Constructions of Visual Cryptography Schemes.

Date of Submission

December 2003

Date of Award

Winter 12-12-2004

Institute Name (Publisher)

Indian Statistical Institute

Document Type

Master's Dissertation

Degree Name

Master of Technology

Subject Name

Computer Science

Department

Applied Statistics Unit (ASU-Kolkata)

Supervisor

Roy, Bimal Kumar (ASU-Kolkata; ISI)

Abstract (Summary of the Work)

Visual cryptography is a secrei sharing scheme in which the secret is an image. The image could be a page of printed texc, a photograph, a picture, etc. A visual cryptography scheme enables an image to be split into a number of shares that are printed on transparencies, so that when certain subsets of these transparencies are stacked together, one can see the original image. By examining other subsets of transparencies, one obtains no information about the secret image.In this thesis, we review three classes of visual cryptography schemes- those that are applicable to black/white, grey-level, Ã nd color images. We also present a new (2, n) visual cryptography scheme for color images. In such a scheme, the dealer provides a transparency to each one of n users; any two of them can see the image by stacking their transparencies, but no one of them can gain any information about it. Finally, we present some apen problems in color visual cryptography.

Comments

ProQuest Collection ID: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqm&rft_dat=xri:pqdiss:28843476

Control Number

ISI-DISS-2003-112

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

DOI

http://dspace.isical.ac.in:8080/jspui/handle/10263/6283

This document is currently not available here.

Share

COinS