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Linkable Spontaneous Anonymous Group Signature for Ad Hoc Groups
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Abstract: | We present a linkable spontaneously anonymous group (LSAG) signature scheme (alternatively known as linkable ring signature scheme) satisfying the following three properties. (1) Anonymity, or signer indistinguishability. (2) Linkability: That two signatures by the same signer can be linked. (3) Spontaneity: No group secret, therefore no group manager or group secret sharing setup. We reduce the security of our scheme to well-known problems under the random oracle model. Using the scheme, we construct a new efficient one-round e-voting system which does not have a registration phase. We also present a new efficient reduction of famous rewind simulation lemma which only relies on elementary probability theory. Threshold extensions of our scheme are also presented. |
BibTeX
@misc{eprint-2004-12003, title={Linkable Spontaneous Anonymous Group Signature for Ad Hoc Groups}, booktitle={IACR Eprint archive}, keywords={Linkable, Signature}, url={http://eprint.iacr.org/2004/027}, note={To appear ACISP 2004. ksliu9@ie.cuhk.edu.hk 12539 received 2 Feb 2004, last revised 1 May 2004}, author={Joseph K. Liu and Victor K. Wei and Duncan S. Wong}, year=2004 }