Blockchain-Based Internet of Things and Industrial IoT: A Comprehensive Survey

Table 4

Comparison table based on different parameters of the existing IoT-enabled industrial sectors (cont…).

S. no.	Reference	Year	Technology used	Summary of the work	Shortcoming of the work	Possible solution	Implementation remarks
6.	[68]	2020	(a) IoT, (b) Ethereum blockchain, (c) Web3API	Integration of blockchain and IoT for food supply chain traceability	All the data are stored on blockchain; therefore the load on the Ethereum node can be increased.	IPFS-enabled solutions can be used to achieve the full decentralization	External blockchain test network with the integration of IPFS module can be used
7.	[69]	2020	(a) IoT, (b) blockchain, (c) cloud center	Integration of blockchain and IoT to develop a smart agriculture system	The authors do not present the required security protocols to develop the smart agriculture system.	Cryptographic primitives can be used to develop the security protocols	Smart contracts can be designed to automate the agriculture system
8.	[70]	2021	(a) IoD, (b) blockchain, (c) cloud center, (d) ground station server	An access control protocol for detection of malicious unmanned aerial vehicles in IoD environment	All the transactions are stored in the peer-to-peer cloud servers which maintain the blockchain. Therefore, full decentralization was not achieved by this solution.	Off-chain storage mechanism can be used to provide the full decentralization	AVISPA tool utilized by the authors for the validation of security protocols
9.	[71]	2021	(a) IoT, (b) blockchain, (c) smart grid	A framework that combines the IoT and blockchain to provide an access control mechanism for the smart grid	Most of the sensitive data is stored on the blockchain. Therefore storage cost may be increased.	Various off-chain storage mechanisms can be used, which solve the storage problem of blockchain network	Experimental results shows that the computational cost of service providers is , and communication cost is