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Erschienen in:
2010 | OriginalPaper | Buchkapitel
Provably Secure Convertible Undeniable Signatures with Unambiguity
verfasst von : Le Trieu Phong, Kaoru Kurosawa, Wakaha Ogata
Erschienen in: Security and Cryptography for Networks
Verlag: Springer Berlin Heidelberg
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This paper shows some efficient and provably-secure convertible undeniable signature schemes (with both selective conversion and all conversion), in the standard model and discrete logarithm setting. They further satisfy unambiguity, which is traditionally required for anonymous signatures. Briefly, unambiguity means that it is hard to generate a (message, signature) pair which is valid for two
different
public-keys. In other words, our schemes can be viewed as anonymous signature schemes as well as convertible undeniable signature schemes. Besides other applications, we show that such schemes are very suitable for anonymous auction.