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Erschienen in:
2010 | OriginalPaper | Buchkapitel
Bonsai Trees, or How to Delegate a Lattice Basis
verfasst von : David Cash, Dennis Hofheinz, Eike Kiltz, Chris Peikert
Erschienen in: Advances in Cryptology – EUROCRYPT 2010
Verlag: Springer Berlin Heidelberg
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We introduce a new
lattice-based
cryptographic structure called a
bonsai tree
, and use it to resolve some important open problems in the area. Applications of bonsai trees include:
An efficient, stateless ‘hash-and-sign’ signature scheme in the
standard model
(i.e., no random oracles), and
The first
hierarchical
identity-based encryption (HIBE) scheme (also in the standard model) that does not rely on bilinear pairings.
Interestingly, the abstract properties of bonsai trees seem to have no known realization in conventional number-theoretic cryptography.