An Anonymous Protocol with User Identification and Linking Capabilities for User Privacy in a Permissioned Blockchain

【Author】 Ra, Gyeongjin; Seo, Deahee; Bhuiyan, Md Zakirul Alam; Lee, Imyeong

【Source】ELECTRONICS

【影响因子】2.690

【Abstract】A permissioned blockchain includes a user in the network after verifying the user's identity, in contrast to Bitcoin, which is a public blockchain that allows network participation without third-party approval. The two types of permissioned blockchains are private blockchains, each consisting of one server and multiple users, and consortium blockchains, which consist of groups of private blockchains. However, a blockchain has privacy issues, such as user tracking and inference. Therefore, cryptography should be applied for user privacy in a blockchain. There is a lot of research on anonymous protocols for privacy in a blockchain. In this paper, we provide a scheme for user management, i.e., identification and authorization, in a permissioned blockchain. We also propose an anonymous protocol with user identification and transaction linking capabilities provided by the private server, strictly to solve privacy concerns.

【Keywords】permissioned blockchain; privacy; pseudonym; anonymous credential system

【发表时间】2020 AUG

【收录时间】2022-01-02

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