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S. no. | Reference | Year | Technology used | Summary of the work | Shortcoming of the work | Possible solution | Implementation remarks |
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1. | [86] | 2018 | (a) Cloud, (b) blockchain | A decentralized framework to manage the healthcare data based on the cloud-enabled blockchain system | Only the prototype model is discussed. | Private blockchain-enabled cryptographic protocol is one of the possible solutions | Only the theoretical study of the proposed solution |
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2. | [87] | 2019 | (a) IPFS, (b) blockchain, (c) Solidity | Off-chain storage mechanism and role-based access policy scheme for the electronic health records based on the blockchain | Deep analysis of cryptographic primitives behind the role-based access policy scheme is required | Cipher-text attributed-based encryption scheme can be used | Solution increases the scalability of the system |
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3. | [84] | 2020 | (a) IoMT, (b) blockchain | A decentralized blockchain-enabled prototype model to combat by using the Internet-of-medical-things devices (IoMT) | Simulation of the proposed solution is not addressed | Cryptography primitives and smart contracts can be used to achieve more security in the IoMT application | Smart contract languages such as Solidity or Golang with security validation tools can be used |
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4. | [85] | 2020 | (a) IoMT, (b) blockchain, (c) attributed-based encryption and signature scheme | A framework for the medical data-sharing based on the blockchain and cloud servers | The protocol mostly depends on the third party for its operations | A distributed storage system such as swarm and IPFS can be used to achieve the full decentralization | The protocol is not analyzed formally. The security validation tools, i.e., AVISPA and Scyther do this |
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5. | [88] | 2020 | (a) IoMT, (b) blockchain, (c) cloud server | Blockchain-enabled authentication and key-agreement protocol for IoMT | Cloud server storage cost may be increased | Off-line storage scheme can be used for reducing the storage cost | Protocol simulation confirms that the computation cost is , and communication cost is |
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6. | [89] | 2021 | IoMT, (b) blockchain, (c) edge computing | Blockchain-enabled optimization and priority assignment model for medical data exchange | Did not investigate the analysis of medical data used in real scenario | Possible machine learning and deep learning algorithm can be used for proper analysis of medical data | EMOTIV EPOC used for simulating the EEG data |
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