International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 01 April 2013

Julien Bringer, Herve Chabanne, Alain Patey
ePrint Report ePrint Report
At ISC 2012, Bender et al. introduced the notion of domain-specific pseudonymous signatures for ID documents. With this primitive, a user can sign with domain-specific pseudonyms, that cannot be linked across domains but that are linkable in a given domain. However, their security model assumes non-collusion of malicious users, which is a strong assumption. We therefore propose improvements to their construction. Our main contribution is a new pseudonymous signature scheme based on group signatures that is collusion-resistant.

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