An efficient identity tracing scheme for blockchain-based systems

【Author】 Li, Peili; Xu, Haixia; Ma, Tianjun

【Source】INFORMATION SCIENCES

【影响因子】8.233

【Abstract】The enhancement of anonymity for blockchain users received much attention. However, in some cases tracing user's identity is also very important, especially to expose illegal transactions. In this paper, we propose an identity tracing scheme and implement it using a simple and efficient proof method. In particular, we design a new signature scheme that is used to generate a user's certificate, and present a binding method for the user's certificate and trading public key. Users only need to register once with the supervision center, and then the center may trace sender's identity of the transactions on the blockchain. Our scheme is suitable to blockchain-based systems that explicitly use public/private key pairs, and does not affect the anonymity property of the original system. (c) 2021 Elsevier Inc. All rights reserved. Blockchain is the core technology of digital currencies, e.g. the Bitcoin system [21], and has received extensive attention from academy and industry. Blockchain is a decentralized ledger technology that solves the trust problem in a multi-center environment. The trust problem is how do the nodes that do not trust each other reach a consensus without a trusted third party. Taking Bitcoin as an example, the transactions need to be verified and recorded in a distributed environment. By using blockchain technology, users can finally reach a consensus on the ledger. Blocks of transactions are created when parties exchange coins, and one block occurs approximately every 10 min [9,12]. All the blocks are linked (see Fig. 1), and by using public/private key pairs, only Bitcoin owners can transfer their coins, while the authenticity of the transactions may be verified by anyone. Blockchain technology has been initially used in the financial field. However, more recent developments have shown that

【Keywords】Blockchain; Anonymity; Supervision; Traceability; Certificate

【发表时间】2021 JUN

【收录时间】2022-01-02

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