D2CDIM:DID-Based Decentralized Cross-Domain Identity Management with Privacy-Preservation and Sybil-Resistance

【Author】 Xiong, Yi; Yao, Shixiong; Li, Pei

【Source】EMERGING INFORMATION SECURITY AND APPLICATIONS, EISA 2022

【影响因子】

【Abstract】Most of the current decentralized cross-domain identity management frameworks are based on blockchain. In these schemes, the identity providers (IDPs) in different trust domains connect through blockchain technology. However, a single IDP in the domain is still at the risk of being compromised or corrupted. What's more, users may create redundant identities for different services but can not dominate all their identities completely. Therefore, we propose a cross-domain identity management system based on the concept of the Decentralized Identifier standard. It provides full ownership and management of identity for users. In order to reduce the burden of private key management caused by redundant identities, we present a deduplication scheme to limit the number of one user's DIDs. It can also resist the Sybil attack by real-life identity credential. Besides that, we improve the authentication efficiency by dynamic accumulator and preserve the identity privacy by the anonymous credential and zero knowledge in the cross-domain authentication scheme.

【Keywords】Cross-domain; Decentralized identifier; Privacy protection; Sybil-resistance

【发表时间】2022

【收录时间】2023-05-31

【文献类型】理论模型

【主题类别】

区块链应用-虚拟经济-虚拟身份