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Mobile devices are becoming more pervasive and more advanced with respect to their processing power and memory size. Relying on the personalized and trusted nature of such devices, security features can be deployed on them in order to uniquely identify a user to a service provider. In this paper, the authors present a strong authentication mechanism that exploits the use of mobile devices to provide a two-aspect authentication system. Their approach uses a combination of onetime passwords, as the first authentication aspect, and credentials stored on a mobile device, as the second aspect, to offer a strong and secure authentication approach.
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