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Paper 2008/528
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.
Metadata
- Available format(s)
- Category
- Public-key cryptography
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- NIZKbilinear groupsanonymityunlinkabilitygroup signaturesnon-frameability
- Contact author(s)
- fuchsbau @ di ens fr
- History
- 2008-12-19: received
- Short URL
- https://ia.cr/2008/528
- License
-
CC BY