Cryptology ePrint Archive: Report 2017/377

Privacy-Preserving Multi-Party Bartering Secure Against Active Adversaries

Stefan Wüller and Ulrike Meyer and Susanne Wetzel

Abstract: A majority of electronic bartering transactions is carried out via online platforms. Typically, these platforms require users to disclose sensitive information about their trade capabilities which might restrict their room for negotiation. It is in this context that we propose a novel decentralized and privacy-preserving bartering protocol for multiple parties that offers the same privacy guarantees as provided by traditional bartering and by cash payments. The proposed protocol is even secure against an active attacker who controls a majority of colluding parties.

Category / Keywords: cryptographic protocols /

Date: received 28 Apr 2017

Contact author: stefan wueller at rwth-aachen de

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Version: 20170501:134425 (All versions of this report)

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