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Routing Protocol for Low-Power and Lossy Networks (RPL) has been used in the Internet of Things (IoT) with Wireless Sensor Networks (WSNs), but it is does not give much focus to protect against routing attacks. Therefore, it is possible for an attacker to utilize the RPL routing system as an initial platform for devastating and crippling attacks on an IoT network. In IoT based networks, RPL provides a minimal level of protection against a wide variety of attacks, which are unique to RPL and are launched in WSNs. Moreover, the traditional Internet and routing security solutions also have memory, processing, and resource limitations that make them ineffective for IoT devices. Several mitigation schemes, such as those based on rule-based learning algorithms, Intrusion Detection Systems (IDSs), and trust computation and management techniques were proposed in the past to improve the safety of IoT networks and …