Abstract
With the increasing popularity of online shopping, privacy concerns in E-commerce are attracting more and more attention. Existing E-commerce models are trapped in a dilemma between the proof of ownership and privacy protection. To address this issue, in this paper we design a privacy-preserving business protocol by employing private smart contracts in the negotiation phase. The protocol allows counterparties make deals without the disclosure of private information such as identities, addresses, and phone numbers. Moreover, we employ the zero-knowledge proof to guarantee the ownership. To understand the feasibility for implementing the proposed model, we also conduct extensive experiments to evaluate the performance of existing blockchain development platforms, Ethereum Quorum and SERO.
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