David Kahn – författare

The magnificent, unrivaled history of codes and ciphers—how they're made, how they're broken, and the many and fascinating roles they've played since the dawn of civilization in war, business, diplomacy, and espionage—updated with a new chapter on computer cryptography and the Ultra secret.Man has created codes to keep secrets and has broken codes to learn those secrets since the time of the Pharaohs. For 4,000 years, fierce battles have been waged between codemakers and codebreakers, and the story of these battles is civilization's secret history, the hidden account of how wars were won and lost, diplomatic intrigues foiled, business secrets stolen, governments ruined, computers hacked. From the XYZ Affair to the Dreyfus Affair, from the Gallic War to the Persian Gulf, from Druidic runes and the kaballah to outer space, from the Zimmermann telegram to Enigma to the Manhattan Project, codebreaking has shaped the course of human events to an extent beyond any easy reckoning. Once a government monopoly, cryptology today touches everybody. It secures the Internet, keeps e-mail private, maintains the integrity of cash machine transactions, and scrambles TV signals on unpaid-for channels. David Kahn's The Codebreakers takes the measure of what codes and codebreaking have meant in human history in a single comprehensive account, astonishing in its scope and enthralling in its execution. Hailed upon first publication as a book likely to become the definitive work of its kind, The Codebreakers has more than lived up to that prediction: it remains unsurpassed. With a brilliant new chapter that makes use of previously classified documents to bring the book thoroughly up to date, and to explore the myriad ways computer codes and their hackers are changing all of our lives, The Codebreakers is the skeleton key to a thousand thrilling true stories of intrigue, mystery, and adventure. It is a masterpiece of the historian's art.

A German patrol wiggles through Russian lines to return with details of Soviet defences. An expert Luftwaffe interrogator teases secret information from downed Allied airmen. Two spies steal ashore in Maine and make their way into New York City. Filled with episodes of intrigue and adventure, Hitler's Spies reveals the workings of German intelligence,the famed Abwehr, the dreaded SD, the codebreakers, the spies, and the intelligence gatherers of the Foreign Office,and explains its failure to best the Allies. Draws on original documents and extensive interviews.

Becoming increasingly popular as a self-defence method and fitness programme, Krav Maga is the Israeli military's renowned method for fending off attackers of all kinds. Based on the principles of doing minimal harm and enhancing our natural instincts for self-protection, anyone can master its moves - regardless of strength, size, age, or gender. Profiled in USA Today, The New Yorker, and New York Magazine, David Kahn is the top Krav Maga expert and instructor in the U.S. He presents the basic techniques and principles in this excellent beginner's guide. Topics include: Anticipating an attack; Understanding the body's vulnerable targets; Mastering essential defence techniques, and more. With illustrations and photographs, plus training drills and workouts, and a few advanced moves, this is an essential guide to an empowering and life-changing skill, as well as an amazing conditioning programme.

Based on the principles of using appropriate force and enhancing natural instincts for self-protection, anyone can master the moves of krav maga - regardless of strength, size, age, or gender.In this guide to advanced techniques, David Kahn explains: how to neutralize an opponent; essential footwork, positioning, and manoeuvres; and self-defence principles for women. By using common sense, taking basic precautions, and presenting yourself in a confident manner you can minimise the chances of being attacked. But if you are, David Kahn's lessons will help you to overcome your opponent and keep yourself safe. And the conditioning you will achieve by practicing these techniques will tone your muscles, improve your reflexes, and get you fit.

Spies, secret messages, and military intelligence have fascinated readers for centuries but never more than today, when terrorists threaten America and society depends so heavily on communications. Much of what was known about communications intelligence came first from David Kahn's pathbreaking book, The Codebreakers. Kahn, considered the dean of intelligence historians, is also the author of Hitler’s Spies: German Military Intelligence in World War II and Seizing the Enigma: The Race to Break the German U-Boat Codes, 1939-1943, among other books and articles.Kahn’s latest book, How I Discovered World War II's Greatest Spy and Other Stories of Intelligence and Code, provides insights into the dark realm of intelligence and code that will fascinate cryptologists, intelligence personnel, and the millions interested in military history, espionage, and global affairs. It opens with Kahn telling how he discovered the identity of the man who sold key information about Germany’s Enigma machine during World War II that enabled Polish and then British codebreakers to read secret messages.Next Kahn addresses the question often asked about Pearl Harbor: since we were breaking Japan’s codes, did President Roosevelt know that Japan was going to attack and let it happen to bring a reluctant nation into the war? Kahn looks into why Nazi Germany’s totalitarian intelligence was so poor, offers a theory of intelligence, explicates what Clausewitz said about intelligence, tells—on the basis of an interview with a head of Soviet codebreaking—something about Soviet Comint in the Cold War, and reveals how the Allies suppressed the second greatest secret of WWII.Providing an inside look into the efforts to gather and exploit intelligence during the past century, this book presents powerful ideas that can help guide present and future intelligence efforts. Though stories of WWII spying and codebreaking may seem worlds apart from social media security, computer viruses, and Internet surveillance, this book offers timeless lessons that may help today’s leaders avoid making the same mistakes that have helped bring at least one global power to its knees.The book includes a Foreword written by Bruce Schneier.

Why are some people more effective leaders? What makes them more engaging, more influential, and more successful than their peers?In "e;Cape, Spandex, Briefcase,"e; leadership expert David Kahn tells the story of a motivated young man who yearns to be successful in his new leadership role. He holds the manager title, but is struggling to become an actual leader. After an especially horrific experience, he is sent to a leadership coach…but why is this "e;expert"e; working in a comic book shop?With Superman, Spider-Man and their costumed companions serving as paradigms of what it means to be a leader, this book introduces the "e;Five Superpowers of Leaders"e; and presents us with practical tools and skills necessary to motivate teams and earn respect.A few endorsements for Cape, Spandex, Briefcase include:"e;… The book is spot on for new leaders and those who want to up their skill set. Kahn clearly understands how relationships are the basis of a successful leader."e;— JOHN BALDONI, Top 50 Inc.com Leadership Expert and author of 13 books including MOXIE: The Secret to Bold and Gutsy Leadership"e;…For anyone who feels overwhelmed or even plateaued at work, pick up Cape, Spandex, Briefcase and prepare to fly!"e;— MARSHALL GOLDSMITH, Top 50 Thinker and bestselling author of Triggers, MOJO, and What Got You Here Won't Get You There"e;If you have the courage and conviction to be a great leader you've found the perfect book…"e;— VERNE HARNISH, bestselling author of Scaling Up:How a Few Companies Make It…and Why the Rest Don't (Rockefeller Habits 2.0)"e;…Whether you're an entrepreneur who wants to grow your company, a manager trying to up your game, or someone aspiring to be in a leadership role, this book belongs on your desk."e;— KEVIN KRUSE, bestselling author of Employee Engagement 2.0"e;…you'll have unexpected fun and get to the bottom of some of the most important issues for true excellence in anything you do."e;— TOM MORRIS, Author of such books as If Aristotle Ran General Motors, Superheroes and Philosophy, and The Oasis Within"e;…This compelling story helps the reader think differently about one's self and others. In the process, Kahn achieves what every great author dreams of, namely, writing a book that drives personal and professional change."e;— ORRIN WOODWARD, Guinness World Record Holder, Inc Magazine Top 20 Leader and NY Times Bestselling Author

Increasingly popular as a self-defence method and fitness program, Krav Maga is the Israeli military's renowned method for fending off attackers. Based on the principles of doing minimal harm and enhancing our natural instincts for self-protection, anyone can master its moves - regardless of strength, size, age or gender. In this excellent beginner's guide David Khan presents the basic techniques and principles. Topics include: Anticipating an attack; Understanding the bodies vulnerable targets; Mastering essential defence techniques, and more

This book recounts the desperate efforts to gather information during World War II and the Cold War. The author provides insight into the dark realm of intelligence and code that will fascinate cryptographers, intelligence personnel, and the millions of people interested in military history, espionage adventure, and world affairs. David Kahn is universally regarded as the dean of intelligence historians. Authoritative and addictively readable, this book, by revealing the past, helps guide present and future intelligence efforts.

David Kahn, author of Krav Maga and Advanced Krav Maga, is back again with KRAV MAGA Defence: The Twelve Most Common Unarmed Street Attacks. Created by the Israeli army for self-defence, Krav Maga is gaining popularity around the world, especially here in the US. Kahn is a self-defence expert, teacher, and board member of the Israeli Krav Maga Association. Through photos, Kahn will teach you how to gain the upper hand in the twelve most common unarmed street attacks the average person is likely to encounter. He'll show you how to out-maneuver take downs, rear chokes, ambush attacks, sucker punches while texting, and knees to the groin, among other things. Kahn has instructed everyone from members at the local Y to executives, celebrities, and all major federal US. law enforcement agencies, as well as all four branches of the US military. His simple, no-nonsense approach to self- defence is perfect for men and women of all fitness levels. Don't become tomorrow's headline; Krav Maga Defence will teach you to protect yourself today.

The magnificent, unrivaled history of codes and ciphers -- how they''re made, how they''re broken, and the many and fascinating roles they''ve played since the dawn of civilization in war, business, diplomacy, and espionage -- updated with a new chapter on computer cryptography and the Ultra secret.Man has created codes to keep secrets and has broken codes to learn those secrets since the time of the Pharaohs. For 4,000 years, fierce battles have been waged between codemakers and codebreakers, and the story of these battles is civilization''s secret history, the hidden account of how wars were won and lost, diplomatic intrigues foiled, business secrets stolen, governments ruined, computers hacked. From the XYZ Affair to the Dreyfus Affair, from the Gallic War to the Persian Gulf, from Druidic runes and the kaballah to outer space, from the Zimmermann telegram to Enigma to the Manhattan Project, codebreaking has shaped the course of human events to an extent beyond any easy reckoning. Once a government monopoly, cryptology today touches everybody. It secures the Internet, keeps e-mail private, maintains the integrity of cash machine transactions, and scrambles TV signals on unpaid-for channels. David Kahn''s The Codebreakers takes the measure of what codes and codebreaking have meant in human history in a single comprehensive account, astonishing in its scope and enthralling in its execution. Hailed upon first publication as a book likely to become the definitive work of its kind, The Codebreakers has more than lived up to that prediction: it remains unsurpassed. With a brilliant new chapter that makes use of previously classified documents to bring the book thoroughly up to date, and to explore the myriad ways computer codes and their hackers are changing all of our lives, The Codebreakers is the skeleton key to a thousand thrilling true stories of intrigue, mystery, and adventure. It is a masterpiece of the historian''s art.

Spies, secret messages, and military intelligence have fascinated readers for centuries but never more than today, when terrorists threaten America and society depends so heavily on communications. Much of what was known about communications intelligence came first from David Kahn's pathbreaking book, The Codebreakers. Kahn, considered the dean of intelligence historians, is also the author of Hitler’s Spies: German Military Intelligence in World War II and Seizing the Enigma: The Race to Break the German U-Boat Codes, 1939-1943, among other books and articles.Kahn’s latest book, How I Discovered World War II's Greatest Spy and Other Stories of Intelligence and Code, provides insights into the dark realm of intelligence and code that will fascinate cryptologists, intelligence personnel, and the millions interested in military history, espionage, and global affairs. It opens with Kahn telling how he discovered the identity of the man who sold key information about Germany’s Enigma machine during World War II that enabled Polish and then British codebreakers to read secret messages.Next Kahn addresses the question often asked about Pearl Harbor: since we were breaking Japan’s codes, did President Roosevelt know that Japan was going to attack and let it happen to bring a reluctant nation into the war? Kahn looks into why Nazi Germany’s totalitarian intelligence was so poor, offers a theory of intelligence, explicates what Clausewitz said about intelligence, tells—on the basis of an interview with a head of Soviet codebreaking—something about Soviet Comint in the Cold War, and reveals how the Allies suppressed the second greatest secret of WWII.Providing an inside look into the efforts to gather and exploit intelligence during the past century, this book presents powerful ideas that can help guide present and future intelligence efforts. Though stories of WWII spying and codebreaking may seem worlds apart from social media security, computer viruses, and Internet surveillance, this book offers timeless lessons that may help today’s leaders avoid making the same mistakes that have helped bring at least one global power to its knees.The book includes a Foreword written by Bruce Schneier.

This book recounts the desperate efforts to gather information during World War II and the Cold War. The author provides insight into the dark realm of intelligence and code that will fascinate cryptographers, intelligence personnel, and the millions of people interested in military history, espionage adventure, and world affairs. David Kahn is universally regarded as the dean of intelligence historians. Authoritative and addictively readable, this book, by revealing the past, helps guide present and future intelligence efforts.

For almost four desperate years, from 1939 to the middle of 1943, the British and, in time, American navies fought a savage, losing battle against German U-boat wolf-packs. The Allies might never have turned the tide without an intelligence coup. The race to break the German U-boat codes is one of the greatest untold stories of the Second World War. Kahn expertly brings this tale to life in this updated edition of his classic book. Soon after war broke out, Hitler s U-boats began to sever Allied lifelines. In the grey wasteland of the North Atlantic, submarines prowled; at night, the sky lit up with the flames of torpedoed and sinking merchant ships and tankers. To meet the growing crisis, ingenious amateurs joined the nucleus of dedicated professionals at Bletchley Park. As the Battle of the Atlantic raged, they raced to unlock the continually changing German naval codes. Their mission: to read the U-boat messages of Hitler s cipher device, the Enigma. Critical to their success was a series of raids at sea. U-110, captured intact in the mid-Atlantic, yielded an example of the Enigma machine itself as well as a trove of secret documents.The weather ship Lauenburg, seized near the Arctic ice pack, provided code-settings for an entire month.In the Mediterranean, two sailors rescued a German weather cipher than enabled the team at Bletchley to solve the Enigma after a year-long blackout.

Winner - 2013 USA Best Books AwardWinner - 2013 IP's Book Award Finalist - 2013 Book of the Year Award by ForeWord Magazine Regardless of strength, size, age, or gender, you can learn krav maga techniques to fend off an armed attacker. Israeli Krav Maga is the Israel Defense Force's official self-defense system. The system is simple, instinctive, adaptable, and if necessary, brutally effective to thwart a life threatening assault. Krav maga is particularly world renowned for its weapon defenses. This book presents the most up-to-date and effective techniques to prevail against armed threats and attacks. These techniques are incorporated into the green, blue, brown, and black belt levels of the Israeli krav maga curriculum. Many of these updated defenses have never been seen before. Grandmaster Haim Gidon has improved and evolved this material with the late krav maga founder Imi Lichtenfeld's formal approval.Contents include these important topics: *Weapon awareness training; functionality, range, and deployment*Dominant control holds over a stunned assailant*Edged weapon defenses*Impact weapon defenses*Handgun defenses*Rifle defenses*Defending against weapons while on the ground*Defending against continuous attacks*Non-conventional weapon threats*First-party hostage situations*Kravist weapon defense drills The conditioning and hand-eye coordination achieved by practicing these techniques will tone your muscles, improve your reflexes, and get you street prepared. This is the most up-to-date, authoritative, and advanced guide to the world's premier weapons defense tactics.

WINNER - Sports, 2016 Best Books Award BECAUSE NOT ALL KRAV MAGA IS THE SAME TM Israeli krav maga is the official self-defense system of the Israel Defense Forces. Krav maga training shares the same principles for civilians, law enforcement, and military personnel alike to deliver them from harm's way. Goals however, are different for law enforcement and military personnel. This book is designed for security-conscious civilians, law enforcement officers, military personnel, and security professionals alike who want to improve their chances of not just surviving an armed attack, but increase the odds of prevailing without serious injury. Krav maga's popularity in professional law enforcement, military, and security circles is attributable to its practicality, simplicity, quick retention, easy learning curve, and brutal effectiveness. This effectiveness is built on a few core tenets and simple building blocks. General principles are applied and customized to suit the needs of a dynamic violent situation.Contents include: *Mind-sets, reactions, and tactics in response to violence*The highest-level counters against multiple armed attacks and threats*Core kick, clinch, and tackle defenses*Core ground survival tactics*Multiple-opponent strategies and tactics*Impact weapon defenses*Edged weapon defenses*Firearm disarms and retention*Includes 954 detailed photographs The most up-to-date tactics presented in this book focus on the most common violent scenarios. These techniques derive from the author's translation of the Israeli Krav Maga Association (IKMA) curriculum. The IKMA is the governing body for krav maga, recognized by the Israeli government and headed by Grandmaster Haim Gidon. Responsible people seek krav maga training as a shield against violence.

BECAUSE NOT ALL KRAV MAGA IS THE SAME®This book is designed for krav maga trainees, security-conscious civilians, law enforcement officers, security professionals, and military personnel alike who wish to refine their essential krav maga combatives, improve their chances of surviving a hostile attack and prevail without serious injury.Combatives are the foundation of krav maga counter-attacks. These are the combatives of the original Israeli Krav Maga Association (Grandmaster Gidon). It is irrefutable that you need only learn a few core combatives to be an effective fighter. Simple is easy. Easy is effective. Effective is what is required to end a violent encounter quickly, decisively, and on your terms. This book stresses doing the right things and doing them in the right way. Right technique + Correct execution = Maximum Effect.Contents include:Key strategies for achieving maximum combative effectsKrav maga’s 12 most effective combativesDeveloping power and balanceCombatives for the upper and lower bodyCombative combinations and retzev (continuous combat motion)Combatives for takedowns and throwsCombatives for armbars, leglocks, and chokesWhatever your martial arts or defensive tactics background or if you have no self-defense background at all, this book can add defensive combatives and combinations to your defensive repertoire. Our aim is to build a strong self-defense foundation through the ability to optimally counter-attack.

BECAUSE NOT ALL KRAV MAGA IS THE SAME®This book introduces and codifies big-picture thinking to take you to the next level of self-defense expertise. The material is designed to conform to your strengths; you need not conform to the system.In this latest volume from David Kahn, you will find practical, battle-tested stratagems and insights that are equally applicable across the spectrum of martial arts and fighting systems. The text is supported by 180 dynamic separate photo series representing a rich krav maga gamut of self-defense strategies and tactics.Topics include:The Best Use of a Training PartnerThe Difference Between Anger and RageRecognizing Your Own Triggers to Avoid ViolenceContending with Road RageConflict Avoidance and EscapePhysiological Reactions to Threats and ViolenceLegal Use of Force RequirementsDefensive (Dis)Engagement MindsetAnatomical Targeting and Self-ProtectionPreemptive Linear StrikesAbsorbing and Moving with an AttackFighting RangesCombatives Power and BalanceSelf-Defense Fight TimingTactical RetreatingWhen and How to CounterattackDefending against a Skilled FighterDeceptive FightingGround SurvivalDefending an AmbushMultiple OpponentsBreaking Up a FightAs good tactical minds generally think alike, whatever your martial arts or defensive tactics background, this book is designed to synergize any previous professional self-defense knowledge to enhance your personal survival blueprint.Krav Maga Fundamental Strategies draws on ideas and techniques from nearly every level of the Israeli Krav Maga curriculum, including violence avoidance and prevention. The result is an adaptable strategy supported by tried and true defensive tactics, coupled with sound defensive principles, all of which will serve to deliver you from harm’s way.

BECAUSE NOT ALL KRAV MAGA IS THE SAME®Hardcover format includes all photos in FULL COLOR!Israeli Krav Maga is the Israel Defense Force's official self-defense system. The system is simple, instinctive, adaptable, and if necessary, brutally effective to thwart a life threatening assault. This book presents the most up-to-date and effective techniques to prevail against armed threats and attacks.Many of these updated defenses have never been seen before. Grandmaster Haim Gidon has improved and evolved this material with the late krav maga founder Imi Lichtenfeld's formal approval.Contents includeWeapon awareness training; functionality, range, and deploymentDominant control holds over a stunned assailantEdged weapon defensesImpact weapon defensesHandgun defensesRifle defensesDefending against weapons while on the groundDefending against continuous attacksNon-conventional weapon threatsFirst-party hostage situationsKravist weapon defense drillsRegardless of strength, size, age, or gender, you can learn krav maga techniques to fend off an armed attacker.

BECAUSE NOT ALL KRAV MAGA IS THE SAME ™Hardcover format includes all photos in FULL COLOR!Israeli krav maga is the official self-defense system of the Israel Defense Forces. Krav maga training shares the same principles for civilians, law enforcement, and military personnel alike to deliver them from harm's way. Goals however, are different for law enforcement and military personnel.This book is designed for security-conscious civilians, law enforcement officers, military personnel, and security professionals alike who want to improve their chances of not just surviving an armed attack, but increase the odds of prevailing without serious injury.Krav maga's popularity in professional law enforcement, military, and security circles is attributable to its practicality, simplicity, quick retention, easy learning curve, and brutal effectiveness. This effectiveness is built on a few core tenets and simple building blocks. General principles are applied and customized to suit the needs of a dynamic violent situation.Contents include:Mind-sets, reactions, and tactics in response to violenceThe highest-level counters against multiple armed attacks and threatsCore kick, clinch, and tackle defensesCore ground survival tacticsMultiple-opponent strategies and tacticsImpact weapon defensesEdged weapon defensesFirearm disarms and retentionIncludes 954 detailed photographsThe most up-to-date tactics presented in this book focus on the most common violent scenarios. These techniques derive from the author's translation of the Israeli Krav Maga Association (IKMA) curriculum. The IKMA is the governing body for krav maga, recognized by the Israeli government and headed by Grandmaster Haim Gidon.Responsible people seek krav maga training as a shield against violence.

BECAUSE NOT ALL KRAV MAGA IS THE SAME®Hardcover format includes all photos in FULL COLOR!This book is designed for krav maga trainees, security-conscious civilians, law enforcement officers, security professionals, and military personnel alike who wish to refine their essential krav maga combatives, improve their chances of surviving a hostile attack and prevail without serious injury.Combatives are the foundation of krav maga counter-attacks. These are the combatives of the original Israeli Krav Maga Association (Grandmaster Gidon). It is irrefutable that you need only learn a few core combatives to be an effective fighter. Simple is easy. Easy is effective. Effective is what is required to end a violent encounter quickly, decisively, and on your terms. This book stresses doing the right things and doing them in the right way. Right technique + Correct execution = Maximum Effect.Contents include:Key strategies for achieving maximum combative effectsKrav maga’s 12 most effective combativesDeveloping power and balanceCombatives for the upper and lower bodyCombative combinations and retzev (continuous combat motion)Combatives for takedowns and throwsCombatives for armbars, leglocks, and chokesWhatever your martial arts or defensive tactics background or if you have no self-defense background at all, this book can add defensive combatives and combinations to your defensive repertoire. Our aim is to build a strong self-defense foundation through the ability to optimally counter-attack.

BECAUSE NOT ALL KRAV MAGA IS THE SAME®Hardcover format includes all photos in FULL COLOR!This book introduces and codifies big-picture thinking to take you to the next level of self-defense expertise. The material is designed to conform to your strengths; you need not conform to the system.In this latest volume from David Kahn, you will find practical, battle-tested stratagems and insights that are equally applicable across the spectrum of martial arts and fighting systems. The text is supported by 180 dynamic separate photo series representing a rich krav maga gamut of self-defense strategies and tactics.Topics include:The Best Use of a Training PartnerThe Difference Between Anger and RageRecognizing Your Own Triggers to Avoid ViolenceContending with Road RageConflict Avoidance and EscapePhysiological Reactions to Threats and ViolenceLegal Use of Force RequirementsDefensive (Dis)Engagement MindsetAnatomical Targeting and Self-ProtectionPreemptive Linear StrikesAbsorbing and Moving with an AttackFighting RangesCombatives Power and BalanceSelf-Defense Fight TimingTactical RetreatingWhen and How to CounterattackDefending against a Skilled FighterDeceptive FightingGround SurvivalDefending an AmbushMultiple OpponentsBreaking Up a FightAs good tactical minds generally think alike, whatever your martial arts or defensive tactics background, this book is designed to synergize any previous professional self-defense knowledge to enhance your personal survival blueprint.Krav Maga Fundamental Strategies draws on ideas and techniques from nearly every level of the Israeli Krav Maga curriculum, including violence avoidance and prevention. The result is an adaptable strategy supported by tried and true defensive tactics, coupled with sound defensive principles, all of which will serve to deliver you from harm’s way.

For almost four desperate years, from 1939 to mid-1943, the British and American navies fought a savage, losing battle against German submarine wolfpacks. The Allies might never have turned the tide without an intelligence coup. The race to break the German U-boat codes is one of the greatest untold stories of World War II. Kahn expertly brings this tale to life in this newly-updated edition of his classic book.Soon after war broke out, Hitler’s U-boats began to sever Allied lifelines. In the gray wasteland of the North Atlantic, submarines prowled; at night, the sky lit up with the flames of exploding tankers. To meet the growing crisis, ingenious amateurs joined the nucleus of dedicated professionals at Bletchley Park. As the Battle of the Atlantic raged, they raced to unlock the continually changing German naval codes. Their mission: to read the U-boat messages of Hitler’s cipher device, the Enigma.Critical to their success was a series of raids at sea. U-110, captured intact in the mid-Atlantic, yielded the Enigma machine itself and also a trove of secret documents. The weather ship Lauenburg seized near the Arctic ice pack provided codesettings for an entire month. In the Mediterranean, two sailors rescued a German weather cipher than enabled the team at Bletchley to solve the Enigma after a year-long blackout.