Bonsai Trees (or, Arboriculture in Lattice-Based Cryptography)

  title={Bonsai Trees (or, Arboriculture in Lattice-Based Cryptography)},
  author={Chris Peikert},
  journal={IACR Cryptology ePrint Archive},
We introduce bonsai trees, a lattice-based cryptographic primitive that we apply 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… CONTINUE READING


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