Random oracles are practical: a paradigm for designing efficient protocols

  • Authors:
  • Mihir Bellare;Phillip Rogaway

  • Affiliations:
  • High Performance Computing and Communications, IBM T.J. Watson Research Center, P.O. Box 704, Yorktown Heights, NY;PS LAN System Design, IBM Personal Software Products, 11400 Burnet Road, Austin, TX

  • Venue:
  • CCS '93 Proceedings of the 1st ACM conference on Computer and communications security
  • Year:
  • 1993

Quantified Score

Hi-index 0.08

Visualization

Abstract

We argue that the random oracle model—where all parties have access to a public random oracle—provides a bridge between cryptographic theory and cryptographic practice. In the paradigm we suggest, a practical protocol P is produced by first devising and proving correct a protocol PR for the random oracle model, and then replacing oracle accesses by the computation of an “appropriately chosen” function h. This paradigm yields protocols much more efficient than standard ones while retaining many of the advantages of provable security. We illustrate these gains for problems including encryption, signatures, and zero-knowledge proofs.