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Strong Designated Verifier Signature in a Multi-user Setting
Gorantla, M.C., Boyd, C. and Nieto, J.M.G.
The security of strong designated veri er (SDV) signature schemes has thus far been analyzed only in a
two-user setting. We observe that security in a two-user setting does not necessarily imply the same in a
multi-user setting for SDV signatures. Moreover, we
show that existing security notions do not adequately
model the security of SDV signatures even in a two-user setting. We then propose revised notions of security in a multi-user setting and show that no existing
scheme satisfies these notions. A new SDV signature
scheme is then presented and proven secure under the
revised notions in the standard model. For the purpose of constructing the SDV signature scheme, we
propose a one-pass key establishment protocol in the
standard model, which is of independent interest in
itself. |
Cite as: Gorantla, M.C., Boyd, C. and Nieto, J.M.G. (2009). Strong Designated Verifier Signature in a Multi-user Setting. In Proc. Seventh Australasian Information Security Conference (AISC 2009), Wellington, New Zealand. CRPIT, 98. Brankovic, L. and Susilo, W., Eds. ACS. 21-31. |
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