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Future wireless networks are moving fast towards all-IP network architectures and mobile operators are expanding their services outside traditional cellular networks becoming multi-access operators. This lays stringent requirements on access security, where implementing consistent security policies over disparate radio accesses becomes a challenge. In this paper, the authors introduce a novel host and user authentication protocol based on a lightweight Host Identity Diet Exchange Protocol that extends the existing 3GPP user authentication architecture and reuses the standard Authentication and Key Agreement scheme.
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