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ICALP
2005
Springer

Hierarchical Group Signatures

9 years 5 months ago
Hierarchical Group Signatures
We introduce the notion of 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.
Mårten Trolin, Douglas Wikström
Added 27 Jun 2010
Updated 27 Jun 2010
Type Conference
Year 2005
Where ICALP
Authors Mårten Trolin, Douglas Wikström
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