Welcome to the resource topic for 2004/281
Title:
Short Linkable Ring Signatures for E-Voting, E-Cash and Attestation
Authors: Patrick P. Tsang, Victor K. Wei
Abstract:A ring signature scheme can be viewed as a group signature scheme
with no anonymity revocation and with simple group setup. A
\emph{linkable} ring signature (LRS) scheme additionally allows
anyone to determine if two ring signatures have been signed by the
same group member. Recently, Dodis et al. \cite{DKNS04} gave a
short (constant-sized) ring signature scheme. We extend it to the
first short LRS scheme, and reduce its security to a new hardness
assumption, the Link Decisional RSA (LD-RSA) Assumption. We also
extend \cite{DKNS04}'s other schemes to a generic LRS scheme and a
generic linkable group signature scheme. We discuss three
applications of our schemes. Kiayias and Yung \cite{KY04}
constructed the first e-voting scheme which simultaneously
achieves efficient tallying, public verifiability, and write-in
capability for a typical voter distribution under which only a
small portion writes in. We construct an e-voting scheme based on
our short LRS scheme which achieves the same even for all
worst-case voter distribution. Direct Anonymous Attestation (DAA)
\cite{BCC04} is essentially a ring signature scheme with certain
linking properties that can be naturally implemented using LRS
schemes. The construction of an offline anonymous e-cash scheme
using LRS schemes is also discussed.
ePrint: https://eprint.iacr.org/2004/281
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