Internet of Things (IoT) transforms network communication to Machine-to-Machine (M2M) basis and provides open access and\nnew services to citizens and companies. It extends the border of Internet and will be developed as one part of the future 5G\nnetworks. However, as the resources of IoT�s front devices are constrained, many security mechanisms are hard to be implemented\nto protect the IoT networks. Intrusion detection system (IDS) is an efficient technique that can be used to detect the attackers\nwhen cryptography is broken, and it can be used to enforce the security of IoT networks. In this article, we analyzed the intrusion\ndetection requirements of IoT networks and then proposed a uniform intrusion detection method for the vast heterogeneous IoT\nnetworks based on an automata model.The proposedmethod can detect and report the possible IoT attacks with three types: jamattack,\nfalse-attack, and reply-attack automatically.We also design an experiment to verify the proposed IDS method and examine\nthe attack of RADIUS application.
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