Enhancing Cross-Domain Access Efficiency in Zero-Trust Scenarios Oriented to the Access Process

During cross-domain access, both communication ends need zero-trust evaluation by the trust assessment node and policy matching for permission. Nodes handling these may face concurrent computing and policy search tasks that need to be performed. We propose a new method to enhance security and efficiency. By introducing a trust hash value from access-end features and optimizing the policy tree, along with a better trust calc method, experiments show improved cross-domain access efficiency and accuracy, offering a new view for power grid services.