This book discusses the evolution of security and privacy issues and brings related technological tools, techniques, and solutions into one single source. The book will take readers on a journey to understanding the security issues and possible solutions involving various threats, attacks, and defense mechanisms, which includes IoT, Cloud Computing, Big Data, Light-Weight Cryptography for Block-chain, Data-Intensive techniques and how it can be applied to various applications for general and specific use. Graduate and postgraduate students, researchers, and those working in the industry will find this book easy to understand and use for security applications and privacy issues.