Privacy preserving transactions on public blockchain

• 主要作者: Andriani, Fransisca
• 其他作者: Guo Jian
• 格式: Final Year Project
• 語言: English
• 出版: Nanyang Technological University 2019
• 主題: Science; Science::Mathematics
• 在線閱讀: https://hdl.handle.net/10356/136486
• 機構: Nanyang Technological University

The abundance of data available on public blockchain environments might expose users to privacy breaching. Ethereum as the largest host of blockchain-based project currently has no robust protection against such threats. In this paper, a proof-of-concept decentralized application is implemented demonstrating privacy preserving transaction flow in Ethereum environment using zero-knowledge cryptography (zk-SNARK ). The design of the application utilized an experimental package, EY Nightfall and focuses on a blind auction scenario where personal informations needs to be protected. The proof-of-concept is then analysed to weigh the financial and temporal costs of the implementations against the security advantages and was found to be feasible for non fast-paced settings and significantly large transactions.