International Journal of Computer Networks and Applications (IJCNA) DOI: 10.22247/ijcna/2021/209695 Volume 8, Issue 4, July – August (2021) ISSN: 2395-0455 ©EverScience Publications 268 RESEARCH ARTICLE Blockchain-Enabled Consensus Routing Protocol Improving the Security Data Communication in Internet of Things Applications Monika Parmar Chitkara University School of Engineering and Technology, Chitkara University, Himachal Pradesh, India. monika.parmar@chitkarauniversity.edu.in Harsimran Jit Kaur Chitkara University Institute of Engineering and Technology, Chitkara University, Punjab, India. harsimran.kaur@chitkara.edu.in Received: 29 May 2021 / Revised: 01 July 2021 / Accepted: 07 July 2021 / Published: 28 August 2021 Abstract – The Internet of Things (IoT) and Blockchain distribution ledger technology as a concept is enchanting facilities and industrial developments with advanced implements in many applications. The IoT and Blockchain market is further expected to develop three times from current development by 2025. Though many IoT applications have major challenges in safest data transaction and scalability issues while increasing the number of IoT devices. Practical Byzantine Fault Tolerance (PBFT) is a widely used form of decentralized consent, however the network node's confidence in PBFT cannot be guaranteed, as well as the mechanism of reaching consensus will consume a large amount of network services. The article suggests the novel consensus process, which is referred to a Hybrid consensus blockchain algorithm and control authentication on Trust. The Internet of Things applications are integrated with a blockchain- based decentralized system that authenticates the IoT devices through distributed control authentication. This hybrid consensus blockchain method provides security for transactions and access to unauthorized devices is restricted. The PBFT algorithm using a decentralized network system using blockchain has no restriction of IoT devices. Even malicious users create the grouping into the network that has been controlled by the distributed control authentication method. Further then malicious users are rejected from the decentralized network. In this paper, we propose the Hybrid consensus blockchain and PBFT algorithm ensure the safest data transaction through blockchain technology and improves the performance of the decentralized network. Finally, we have presented a Hybrid Consensus algorithm to be utilized in the PBFT method which enables the safest data transaction. Index Terms – Byzantine Attack, Internet of Things, Blockchain, Consensus, Decentralized Control System. 1. INTRODUCTION IoT-based systems are made up of a variety of diverse wireless systems, like RFID systems, sensors, controllers, and so on. Computing and networking systems are smoothly integrated in these platforms [1]. In different areas, blockchain technology is gaining more and more interest from researchers. Since the functionality of various kinds of cryptographic techniques are largely dependent on the consensus mechanisms they implement, a comprehensive understanding of established consensus mechanisms is required. These implementations must be put through their paces, evaluated, and correlated. Numerous efforts to accomplish this goal have indeed been made, as specified in the relevant segments [2-4]. Figure 1 A Simplified Architecture of a Class of Blockchain- Based System The accompanying main frameworks for achieving consensus are Proof-of-Work (PoW) and Proof-of-Memory (PoM) that are used in existing algorithms but for data transaction in between the nodes, routing protocol plays an important role that further have effect on system throughput, bandwidth utilization, energy consumption, overhead latency. A simplified architecture of blockchain based systems is