# Information Security and Cryptography Research Group

## Efficient and Generalized Group Signatures

### Jan Camenisch

Advances in Cryptology — EUROCRYPT '97, Lecture Notes in Computer Science, Springer-Verlag, vol. 1233, pp. 465–479, May 1997.

The concept of group signatures was introduced by Chaum et al. at Eurocrypt '91. It allows a member of a group to sign messages anonymously on behalf of the group. In case of a later dispute a designated group manager can revoke the anonymity and identify the originator of a signature. In this paper we propose a new efficient group signature scheme. Furthermore we present a model and the first realization of generalized group signatures. Such a scheme allows to define coalitions of group members that are able to sign on the group's behalf.

## BibTeX Citation

@inproceedings{Cameni97,
author       = {Jan Camenisch},
title        = {Efficient and Generalized Group Signatures},
editor       = {Walter Fumy},
booktitle    = {Advances in Cryptology --- EUROCRYPT~'97},
pages        = {465--479},
series       = {Lecture Notes in Computer Science},
volume       = {1233},
year         = {1997},
month        = {5},
publisher    = {Springer-Verlag},
}