Further observations on optimistic fair exchange protocols in the multi-user setting
Contribuinte(s) |
Nguyen, Phong Q. Pointcheval, David |
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Data(s) |
01/01/2010
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Resumo |
Recent research has shown that the single-user security of optimistic fair exchange cannot guarantee the multi-user security. This paper investigates the conditions under which the security of optimistic fair exchange in the single-user setting is preserved in the multi-user setting. We first introduce and define a property called “Strong Resolution-Ambiguity”. Then we prove that in the certified-key model, an optimistic fair exchange protocol is secure in the multi-user setting if it is secure in the single-user setting and has the property of strong resolution-ambiguity. Finally we provide a new construction of optimistic fair exchange with strong resolution-ambiguity. The new protocol is setup-free, stand-alone and multi-user secure without random oracles.<br /> |
Identificador | |
Idioma(s) |
eng |
Publicador |
Springer |
Relação |
http://dro.deakin.edu.au/eserv/DU:30034382/xiang-furtherobservations-evid-2010.pdf http://dro.deakin.edu.au/eserv/DU:30034382/xiang-furtherobservationsonoptimistic-2010.pdf |
Direitos |
2010, Springer |
Tipo |
Conference Paper |