Opis: Image Encryption - Saleh A. Alshebeili, El-Sayed M. El-Rabaie, Osama S. Faragallah

Presenting encryption algorithms with diverse characteristics, Image Encryption: A Communication Perspective examines image encryption algorithms for the purpose of secure wireless communication. It considers two directions for image encryption: permutation-based approaches and substitution-based approaches. Covering the spectrum of image encryption principles and techniques, the book compares image encryption with permutation- and diffusion-based approaches. It explores number theory-based encryption algorithms such as the Data Encryption Standard, the Advanced Encryption Standard, and the RC6 algorithms. It not only details the strength of various encryption algorithms, but also describes their ability to work within the limitations of wireless communication systems. Since some ciphers were not designed for image encryption, the book explains how to modify these ciphers to work for image encryption. It also provides instruction on how to search for other approaches suitable for this task. To make this work comprehensive, the authors explore communication concepts concentrating on the orthogonal frequency division multiplexing (OFDM) system and present a simplified model for the OFDM communication system with its different implementations. Complete with simulation experiments and MATLAB(R) codes for most of the simulation experiments, this book will help you gain the understanding required to select the encryption method that best fulfills your application requirements.Introduction Fundamentals of Image Encryption Introduction Basic Concepts of Cryptography Goals of Cryptography Principles of Encryption Classification of Encryption Algorithms Classification According to Encryption Structure Classification According to Keys Classification According to Percentage of Encrypted Data Cryptanalysis Features of Image Encryption Schemes Conventional Symmetric Block Ciphers Data Encryption Standard Double DES Triple DES International Data Encryption Algorithm Blowfish RC5 Algorithm RC5 Encryption Algorithm RC5 Decryption Algorithm RC5 Key Expansion RC6 Algorithm RC6 Encryption Algorithm RC6 Decryption Algorithm The Advanced Encryption Standard Modes of Operation The ECB Mode The CBC Mode The CFB Mode The OFB Mode Chaos and Cryptography The 2D Chaotic Baker Map Encryption Evaluation Metrics Introduction Encryption Evaluation Metrics Histogram Deviation Correlation Coefficient Irregular Deviation Histogram Uniformity Deviation from Ideality Avalanche Effect NPCR and UACI Other Tests Noise Immunity The Processing Time Testing the Evaluation Metrics Summary Homomorphic Image Encryption Overview Homomorphic Cryptosystem Security Analysis and Test Results Statistical Analysis Histograms of Encrypted Images Encryption Quality Measurements Key Space Analysis Exhaustive Key Search Key Sensitivity Test Differential Analysis Effect of Noise Summary Chaotic Image Encryption with Different Modes of Operation Overview Chaotic Encryption with Modes of Operation Implementation Issues Simulation Examples and Discussion Summary Diffusion Mechanism for Data Encryption in the ECB Mode Introduction The Preprocessing Network The Addition Part The SPN Implementation Issues Effect of the Normalized Block Size on Diffusion Effect of the Normalized Block Size on Block Dependency Simulation Examples Encryption Quality Diffusion Encryption of Images with Few Details Summary Orthogonal Frequency Division Multiplexing Introduction Basic Principles of OFDM Orthogonality Frequency Domain Orthogonality OFDM System Model FFT-OFDM DCT-OFDM DWT-OFDM Discrete Wavelet Transform Implementation of the DWT Haar Wavelet Transform Guard Interval Insertion Communication Channels Additive White Gaussian Noise Channel Fading Channel Channel Estimation and Equalization OFDM Limitations Introduction Analysis of Intercarrier Interference CFO in FFT-OFDM System Model CFO in DCT-OFDM System Model CFO in DWT-OFDM System Model CFO Compensation Simulation Parameters Effect of PAPR PAPR Reduction Methods The Clipping Method The Companding Method The Hybrid Clipping-and-Companding Method Simulation Experiments of PAPR Reduction Methods Sampling Clock Offset System Model Simulation Examples Simulation Parameters Simulation Experiments in the Presence of CFO Simulation Experiments for Enhanced Algorithms Simulation Experiments of PAPR Reduction Methods Summary References Appendix A Appendix B Index

Szczegóły: Image Encryption - Saleh A. Alshebeili, El-Sayed M. El-Rabaie, Osama S. Faragallah

Tytuł: Image Encryption
Autor: Saleh A. Alshebeili, El-Sayed M. El-Rabaie, Osama S. Faragallah
Producent: CRC Press Inc.
ISBN: 9781466576988
Rok produkcji: 2013
Ilość stron: 418
Oprawa: Twarda
Waga: 0.73 kg

Recenzje: Image Encryption - Saleh A. Alshebeili, El-Sayed M. El-Rabaie, Osama S. Faragallah