SCTIM: A Trusted Identity Model Based On Smart Contract

Abstract

The anonymity of blockchain identities brings security risks to transactions. To solve this problem, this paper proposes a trusted identity model based on smart contracts and introduces the CA certificate of the PKI system to endorse the authenticity of the user's identity. The model structure is designed, the blockchain digital certificate format is given, the cross-domain authentication scheme based on smart contracts is described, and the security and efficiency of the model are analyzed. In terms of security, the model meets the needs of entity verification; in terms of efficiency, the use of a hash algorithm to construct a complete certificate chain, compared with existing solutions, significantly improves the efficiency of cross-domain authentication.