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CRYPTO
1989
Springer

Undeniable Signatures

12 years 4 months ago
Undeniable Signatures
Abstract. In this paper, we provide a new approach to study undeniable signatures by translating secure digital signatures to secure undeniable signatures so that the existing algorithms can be used. Our mechanism is that any verifier without trapdoor information cannot distinguish whether a message is encoded from Diffie-Hellamn resource D or random resource R while a signer with trapdoor information can distinguish efficiently a codeword which is computed from D or R. We show how our mechanism can be efficiently achieved and provide proofs of security for our schemes in the standard complexity model. We also provide evidences to show that our approach can be applied to construct designated confirmer signatures, designated verifier signatures as well.
David Chaum, Hans Van Antwerpen
Added 10 Aug 2010
Updated 10 Aug 2010
Type Conference
Year 1989
Where CRYPTO
Authors David Chaum, Hans Van Antwerpen
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