A Secure and Efficient Cross-Chain Model Based on Credentials

With the growth of business interaction requirements, the limitations caused by blockchain isolation are becoming more and more obviously, and cross-chain technology is the main method to address this issue. However, due to independent construction in the early stage, it is now difficult for blockchain systems to interact directly in terms of technology and security. The relay chain technology can circumvent some technical differences and has become one of the popular cross-chain solutions, but its construction complexity, cross-chain efficiency, and privacy protection still need to be improved. For this reason, we propose a credential-based cross-chain model, which can effectively reduce the difficulty of transaction processing implementation and improve cross-chain efficiency. In this model, we design a couple of credentials as the trust anchor between different blockchains, and transmit transaction proof and business data in separate paths, avoiding the security risks faced by current relay chain solution. The experimental evaluation shows that the proposed model has better performance compared to the traditional relay mode.