Secure Data Transaction and Data Analysis of IoT Devices Using Blockchain

The Internet of Things (IoT) is a network formed by electronic objects having embedded sensors, software and network connectivity in them. Although they can collect and exchange data, they are prone to both cyber-attack and physical tampering. Thus, it is essential to encrypt their communications, by addressing new challenges such as impersonating "things" or nodes, denial-of-sleep attacks that drain batteries, to denial-of-service attacks (DoS). A peer-to-peer model can eliminate the dependency of a centralized data center. A Blockchain is a model for a distributed database of records of all transactions or digital events that have been executed and shared among participating nodes. In it, digital signatures are validated instead of physical signatures. With a decentralized approach implemented with cryptographic algorithms, blockchain oversees a secure transaction between IoT devices and coordinates them. This paper explores one of the processes of incorporating blockchain with a very vulnerable centralized IoT structure. IoT devices are represented as aircrafts in which the engine data and various data from the aircrafts' sensors are sent to the airports for analysis. After analysis, the analyzed data is sent to nearby airports and also to that particular aircraft. The paper analyzes how the blockchain network is created, the time latency of sending the data of the IoT devices through this blockchain network and some parts of the analysis process which is required for aircraft maintenance.