## CryptoDB

### Paper: Compact Group Signatures Without Random Oracles

Authors: Xavier Boyen Brent Waters URL: http://eprint.iacr.org/2005/381 Search ePrint Search Google We present the first efficient group signature scheme that is provably secure without random oracles. We achieve this result by combining provably secure hierarchical signatures in bilinear groups with a novel adaptation of the recent Non-Interactive Zero Knowledge proofs of Groth, Ostrovsky, and Sahai. The size of signatures in our scheme is logarithmic in the number of signers; we prove it secure under the Computational Diffie-Hellman and the Subgroup Decision assumptions in the model of Bellare, Micciancio, and Warinshi, as relaxed by Boneh, Boyen, and Shacham.
##### BibTeX
@misc{eprint-2005-12715,
title={Compact Group Signatures Without Random Oracles},
booktitle={IACR Eprint archive},
keywords={public-key cryptography / Group Signatures},
url={http://eprint.iacr.org/2005/381},
note={ bwaters@csl.sri.com 13214 received 20 Oct 2005, last revised 7 Mar 2006},
author={Xavier Boyen and Brent Waters},
year=2005
}