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Journals and Conferences
A number of recent scams and security attacks (phishing, spyware, fake terminals, ...) hinge on a crook's ability to <i>observe</i> user behavior. In this paper, we describe the design, implementation, and evaluation of a novel class of user authentication systems that are resilient to observation attacks. Our proposal is the first to rely on the human… (More)
The best way to learn abstract knowledge in the initial phase is to liken it with some concrete illustrations. For example, we start acquiring literacy by using a picture storybook. Children notice the correspondence between the picture and the shape of the characters beside it first, and acquire literacy step by step. In this research, we aim to develop a… (More)
This research aims to develop a new methodology and its supporting technologies for learning about computation and programming in the introductory stage through a hands-on playing experience with toys. This allows a beginner to acquire the concepts and knowledge of computation and programming by playing with a model railway set.