\newcommand{\etalchar}[1]{$^{#1}$}
\begin{thebibliography}{CdBvH{\etalchar{+}}89}

\bibitem[Bur96]{Burmester1996}
Mike Burmester.
\newblock Homomorphisms of secret sharing schemes: A tool for verifiable
  signature sharing.
\newblock In Ueli Maurer, editor, {\em Advances in Cryptology---EUROCRYPT~96},
  volume 1070 of {\em Lecture Notes in Computer Science}, pages 96--106.
  Springer-Verlag, 12--16~May 1996.

\bibitem[CdBvH{\etalchar{+}}89]{ChaumBHMS1989}
David Chaum, Bert den Boer, Eug{\`e}ne van Heyst, Stig Mj{\o}lsnes, and Adri
  Steenbeek.
\newblock Efficient offline electronic checks (extended abstract).
\newblock In Quisquater and Vandewalle \cite{EUROCRYPT89}, pages 294--301.

\bibitem[Cha89]{Chaum1989}
David Chaum.
\newblock Online cash checks.
\newblock In Quisquater and Vandewalle \cite{EUROCRYPT89}, pages 288--293.

\bibitem[CS97]{CamenischS1997}
Jan Camenisch and Markus Stadler.
\newblock Efficient group signature schemes for large groups (extended
  abstract).
\newblock In Burton~S. Kaliski~Jr., editor, {\em Advances in
  Cryptology---CRYPTO~'97}, volume 1294 of {\em Lecture Notes in Computer
  Science}, pages 410--424. Springer-Verlag, 17--21~August 1997.

\bibitem[FR95]{FranklinR1995}
Matthew~K. Franklin and Michael~K. Reiter.
\newblock Verifiable signature sharing.
\newblock In Guillou and Quisquater \cite{EUROCRYPT95}, pages 50--63.

\bibitem[GQ95]{EUROCRYPT95}
Louis~C. Guillou and Jean-Jacques Quisquater, editors.
\newblock {\em Advances in Cryptology---EUROCRYPT~95}, volume 921 of {\em
  Lecture Notes in Computer Science}. Springer-Verlag, 21--25~May 1995.

\bibitem[OO91]{OkamotoO1991}
Tatsuaki Okamoto and Kazuo Ohta.
\newblock Universal electronic cash.
\newblock In J.~Feigenbaum, editor, {\em Advances in Cryptology---CRYPTO~'91},
  volume 576 of {\em Lecture Notes in Computer Science}, pages 324--337.
  Springer-Verlag, 1992, 11--15~August 1991.

\bibitem[OOK90]{OhtaOK1990}
Kazuo Ohta, Tatsuaki Okamoto, and Kenji Koyama.
\newblock Membership authentication for hierarchical multigroups using the
  extended {Fiat-Shamir} scheme.
\newblock In I.~B. Damg{\aa}rd, editor, {\em Advances in
  Cryptology---EUROCRYPT~90}, volume 473 of {\em Lecture Notes in Computer
  Science}, pages 446--457. Springer-Verlag, 1991, 21--24~May 1990.

\bibitem[PSW95]{PfitzmannSW1995}
Birgit Pfitzmann, Matthias Schunter, and Michael Waidner.
\newblock How to break another ``provably secure'' payment system.
\newblock In Guillou and Quisquater \cite{EUROCRYPT95}, pages 121--132.

\bibitem[PW97]{PfitzmannW1997}
Birgit Pfitzmann and Michael Waidner.
\newblock Strong loss tolerance of electronic coin systems.
\newblock {\em ACM Transactions on Computer Systems}, 15(1):194--213, February
  1997.

\bibitem[QV89]{EUROCRYPT89}
J.-J. Quisquater and J.~Vandewalle, editors.
\newblock {\em Advances in Cryptology---EUROCRYPT~89}, volume 434 of {\em
  Lecture Notes in Computer Science}. Springer-Verlag, 1990, 10--13~April 1989.

\bibitem[Sim96]{Simon1996}
Daniel~R. Simon.
\newblock Anonymous communication and anonymous cash.
\newblock In Neal Koblitz, editor, {\em Advances in Cryptology---CRYPTO~'96},
  volume 1109 of {\em Lecture Notes in Computer Science}, pages 61--73.
  Springer-Verlag, 18--22~August 1996.

\end{thebibliography}
