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Efficient Group Signatures without Trapdoors
Authors: Giuseppe Ateniese, Breno de MedeirosAbstract:
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.
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