Extended visual cryptography scheme for color images with no pixel expansion

Xiaoyu Wu, Duncan S. Wong, Qing Li

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

2 Citations (Scopus)

Abstract

A &-out-of-η Extended Visual Cryptography Scheme (EVCS) is a secret sharing scheme which hides a secret image into η shares, which are also some images. The secret image can be recovered if at least k of the shares are superimposed, while nothing can be obtained if less than κ shares are known. Previous EVCS schemes are either for black-and-white images or having pixel expansion. In this paper, we propose the first κ-out-of-n EVCS for color images with no pixel expansion. The scheme also improves the contrast of the n shares and the reconstructed secret image (i.e. the superimposed image of any κ or more shares) by allowing users to specify the level of each primary color (i.e. Red, Green and Blue) in the image shares as well as the reconstructed secret image.

Original languageEnglish
Title of host publicationSECRYPT 2010 - Proceedings of the International Conference on Security and Cryptography
Pages423-426
Number of pages4
Publication statusPublished - 1 Dec 2010
Externally publishedYes
EventInternational Conference on Security and Cryptography, SECRYPT 2010 - Athens, Greece
Duration: 26 Jul 201028 Jul 2010

Publication series

NameSECRYPT 2010 - Proceedings of the International Conference on Security and Cryptography

Conference

ConferenceInternational Conference on Security and Cryptography, SECRYPT 2010
Country/TerritoryGreece
CityAthens
Period26/07/1028/07/10

Keywords

  • Extended visual Cryptography
  • Information hiding
  • Secret sharing

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Computer Science Applications

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