The book Information Theory, Coding and Cryptography has been designed for engineering students and practitioners. This revised edition of the text offers refreshed pedagogy and new chapters on Space Time Codes, and Physical Layer Security thereby increasing the scope of study for the communications engineers. The changes have been made keeping the extremely popular flavor of the book intact – in depth coverage of fundamental concepts and thought provoking drill problems. This book contains a plethora of solved and unsolved problems and multiple choice questions with an emphasis.