Distributed collaborative certificate issuance and validation method based on chain of trust

Aiming at the problems of uneven levels of electronic authentication service capabilities and the difficulty of mutual recognition of digital certificates across industries, regions and businesses, this paper proposes a distributed collaborative certificate issuance and verification method based on the chain of trust. First, through an in-depth analysis of the problems of electronic authentication services, the goal of cross-domain trust management is proposed, and a cross-trust domain certificate mutual recognition model is designed; second, a comprehensive evaluation index of the certificate center is introduced, and a consensus mechanism based on the chain of trust is constructed; then, a collaborative certificate issuance and validation method based on the chain of trust is designed to effectively realize cross-domain certificate validation. Finally, the validation of the practical application of cross-domain collaborative certificates in electric power system proves the scientificity and reasonableness of the model and method proposed in this paper.