Encrypting Proofs on Pairings and Its Application to Anonymity for Signatures

Georg Fuchsbauer and David Pointcheval

Abstract

We give a generic methodology to unlinkably anonymize cryptographic schemes in bilinear groups using the Boneh-Goh-Nissim cryptosystem and NIZK proofs in the line of Groth, Ostrovsky and Sahai. We illustrate our techniques by presenting the first instantiation of anonymous proxy signatures, a recent primitive unifying the functionalities and strong security notions of group and proxy signatures. To construct our scheme, we introduce various efficient NIZK and witness-indistinguishable proofs, and a relaxed version of simulation soundness.

Available format(s)
Category
Public-key cryptography
Publication info
Published elsewhere. Unknown where it was published
Keywords
Contact author(s)
fuchsbau @ di ens fr
History
Short URL
https://ia.cr/2008/528

CC BY

BibTeX

@misc{cryptoeprint:2008/528,
author = {Georg Fuchsbauer and David Pointcheval},
title = {Encrypting Proofs on Pairings and Its Application to Anonymity for Signatures},
howpublished = {Cryptology ePrint Archive, Paper 2008/528},
year = {2008},
note = {\url{https://eprint.iacr.org/2008/528}},
url = {https://eprint.iacr.org/2008/528}
}

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