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Journal of Zhejiang University SCIENCE C 1998 Vol.-1 No.-1 P.

http://doi.org/10.1631/FITEE.2200505


Securing multi-chain consensus against diverse miner behavior attacks in blockchain networks


Author(s):  Wenbo ZHANG, Tao WANG, Chaoyang ZHANG, Jingyu FENG

Affiliation(s):  School of Cyberspace Security, Xi’ more

Corresponding email(s):   zhangwenbo@xupt.edu.cn, fengjy@xupt.edu.cn

Key Words:  Blockchain, Cross-chain, Trust mechanism, Multi-chain consensus


Wenbo ZHANG, Tao WANG, Chaoyang ZHANG, Jingyu FENG. Securing multi-chain consensus against diverse miner behavior attacks in blockchain networks[J]. Frontiers of Information Technology & Electronic Engineering, 1998, -1(-1): .

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Abstract: 
As cross-chain technologies enable interactions among different blockchains (hereinafter "chains"), multi-chain consensus is becoming increasingly important in blockchain networks. However, more attention has been paid to single-chain consensus schemes. multi-chain consensus schemes with trusted miner participation have not been considered, thus offering opportunities for malicious users to launch diverse miner behavior (DMB) attacks on different chains. DMB attackers can be friendly in the consensus process on some chains, called mask chains, to enhance their trust value, while on others, called kill chains, they engage in destructive behavior on the network. In this paper, we propose a multi-chain consensus scheme named Proof-of-DiscTrust (PoDT) to defend against DMB attacks. The distinctive trust idea (DiscTrust) is introduced to evaluate the trust value of each user across different chains. The trustworthiness of a user is split into local and global trust values. A dynamic behavior prediction scheme is designed to enforce DiscTrust to prevent an intensive DMB attacker from maintaining strong trust by alternately creating true or false blocks on the kill chain. Based on this, three trusted miner selection algorithms for multi-chains can be implemented to select network miners, chain miners, and chain miner leaders, respectively. Experimental results show that PoDT is secure against DMB attacks and more effective than traditional consensus schemes in multi-chain environments.

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