Techniques to Implement Blockchain in Internet of Medical Things (IoMT)

The large amount of data that is generated through the sensors and used in the health care system with the help of Internet of Medical Things (IoMT) technology is highly sensitive and is facing a lot of security issues to maintain its integrity and privacy. Looking into the risk and security issues associated with IoMT researchers are concentrating in developing techniques to implement blockchain concepts at different layers of IoMT technology. IoMT till now has been working on centralized data whereas blockchain works on decentralized data. With the difference in technology implementation of blockchain in IoMT is quite challenging and has limitations. We present in this chapter the various reasons for implementation of blockchain in IOMT, the architecture of IoMT with the blockchain concepts, various limitation of the implementation and the future work. In order to implement blockchain in IoMT various methods are used. In this paper a complete classification of various methods based on the utilization to handle various issues like data security, privacy, interoperability, identity management, smart contract execution, consensus, integration etc. is done. Amongst all the methods four major methods are identified namely Ethereum-Based Contributions, Modified Consensus Protocol, Modified Cryptographic Technique and Hyperledger-Based Contributions. A review of all the methods of the above-mentioned techniques is done along with a complete description on how these methods are implemented. In this chapter a complete comparative analysis has been done method wise to show their contribution of security enhancement by blockchain technology in IoMT.