Paper 2005/238

Simple and Provable Secure Strong Designated Verifier Signature Schemes

Raylin Tso, Takeshi Okamoto, and Eiji Okamoto

Abstract

In this paper, we introduce a simple strong-designated verifier signature (SDVS) scheme which is much more efficient than previously proposed SDVS schemes. In addition, with only one more parameter published by the signer, this scheme can provide signer's forward security. That is, the consistency of a signature cannot be verified by any third party even if he/she knows a signer's private key. Thus the privacy of a signer's identity is protected independently in each signature, if the designated verifier's private key has not been disclosed. In addition, this scheme can be easily modified to a designated verifier signcryption scheme with virtually no additional cost. We will also show that the proposed scheme is provably secure in the random oracle model.

Metadata
Available format(s)
-- withdrawn --
Category
Cryptographic protocols
Publication info
Published elsewhere. Unknown where it was published
Keywords
signatureanonymity.
Contact author(s)
raylin @ cipher risk tsukuba ac jp
History
2005-09-25: withdrawn
2005-07-30: received
See all versions
Short URL
https://ia.cr/2005/238
License
Creative Commons Attribution
CC BY
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