The breaking of the Enigma machine is one of the most heroic stories of the Second World War and highlights the crucial work of the codebreakers of Bletchley Park, which prevented Britain's certain defeat in 1941. But there was another German cipher machine, used by Hitler himself to convey messages to his top generals in the field. A machine more complex and secure than Enigma. A machine that could never be broken. For sixty years, no one knew about Lorenz or 'Tunny', or the determined group of men who finally broke the code and thus changed the course of the war. Many of them went to their deaths without anyone knowing of their achievements. Here, for the first time, senior codebreaker Captain Jerry Roberts tells the complete story of this extraordinary feat of intellect and of his struggle to get his wartime colleagues the recognition they deserve. The work carried out at Bletchley Park during the war to partially automate the process of breaking Lorenz, which had previously been done entirely by hand, was groundbreaking and is recognised as having kick-started the modern computer age.

The award-winning New York Times bestseller about the American women who secretly served as codebreakers during World War II--a "prodigiously researched and engrossing" (New York Times) book that "shines a light on a hidden chapter of American history" (Denver Post). Recruited by the U.S. Army and Navy from small towns and elite colleges, more than ten thousand women served as codebreakers during World War II. While their brothers and boyfriends took up arms, these women moved to Washington and learned the meticulous work of code-breaking. Their efforts shortened the war, saved countless lives, and gave them access to careers previously denied to them. A strict vow of secrecy nearly erased their efforts from history; now, through dazzling research and interviews with surviving code girls, bestselling author Liza Mundy brings to life this riveting and vital story of American courage, service, and scientific accomplishment.

This book tells the story of the Anglo-American search for Germany's Signal Intelligence agencies at the end of World War II, a subject so sensitive that it was kept Top Secret by the NSA for over 70 years. For the first time the complete story is told, along with description of the codes, ciphers, machines and personnel of the Nazi effort in this most secret realm.

Unbreakable is the edge-of-your seat true story of the codebreakers, spies, and navy fighters who helped defeat the Nazis and turned the tide of World War II—perfect for fans of The Imitation Game, Alan Gratz, and Jennifer Nielsen. "A thrilling adventure of intrigue and daring worthy of the best James Bond stories." —James Ponti, New York Times best-selling author of City Spies As the Germans waged a brutal war across Europe, details of every Nazi plan, every attack, every troop movement were sent over radio. But to the Allied troops listening in—and they were always listening—the crucial messages sounded like gibberish. The communications were encoded with a powerful cipher, making all information utterly inaccessible . . . unless you could unlock the key to the secret code behind the German’s powerful Enigma machine. Complete with more than sixty historical photos, Unbreakable tells the true story of one of the most dangerous war-time codebreaking efforts ever. While Hitler marched his troops across newly conquered lands and deadly “wolfpacks” of German U-Boats prowled the open seas, a team of codebreakers, spies, and navy men raced against the clock to uncover the secrets that hid German messages in plain sight. Victory—or defeat—in World War II would hinge on their desperate attempts to crack the code. Perfect for fans of Bomb, The Boys Who Challenged Hitler, and The Nazi Hunters.

Have you ever wondered how successful Hitler's codebreakers were at breaking Allied codes during World War 2? The wartime story of codebreaking has almost exclusively centred around Allied successes, particularly that of Bletchley Park breaking the Enigma code. However, the Germans in particular were extremely active in codebreaking and had their successes. But it was not until after the war that the extent or otherwise of their triumphs could be gauged. With the war in Europe at an end, in April-May 1945 British and American codebreaking teams hunted for their German counterparts to find out just how good they had been. There were lessons to be learned for the post-war period for Western military intelligence. This publication is a summary of the European Axis Signal Intelligence in World War II as revealed by 'TICOM' Investigations and by other Prisoner of War Interrogations and Captured Material, Principally German and completed in May 1946. This is available on the National Security Agency website. TICOM - Target Intelligence Committee - was a shadowy Anglo-American organisation set up in October 1944 whose cover name disguised its real purpose - the seeking out in the immediate aftermath of the war of German Sigint staff for interrogation. This edited volume extracts key data from the 1000 pages of the original documents to create a fascinating and technical insight into German cryptography. The book is a technical summary of the TICOM documents using the words of those who collected the data. The complex data was written for military analysis so the Allies could assess Hitler's codebreaking operation during the war. It becomes clear that Hitler's team understood that the Enigma cipher machine had weaknesses and that they had various ingenious machines either developed or under development as the war drew to a close. Lack of resources - and running out of time - put paid to any major operational deployment of this machinery, but underlines the fact that German ingenuity came close to a situation where they would have made Bletchley Park's task almost impossible. Includes a report on the interrogation of 5 leading Germans in Nuremburg, September 1945 regarding signals intelligence. They are: General Jodl, Grand Admiral Donitz, General Field Marshall Keitel, Herr von Ribbentrop and Field Marshall Goering.

'Turing writes on codebreaking with understandable authority and compelling panache.' - Michael Smith, bestselling author of Station X. At Bletchley Park, some of Britain's most talented mathematicians, linguists, and intellectuals were assembled to break Nazi codes. Kept secret for nearly thirty years, we have now come to realise the crucial role that these codebreakers played in the Allied victory in World War II. Written by Dermot Turing - the nephew of famous codebreaker Alan Turing - this illustrated account provides unique insight into the behind-the-scenes action at Bletchley Park. Discover how brilliant and eccentric individuals such as Dilly Knox, Alan Turing and Joan Clarke were recruited, the social life that grew up around the park, and how they dealt with the ever-present burden of secrecy. Including a foreword by Professor Christopher Andrew of Cambridge University, author of MI5's official history The Secret World, this book brings to life the stories of the men and women who toiled day and night to crack the seemingly unbreakable enigma code.

An eye-opening account of the rise of science in Germany through to Hitler’s regime, and the frightening Nazi experiments that occurred during the Reich A shocking account of Nazi science, and a compelling look at the the dramatic rise of German science in the nineteenth century, its preeminence in the early twentieth, and the frightening developments that led to its collapse in 1945, this is the compelling story of German scientists under Hitler’s regime. Weaving the history of science and technology with the fortunes of war and the stories of men and women whose discoveries brought both benefits and destruction to the world, Hitler's Scientists raises questions that are still urgent today. As science becomes embroiled in new generations of weapons of mass destruction and the war against terrorism, as advances in biotechnology outstrip traditional ethics, this powerful account of Nazi science forms a crucial commentary on the ethical role of science.