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ESSVCS: An Enriched Secret Sharing Visual Cryptography

  • Feng Liu
  • Wei Q. Yan
  • Peng Li
  • Chuankun Wu
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8363)

Abstract

Visual Cryptography (VC) is a powerful technique that combines the notions of perfect ciphers and secret sharing in cryptography with that of raster graphics. A binary image can be divided into shares that are able to be stacked together so as to approximately recover the original image. VC is a unique technique in the sense that the encrypted message can be decrypted directly by the Human Visual System (HVS). The distinguishing characteristic of VC is the ability of secret restoration without the use of computation. However because of restrictions of the HVS, pixel expansion and alignment problems, a VC scheme perhaps can only be applied to share a small size of secret image. In this paper, we propose a general method to let the VC shares carry more secrets, the technique is to use cypher output of private-key systems as the input random numbers of VC scheme, meanwhile the encryption key could be shared, the shared keys could be associated with the VC shares. After this operation, VC scheme and secret sharing scheme are merged with the private-key system. Under this design, we implement a (k,t,n)-VC scheme. Compared to those existing schemes, our approach could greatly enhance the ability of current VC schemes and could cope with pretty rich secrets.

Keywords

Secret Sharing Visual Cryptography Covert Data 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Feng Liu
    • 1
  • Wei Q. Yan
    • 2
  • Peng Li
    • 3
  • Chuankun Wu
    • 1
  1. 1.State Key Laboratory of Information Security, Institute of Information EngineeringChinese Academy of SciencesBeijingChina
  2. 2.School of Computing and Mathematical SciencesAuckland University of TechnologyNew Zealand
  3. 3.Department of Mathematics and PhysicsNorth China Electric Power UniversityBaodingChina

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