Avoine, GildasVaudenay, Serge2007-01-192007-01-192007-01-19200410.1007/978-3-540-27800-9_7https://infoscience.epfl.ch/handle/20.500.14299/239749WOS:0002226266000075441In 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.NCCR-MICSNCCR-MICS/CL3text::conference output::conference proceedings::conference paper