Building a Privacy-Preserving Blockchain-Based Bidding System: A Crypto Approach

Hsuan Hao Chen, Po Wen Chi*, Yun Hsin Chuang

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

摘要

Blockchain-based bidding systems are becoming increasingly popular nowadays. Due to the properties of blockchain, bidding records are unchangeable. With existing encryption techniques, these bidding records can only be shared by the bidder and the seller. Although this scenario sounds secure, it does not consider a coercion case. A powerful coercer may force the bidding system to open the records stored on the blockchain, and the system loses privacy. To solve this problem, in this paper, we introduce a new encryption scheme called deniable matchmaking encryption (DME). This new encryption scheme provides deniability not only for the message, but also for the identities. We use the chameleon hash function to make fake message and fake identities indistinguishable from the real message and the real identities. Therefore, the bidding system can use fake information to answer the coercer, and user privacy is kept by the blockchain-based bidding system.

原文英語
頁(從 - 到)13367-13378
頁數12
期刊IEEE Access
10
DOIs
出版狀態已發佈 - 2022

ASJC Scopus subject areas

  • 電腦科學(全部)
  • 材料科學(全部)
  • 工程 (全部)

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