Visual cryptography

  • Moni Naor
  • Adi Shamir
Conference paper
First Online:
Part of the Lecture Notes in Computer Science book series (LNCS, volume 950)

Abstract

In this paper we consider a new type of cryptographic scheme, which can decode concealed images without any cryptographic computations. The scheme is perfectly secure and very easy to implement. We extend it into a visual variant of the k out of n secret sharing problem, in which a dealer provides a transparency to each one of the n users; any k of them can see the image by stacking their transparencies, but any k−1 of them gain no information about it.

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Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • Moni Naor
    • 1
  • Adi Shamir
    • 1
  1. 1.Department of Applied Math and Computer ScienceWeizmann InstituteRehovotIsrael

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