Something About All or Nothing (Transforms)

  • Authors:
  • D. R. Stinson

  • Affiliations:
  • Department of Combinatorics and Optimization, University of Waterloo, Waterloo Onatrio, N2L 3G1, Canada

  • Venue:
  • Designs, Codes and Cryptography
  • Year:
  • 2001

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Abstract

Inthis short note, we study all-or-nothing transforms, which wererecently proposed by Rivest as a mode of operation for blockciphers. We study transforms of this type that provide unconditionalsecurity. A simple construction for linear transforms is given,and some existence and non-existence results for general transformsare derived from a combinatorial characterization of these objects.