Welcome to the resource topic for 2009/146
Title:
Transferable Constant-Size Fair E-Cash
Authors: Georg Fuchsbauer, David Pointcheval, Damien Vergnaud
Abstract:We propose an efficient blind certification protocol with interesting properties. It falls in the Groth-Sahai framework for witness-indistinguishable proofs, thus extended to a certified signature it immediately yields non-frameable group signatures. We use blind certification to build an efficient (offline) e-cash system that guarantees user anonymity and transferability of coins without increasing their size. As required for fair e-cash, in case of fraud, anonymity can be revoked by an authority, which is also crucial to deter from double spending.
ePrint: https://eprint.iacr.org/2009/146
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