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.
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Liu, J.K., Wei, V.K., Wong, D.S. (2004). Linkable Spontaneous Anonymous Group Signature for Ad Hoc Groups. In: Wang, H., Pieprzyk, J., Varadharajan, V. (eds) Information Security and Privacy. ACISP 2004. Lecture Notes in Computer Science, vol 3108. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-27800-9_28
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DOI: https://doi.org/10.1007/978-3-540-27800-9_28
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