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Wireless sensor networks offer inexpensive solutions in a wide variety of applications ranging from health, home, roads and public area monitoring to industry and aircraft control. As sensors proliferate, scalable communication protocols with low implementation requirements are pursued. Another key issue for the wider deployment of these solutions is security since the wireless sensor networks themselves are prone to security attacks. In this paper, we review geographical routing protocols, which allow for high scalability due to their localised operation while they also support mobility consuming less node and network resources since they operate on very limited overhead. We also investigate their vulnerabilities to security attacks (Sybil and selective forwarding attacks) and report efficient coutermeasures. [ABSTRACT FROM PUBLISHER]

Recently, Routing Protocol for Low Power and Lossy Networks (RPL) has been proposed by IETF ROLL WG in order to cope with Low Power and Lossy Networks (LLN) requirements implied by different application domains. In this paper, we present RPL modeling in J-Sim simulation environment, providing a complete simulation framework for performance evaluation as well as experimentation on open issues, such as the support of multiple instances and the definition of routing strategies based on the composition of several metrics. [ABSTRACT FROM PUBLISHER]