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Erschienen in:
2009 | OriginalPaper | Buchkapitel
Very-Efficient Anonymous Password-Authenticated Key Exchange and Its Extensions
verfasst von : SeongHan Shin, Kazukuni Kobara, Hideki Imai
Erschienen in: Applied Algebra, Algebraic Algorithms and Error-Correcting Codes
Verlag: Springer Berlin Heidelberg
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An anonymous password-authenticated key exchange (anonymous PAKE) protocol is designed to provide both password-only authentication and user anonymity. In this paper, we propose a
very-efficient
anonymous PAKE (called,
VEAP
) protocol that provides the most efficiency among their kinds in terms of computation and communication costs. The
VEAP
protocol guarantees semantic security of session keys in the random oracle model under the chosen target CDH problem, and unconditional user anonymity against a semi-honest server. If the pre-computation is allowed, the computation cost of the
VEAP
protocol is the same as the well-known Diffie-Hellman protocol! In addition, we extend the
VEAP
protocol in two ways.