Blockchain-Technology-Based Solutions for IOT Security

After a long period of development, blockchain innovation has received much attention from scholars and industry practitioners alike. This innovation allows the issuance of smart contracts, which are utilised to automate and execute deals amongst clients. Blockchain is also being used nowadays by a few IT applications as a specialised foundation. This technology also prevents the duplication of information similar to what is being done with Bitcoin and other cryptocurrencies. Specifically, Bitcoin records are virtually impossible to alter as this cryptocurrency is being traded amongst hundreds of thousands of servers. Therefore, to launch a successful attack, the aggressor should change the Bitcoin records of 51% of these servers simultaneously. The cost of such effort significantly exceeds the potential payoff. Meanwhile, private data that are stored on single servers, such as Amazon and Google, are prone to malicious attacks. Therefore, in this paper, we propose the use of blockchain to solve the security issues in the Internet of Things (IOT). We initially identify and categorise the prevalent security issues, particularly data privacy, being faced in IoT in expansion to conventions utilized for organizing, communication, and administration. Afterwards, we formulate some security measures for IoT and illustrate scenarios where blockchain is being used in IoT applications. © 2022 Iraqi Journal for Computer Science and Mathematics. All rights reserved.