International Association for Cryptologic Research

International Association
for Cryptologic Research


Paper: Efficient Group Signatures without Trapdoors

Giuseppe Ateniese
Breno de Medeiros
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Abstract: Group signature schemes enable unlinkably anonymous authentication, in the same fashion that digital signatures provide the basis for strong authentication protocols. This paper introduces the first group signature scheme with constant-size parameters that does not require any group member, including group managers, to know trapdoor secrets. This novel type of group signature scheme allows public parameters to be shared among organizations, and are useful when several distinct groups must interact and exchange information about individuals while protecting their privacy.
  title={Efficient Group Signatures without Trapdoors},
  booktitle={IACR Eprint archive},
  keywords={cryptographic protocols /},
  note={This is a REVISED version of the paper that appeared in ASIACRYPT 2003. 12529 received 12 Nov 2002, last revised 20 Apr 2004},
  author={Giuseppe Ateniese and Breno de Medeiros},