ABSTRACT
The contemporary and ever-growing internet combines objects known as Things, which comprise features of actuating, networking, and sensing capabilities with dynamic control services. Such Internet of Things (IoT) technologically enabled devices are inevitable for today's modern society and can be personalized in homes, public transport, and vehicles. It is capable of addressing challenges in various application domains, including e-health, manufacturing, and infrastructure management systems. Also, the integration of cloud computing with IoT has developed the two very closely allied internet technologies with the former benefits, the latter a platform for success by providing third party access to the infrastructure. As IoT grows speedily due to these communication and computational technologies, IoT security is essential to protect hardware and networks in IoT systems. IoT technology has various security challenges in the form of trust management issues and coordinated work of systems. Blockchain (BC) technology addresses privacy and security issues in IoT and provides tamper-proof data, robustness, high reliability, and distributed file system. Thus, the objective of this chapter is to have a broader view of security issues in IoT when applied to multiple domains. We also explore the convergence of significant paradigms like BC and IoT that include security and interconnectivity to modernize things. Further, we discuss the challenges of implementing BC and its related security issues. This survey would also provide a comprehensive analysis and scope of future research implications of BC in IoT with cloud for the benefit of the research community.
