An Integrated Blockchain Approach to Model Secure Internet of Things based Systems

Internet of Things (IoT) made a tremendous change in the field of automation technologies. Objects or Things in the real world can be converted into a `smart object' by attaching some sensors or actuators. These devices are capable of communicating each other using internet. Light weight protocols make the IoT system more user friendly. But one of the critical challenges faced by any IoT designer is to provide the data security for IoT applications. Though the `things' are connected to a network, there is a high chance of data stealing or data manipulation. Block chain can be used to ensure data security, scalability and reliability of IoT applications. We propose a secure blockchain based IoT architecture to assure data security. Blockchain is utilized for tracking and coordinating millions of connected components. Blockchain uses decentralized approach which can prevent from single points of failures thereby creates a stable interoperable secure system. Cryptographic algorithms can be used for securing the sensor data. Thus, our model enhances not only security but also the privacy concerns of an end user.