A Summary of Security Techniques-Based Blockchain in IoV

Table 3

Comparison of privacy protection.

Literature	Object	Method	Superiority
[41]	Content	Cognitive engine	Flexible short response time
[42]	Content	Software-defined networking, deep reinforcement, and learning spatial crowdsourcing	High throughput and low overhead
[43]	Identity	Remote authentication model	Trace
[44]	Identity	Conditional privacy statement protocol	Trust management method preventing forged messages
[45]	Location	Trust management method based on Dirichlet distribution	Detection of malicious vehicles
[46]	Location	Construction of trusted stealth region based on trust mechanism	Limited computing time and communication costs
[38]	Identity	Cluster-based MAC authentication protocol (ACB-MAC)	High throughput and lower latency