Optimistic Fair Exchange Based on Publicly Verifiable Secret Sharing

Abstract. In this paper we propose an optimistic two-party fair exchange protocol which does not rely on a centralized trusted third party. Instead, the fairness of the protocol relies on the honesty of part of the neighbor participants. This new concept, which is based on a generic verifiable secret sharing scheme, is particularly relevant in networks where centralized authority can neither be used on-line nor off-line.

• Type: Conference
• Year: 2004
• Where: ACISP
• Authors: Gildas Avoine, Serge Vaudenay
• Keywords: ACISP 2004, Neighbor Participants, Security Privacy, Two-party Fair Exchange, Verifiable Secret Sharing