A Summary of Security Techniques-Based Blockchain in IoV

Table 1

Comparison of architecture of BIoV.

Classification of models	Literature	Key technologies used in the model	Strengths/weaknesses
Entity-centric model	[10]	Blockchain	RSU acts as a blockchain node, but the scale and deployment issues of nodes are not resolved
	[11]	Cloud computing and double-chain structure
	[12]	SDN, fog computing, and blockchain	The problem of coordination between nodes has not been solved
	[13]	Blockchain, deep learning, and spatial crowdsourcing	The performance of the blockchain is improved, but the computing power and throughput performance requirements are increased
A model centered on the data life cycle	[2, 16]	The communication layer, the computing layer, and the application layer are integrated with the blockchain technology	Integrate data and blockchain to varying degrees, but the management and performance of the system bring great challenges
	[17]	Blockchain is incorporated into every layer of the model
	[18]	Five types of data correspond to five subchains