A multisecret sharing scheme for color images based on cellular automata

  • Authors:

  • G. Alvarez;L. Hernández Encinas;A. Martín del Rey

  • Affiliations:

  • Department of Information Processing and Coding, Applied Physics Institute, CSIC, C/Serrano 144, 28006 Madrid, Spain;Department of Information Processing and Coding, Applied Physics Institute, CSIC, C/Serrano 144, 28006 Madrid, Spain;Department of Applied Mathematics, EPS, Universidad de Salamanca, C/Hornos Caleros 50, 05003 Ávila, Spain

  • Venue:
  • Information Sciences: an International Journal
  • Year:
  • 2008

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Abstract

In this work a new multisecret sharing scheme for secret color images among a set of users is proposed. The protocol allows that each participant in the scheme to share a secret color image with the rest of participants in such a way that all of them can recover all the secret color images only if the whole set of participants pools their shadows. The proposed scheme is based on the use of bidimensional reversible cellular automata with memory. The security of the scheme is studied and it is proved that the protocol is ideal and perfect and that it resists the most important statistical attacks.