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Visual Cryptography and Secret Image Sharing by Ching-Nung Yang, Stelvio Cimato

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10

Cheating Prevention in Visual Cryptography

Chen Yu-Chi, Horng Gwoboa and Tsai Du-Shiau

National Chung Hsing University, Taiwan

National Chung Hsing University, Taiwan

Hsiuping Institute of Technology, Taiwan

CONTENTS

10.1 Introduction

In 1994, Naor and Shamir proposed a variant of secret sharing called Visual Cryptography (VC) [9], where the shares given to participants are xeroxed onto transparencies. If X is an authorized subset, then the participants in X can visually recover ...

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