Paper 2009/146

Transferable Constant-Size Fair E-Cash

Georg Fuchsbauer, David Pointcheval, and 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.

Metadata
Available format(s)
PDF PS
Publication info
Published elsewhere. Appears in CANS 2009
Keywords
anonymityblind signaturesgroup signaturestransferable e-cashfair e-cash
Contact author(s)
fuchsbau @ di ens fr
History
2009-11-26: last of 2 revisions
2009-03-31: received
See all versions
Short URL
https://ia.cr/2009/146
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2009/146,
      author = {Georg Fuchsbauer and David Pointcheval and Damien Vergnaud},
      title = {Transferable Constant-Size Fair E-Cash},
      howpublished = {Cryptology {ePrint} Archive, Paper 2009/146},
      year = {2009},
      url = {https://eprint.iacr.org/2009/146}
}
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