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Further Observations on Optimistic Fair Exchange Protocols in the Multi-user Setting

Conference Paper


Abstract


  • 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.

UOW Authors


  •   Huang, Xinyi (external author)
  •   Mu, Yi (external author)
  •   Susilo, Willy
  •   Wu, Wei (external author)
  •   Xiang, Yang (external author)

Publication Date


  • 2010

Citation


  • Huang, X., Mu, Y., Susilo, W., Wu, W. & Xiang, Y. (2010). Further Observations on Optimistic Fair Exchange Protocols in the Multi-user Setting. In P. Nguyen & D. Pointcheval (Eds.), International Workshop on Practice and Theory in Public Key Cryptography (pp. 124-141). Germany: Springer.

Scopus Eid


  • 2-s2.0-79955537243

Ro Metadata Url


  • http://ro.uow.edu.au/infopapers/3558

Start Page


  • 124

End Page


  • 141

Abstract


  • 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.

UOW Authors


  •   Huang, Xinyi (external author)
  •   Mu, Yi (external author)
  •   Susilo, Willy
  •   Wu, Wei (external author)
  •   Xiang, Yang (external author)

Publication Date


  • 2010

Citation


  • Huang, X., Mu, Y., Susilo, W., Wu, W. & Xiang, Y. (2010). Further Observations on Optimistic Fair Exchange Protocols in the Multi-user Setting. In P. Nguyen & D. Pointcheval (Eds.), International Workshop on Practice and Theory in Public Key Cryptography (pp. 124-141). Germany: Springer.

Scopus Eid


  • 2-s2.0-79955537243

Ro Metadata Url


  • http://ro.uow.edu.au/infopapers/3558

Start Page


  • 124

End Page


  • 141