Visual Cryptography and Secret Image Sharing

5

Probabilistic Visual Cryptography Schemes

Stelvio Cimato, Roberto De Prisco and Alfredo De Santis

Università degli Studi di Milano, Italy

Università di Salerno, Italy

CONTENTS

5.1 Introduction

5.2 Visual Cryptography Schemes

5.2.1 The Deterministic Model

5.2.2 The Probabilistic Model

5.3 Canonical Probabilistic Schemes

5.4 Probabilistic Schemes with No Pixel Expansion

5.5 Trading Pixel Expansion with Probabilities

5.5.1 Probabilistic Schemes with Given Pixel Expansion

5.6 Constructing Probabilistic Schemes

5.6.1 (n, n)-Threshold Probabilistic Schemes with Any Pixel Expansion

5.6.2 (2, n)-Threshold Probabilistic Schemes with Any Pixel Expansion

5.7 Probabilistic Schemes with Boolean Operations

5.7.1 (2,n) Scheme for Binary Images ...