Designs, Codes and Cryptography

, Volume 20, Issue 3, pp 325-336

First online:

New Colored Visual Secret Sharing Schemes

  • Ching-Nung YangAffiliated withDepartment of Computer Science and Information Engineering, National Dong Hwa University
  • , Chi-Sung LaihAffiliated withDepartment of Electrical Engineering, National Cheng Kung University

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Visual secretsharing (VSS) schemes are used to protect the visual secret bysending n transparencies to different participantsso that k-1 or fewer of them have no informationabout the original image, but the image can be seen by stackingk or more transparencies. However, the revealedsecret image of a conventional VSS scheme is just black and white.The colored k out of n VSS scheme sharinga colored image is first introduced by Verheul and Van Tilborg[1]. In this paper, a new construction for the colored VSS schemeis proposed. This scheme can be easily implemented on basis ofa black & white VSS scheme and get much better block lengththan the Verheul-Van Tilborg scheme.

Visual cryptography secret sharing scheme