## CryptoDB

### Paper: Hierarchical Group Signatures

Authors: Marten Trolin Douglas Wikstrom URL: http://eprint.iacr.org/2004/311 Search ePrint Search Google We introduce the notion of \emph{hierarchical group signatures}. This is a proper generalization of group signatures, which allows multiple group managers organized in a tree with the signers as leaves. For a signer that is a leaf of the subtree of a group manager, the group manager learns which of its children that (perhaps indirectly) manages the signer. We provide definitions for the new notion and construct a scheme that is provably secure given the existence of a family of trapdoor permutations. We also present a construction which is relatively practical, and prove its security in the random oracle model under the strong RSA assumption and the DDH assumption.
##### BibTeX
@misc{eprint-2004-12277,
title={Hierarchical Group Signatures},
booktitle={IACR Eprint archive},
keywords={cryptographic protocols / group signatures},
url={http://eprint.iacr.org/2004/311},
note={Presented at ICALP 2005. This is the full version. marten@nada.kth.se 12881 received 16 Nov 2004, last revised 8 Apr 2005},
author={Marten Trolin and Douglas Wikstrom},
year=2004
}