Abstract
The recent development in mobile computing resulted in widespread application of Internet of Things (IoT). IoT promises a world where smart and intelligent communication from most of the devices is possible through Internet anywhere, anytime with least possible human assistance. However, security and privacy are major concerns of IoT which could affect its sustainable development. In this work, we have dealt with IoT security from two main perspectives that are IoT architecture and protocols. We discuss different layers in IoT architecture and investigated the security concerns associated with different IoT layers along with their possible solutions. We have reviewed various protocols in IoT layered architecture and the security mechanism developed for each protocol. Also, we provide certain future directions of possible research for IoT security.
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