One-way permutations, interactive hashing and statistically hiding commitments

  • Authors:
  • Hoeteck Wee

  • Affiliations:
  • Computer Science Division, University of California, Berkeley

  • Venue:
  • TCC'07 Proceedings of the 4th conference on Theory of cryptography
  • Year:
  • 2007

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Abstract

We present a lower bound on the round complexity of a natural class of black-box constructions of statistically hiding commitments from one-way permutations. This implies a ω(n/log n) lower bound on the round complexity of a computational form of interactive hashing, which has been used to construct statistically hiding commitments (and related primitives) from various classes of one-way functions, starting with the work of Naor, Ostrovsky, Venkatesan and Yung (J. Cryptology, 1998). Our lower bound matches the round complexity of the protocol studied by Naor et al.