5. An Asymmetric RSA-Based Security Approach for Opportunistic IoT

Internet of things (IoT) is a technical revolution of the internet where users, computing systems, and daily objects having sensing abilities collaborate to provide innovative services in various application domains. Opportunistic internet of things (OppIoT) is an extension of the opportunistic networks that exploits the interactions between the human-based communities and the IoT devices to increase the network connectivity and reliability. In this context, the security and privacy requirements play a crucial role as the collected information is exposed to a wide unknown audience. Traditional secure routing methods cannot be applied to OppIoT systems due to the lack of fixed path between nodes. Hence, an adaptable infrastructure is required to handle the security threats in dynamic OppIoT environment. This chapter proposes a novel security scheme for OppIoT using RSA-based asymmetric cryptography to secure the network and Markov chain to make prediction about a node’s future location and its corresponding delivery probability. Simulation results convey that the suggested approach ensures security of messages and outperforms the traditional protocols. RSASec is superior to LPFR-MC in terms of correct packet delivery by 19%, message delivery probability by 2.33%, number of messages dropped is reduced by 3.9%, and average latency is 6.76% lower than LPFR-MC.