Cross-Chain Trusted Information Match Scheme with Privacy-Preserving and Auditability

Recently, numerous challenges concerning personal identity security along with other security issues regarding privacy have been introduced. While the blockchain offers a solution for recording personal information and facilitating matching needs, existing researches have indicated the absence of privacy and traceability. In this paper, we introduce an information matching scheme rooted in cross-chain technology. This approach employs a public blockchain for information matching and a consortium blockchain for transmitting private data. Cross-chain consensus protocols are leveraged to accomplish privacy protection and validation for cross-chain information transmission. The scheme serves the purpose of achieving information matching between two parties within the public blockchain framework. It enhances users’ identity and information privacy, while also bolstering the auditability of cross-chain information.