A Multiple Indicator Credit Ranking Scheme Based on Notary Mechanism

Blockchain has penetrated multiple fields such as finance, healthcare, supply chain, and intelligent transportation. However, the value exchange between different independent blockchain systems limits the expansion of blockchain. Cross-chain technology can achieve the transfer of digital assets between blockchain networks, and the notary mechanism is a typical cross-chain technology that can achieve value exchange between different blockchains. However, it requires trust in specific notaries. To address these issues, this paper proposes a multi-indicator credit ranking scheme based on notaries to improve the reliability of notaries and ensure the security of value exchange between different blockchains. To tackle the problem of single and incomplete inherent value evaluation indicators in traditional notary mechanisms, a multi-indicator evaluation is adopted to ensure the fairness of notary node credit evaluation. To address the issue of inaccurate comprehensive credit evaluation of notaries, a comprehensive evaluation and ranking of notary nodes are conducted based on their historical transaction information to improve the accuracy of their credit evaluation. The experimental results show that using multiple indicators to evaluate the inherent value of notary nodes can comprehensively evaluate the scheme and accurately screen out high-credit nodes to act as notaries, improving the security of cross-chain asset transactions.