Research on Cross-Chain Consensus Models in Complex Trust Environments

With the application of blockchain technology in the fields of energy big data, government affairs and data sharing, the types of blockchain adapted to various scenarios have gradually flourished, and the ledgers operate in isolation from each other, forming data silos and causing challenges for interchain data access and consistent collaboration. Most of the current cross-chain mechanisms based on blockchain are notary mode and relay mode, which cannot be dynamically switched according to their respective organizations' trust degree, making it difficult to meet the requirements of cross-chain data access between blockchain systems in complex trust environments. Based on this issue, a cross-chain consensus model based on trust establishment is proposed. The scheme constructs a blockchain security trust model based on the network state, blockchain system security, node data consistency and malicious node rate during blockchain operations, combines fuzzy theory and probability distributions to determine the trust components of each system, and uses those trust components and their weights to determine the system's trust value. The cross-chain consensus scheme is designed based on this model, which can be flexibly switched between the notary model and the committee relay model to satisfy cross-chain interconnection and mutual access between systems with different trust relationships. The simulation results show that the proposed model and scheme have good performance in terms of stability and performance.