Anonymous Access System with Limited Number of Uses in a Trustless Environment

【Author】 Garcia-Grau, Francesc; Herrera-Joancomarti, Jordi; Josa, Aleix Dorca

【Source】APPLIED SCIENCES-BASEL

【影响因子】2.838

【Abstract】This article proposes a novel method for managing usage counters within an anonymous credential system, addressing the limitation of traditional anonymous credentials in tracking repeated use. The method takes advantage of blockchain technology through Smart Contracts deployed on the Ethereum network to enforce a predetermined maximum number of uses for a given credential. Users retain control over increments by providing zero-knowledge proofs (ZKPs) demonstrating private key possession and agreement on the increment value. This approach prevents replay attacks and ensures transparency and security. A prototype implementation on a private Ethereum blockchain demonstrates the feasibility and efficiency of the proposed method, paving the way for its potential deployment in real-world applications requiring both anonymity and usage tracking.

【Keywords】attribute-based credentials; pseudonyms; privacy-preserving credentials; self-blinded scheme; security proofs; user-centred system; zero knowledge proofs; trust-less; access counter

【发表时间】2024 OCT

【收录时间】2024-11-04

【文献类型】理论模型

【主题类别】

区块链技术-协同技术-隐私保护