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Strong Anonymous Signature

Rui ZHANG, Hideki IMAI

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Summary :

The notion of anonymous signatures has recently been formalized by [18], which captures an interesting property that a digital signature can sometimes hide the identity of the signer, if the message is hidden from the verifier. However, in many practical applications, e.g., an anonymous paper review system mentioned in [18], the message for anonymous authentication is actually known to the verifier. This implies that the effectiveness of previous anonymous signatures may be unjustified in these applications. In this paper, we extend the previous models, and develop a related primitive called strong anonymous signatures. For strong anonymous signatures, the identity of the signer remains secret even if the challenge message is chosen by an adversary. We then demonstrate some efficient constructions and prove their security in our model.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E92-A No.10 pp.2487-2491
Publication Date
2009/10/01
Publicized
Online ISSN
1745-1337
DOI
10.1587/transfun.E92.A.2487
Type of Manuscript
Special Section LETTER (Special Section on Information Theory and Its Applications)
Category
Cryptography and Information Security

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