Decentralized Identity Authentication with Trust Distributed in Blockchain Backbone

摘要

To overcome the difficulties in the traditional password-based identity authentication procedure with high security risk and complexity, and to avoid the privacy leaking problems arising from a series of new techniques such as using biometrics as key, this paper proposes a universal solution for decentralized identity authentication by block chain integrated with a trusted execution environment, through a separate hardware to establish a secure area, enabling identity anonymity and avoiding feature disclosure. Smart contract and consensus mechanism are adopted for building trusted identity nodes between decentralized nodes by constructing a traceable identity data structure in blockchain. We conduct formal theoretical and empirical evaluations to show that the proposed can realize user identity registration, cross-platform authentication, and guarantee security in the whole procedure with efficiency and reliability.