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An Externally Auditable Identity Management System Using the Bitcoin Blockchain

Yinan Pei and Kazumasa Oida
Department of Computer Science and Engineering, Fukuoka Institute of Technology, Fukuoka, Japan
Abstract—The Personal Identity Management System (PIMS) proposed by Augot et al. is based on the approach of reducing the disclosure of personal information as much as possible by means of the zero-knowledge proof and the Bitcoin technologies. Even if these technologies are used, complete disclosure of personal information is practically impossible. This paper improves the PIMS in terms of auditability, such that the system makes on-chain histories traceable and provides possible leakage sources. The paper also discusses some ideas for reducing the Bitcoin transaction cost because the cost of writing data to the Bitcoin is expensive.
Index Terms—bitcoin blockchain, privacy, auditing, zero-knowledge proof

Cite: Yinan Pei and Kazumasa Oida, "An Externally Auditable Identity Management System Using the Bitcoin Blockchain," Vol. 9, No. 3, pp. 73-78 August 2018. doi: 10.12720/jait.9.3.73-78
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