Abstract
The presence of malicious nodes poses significant challenges to the robustness and security of blockchain cross-chain systems. This study investigates the interaction mechanism of blockchain cross-chain systems by integrating relay committee and trust models, aiming to mitigate the detrimental effects caused by malicious nodes on the overall system. Firstly, introducing a relay committee is proposed to facilitate the establishment of reliable relay nodes that serve as intermediaries connecting diverse blockchain networks. Secondly, the study devises a trust model, leveraging nodes’ past behaviors to evaluate their trustworthiness and identify and isolate potentially malicious nodes. Lastly, a mutual verification decentralized identifier (MVDID) enforces access control for inter-blockchain objects. In the experimental phase, the proportion of trusted nodes to the total number of nodes ranges from 0.1 to 0.3, yielding a consistently high transaction success rate between 97% and 100%. The findings indicate that implementing a relay committee enhances cross-chain operations’ efficiency and security. Additionally, the trust model aids in accurately identifying malicious nodes while promoting system transparency and collaboration. Consequently, this mechanism offers a comprehensive enhancement in performance and security for blockchain cross-chain systems.
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