A Reputation-Based Approach Using Consortium Blockchain for Cyber Threat Intelligence Sharing

Table 2

Comparisons between related works about CTI sharing.

Study	Consensus	Contributions and shortcomings
Huang et al. [33]	—	Use the blockchain to address the contradiction between the privacy protection requirements of CTI sharing and the need to build a complete attack chain, but not consider the transmission performance of the CTI sharing and exchange in this study.
Homan et al. [9]	Solo	Use the blockchain to allow trusted parties to disseminate highly sensitive data privately. But solo consensus can only be used in the test environment, which is not suitable for a realistic network.
Li et al. [36]	Proof-of-concept	Use blockchain to verify trust management and alert aggregation in a challenge-based trust mechanism. But the proof-of-concept chain is used in this approach to investigate the performance rather than the real blockchain.
Yanugunti and Yau [37]	PBFT	Use blockchain to improve the accuracy of intelligence by identifying compromised nodes in the CIDN. But this study employs the PBFT algorithm to reach a consensus that transmission performance will be affected.