Visual Cryptography and Secret Image Sharing

3

Visual Cryptography for Multiple Secrets

Shyong Jian Shyu

Ming Chuan University, Taiwan

CONTENTS

3.1 Introduction

3.2 Naor and Shamir’s Basic Visual Secret Sharing Scheme

3.3 Visual Two-Secret Sharing Schemes

3.3.1 Wu and Chen’s Scheme

3.3.2 Wu and Chang’s Scheme

3.4 Visual Multiple-Secret Sharing Schemes

3.4.1 Shyu et al.’s Scheme

3.4.1.1 Informal Description

3.4.1.2 Encoding Circle Share A

3.4.1.3 Encoding Circle Share B

3.4.1.4 General Algorithm

3.4.2 Feng et al.’s Scheme

3.4.3 Experimental Results

3.4.4 Comparison and Discussions

3.5 Concluding Remarks

Bibliography

3.1 Introduction

Visual cryptography proposed by Naor and Shamir [7] discloses the possibility for using human visual ability to perform the decryption process. ...