this textbook is a practical yet in depth guide to cryptography and its principles and practices. the book places cryptography in real-world security situations using the hands-on information contained throughout the chapters. prolific author dr. chuck easttom lays out essential math skills and fully explains how to implement cryptographic algorithms in today's data protection landscape. readers learn and test out how to use ciphers and hashes, generate random keys, handle vpn and wi-fi security, and encrypt voip, email, and web communications. the book also covers cryptanalysis, steganography, and cryptographic backdoors and includes a description of quantum computing and its impact on cryptography. this book is meant for those without a strong mathematics background _ only just enough math to understand the algorithms given. the book contains a slide presentation, questions and answers, and exercises throughout. presents a comprehensive coverage of cryptography in an approachable format;covers the basic math needed for cryptography _ number theory, discrete math, and algebra (abstract and linear);includes a full suite of classroom materials including exercises, q&a, and examples.