关键词: 可信数字身份, 分布式身份, 数字身份钱包, 网络监管, 身份信息安全

Abstract: Digital identity is the mapping of real identity of natural person in cyberspace. Traditional digital identities are centrally managed and controlled. With the improvement of people’s privacy protection awareness, these digital identities no longer meet the requirements. This paper first expounds the development status and trends of digital identity at home and abroad, analyzes the application requirements of digital identity, and illustrates the possibility of the development of our national digital identity construction to a decentralized model. Secondly, the technical and security aspects of decentralized identity are thoroughly examined based on the investigation and research of digital identity application scenarios in some nations. Among them, technical aspect focuses on the infrastructure and technical models for realizing decentralized digital identity, including Decentralized Identifiers (DIDs), Verifiable Credential (VC), and digital identity wallets, etc. and security aspect focuses on the verification, authentication, and federation process of digital identities in each case. Finally, this paper concludes by outlining the challenges facing the current digital identity construction in China, and offering suggestions for building a decentralized digital identity according with Chinese situation.

Key words: trusted digital identity, decentralized identity, digital identity wallet, network regulation, identity information security