeoff between computer security and usability. It is true that a computer without a password that can be used, but not very secure. Simson Garfinkel, and authored by cutting-edge security and human-computer interaction (HCI) researchers around the world, this book is expected to become both a classic reference and an inspiration for future research. Security & Usability group of 34 essays into six parts: Realigning the Usability and Security --- with careful attention to user-centered design principles, security and usability can be synergistic. Secure Systems - how system software can provide or destroy a secure user experience. Commercialize Purpose: Vendor Perspective - specific experiences of security vendors and software (eg, IBM, Microsoft, Lotus, Firefox, and Zone Labs) in addressing usability.