Perceptual Digital Imaging

14

Perceptual Encryption of Digital Images and Videos

Shujun Li

14.1 Introduction

14.2 Fundamentals of Multimedia Coding and Cryptography

14.2.1 Image and Video Coding

14.2.2 Modern Cryptography and Cryptanalysis

14.3 Multimedia Encryption in General

14.3.1 Threat Model

14.3.2 Three Approaches to Multimedia Encryption

14.3.2.1 Encryption before Encoding

14.3.2.2 Encryption after Encoding

14.3.2.3 Joint Encryption and Encoding

14.4 Perceptual Multimedia Encryption

14.4.1 Definition and Performance Evaluation

14.4.2 Perceptual Encryption Schemes

14.4.2.1 Scalability-Based Encryption

14.4.2.2 DCT-Based Image and Video Encryption

14.4.2.3 DWT-Based Image and Video Encryption

14.4.2.4 Motion Vector Scrambling

14.4.2.5 Fixed-Length Codeword Encryption ...