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Now-a-days, users consume digital services with their digital identities on a multitude of different devices, e.g. notebooks, Smartphone or even TV sets. Hereby, users are faced with additional challenges, i.e., devices have different security levels and not all digital identities must be used on all devices. Identities used for home banking should not be used on an insecure device and business identities should only be used on business devices. Moreover, it should be possible to switch between devices in a seamless way without the need to re-authenticate again on each device. Therefore, the authors propose an architecture that integrates all user devices and exploits identity management systems for ubiquitous user authentication.
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