A TV tie-in edition of "The Code Book" filmed as a prime-time five-part Channel 4 series on the history of codes and code-breaking and presented by the author. This book, which accompanies the major Channel 4 series, brings to life the hidden history of codes and code breaking. Since the birth of writing, there has also been the need for secrecy. The story of codes is the story of the brilliant men and women who used mathematics, linguistics, machines, computers, gut instinct, logic and detective work to encrypt and break these secrect messages and the effect their work has had on history. In each episode of "The Science of Secrecy" Simon Singh tells us a fascinating story from the history of codes: how the course of Crimean War was changed by the cracking of "unbreakable" Vigenere code; how the well-timed cracking of a single encoded telegram altered the course of World War I or how the mysteries of the Rosetta stone were revealed. The programme, and book, also investigates present day concerns about privacy on the internet and public key cryptography and looks to the future and the possibilities that quantum computing will radically change the science of secrecy in the 21st century.