Codes and Ciphers

Author: Collins Uk
Publisher: Harper Uk
ISBN: 9780007228041
Format: PDF, ePub, Mobi
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Covering the history of the development of codes and ciphers, this book also includes practical information and advice on how to make codes and how to break them. It touches on everything from the smoke signals used by Native American Indians to encryption devices used by government agencies and the military.

Codes and Ciphers

Author: Sean Callery
Publisher: Collins
ISBN: 9780007228034
Format: PDF, Docs
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This volume is a history of the development of codes and ciphers, and information and advice on how to make codes (whether by pencil and paper, or by computer) and how to break codes. The topics covered include: Native American smoke signals; Morse code, Braille, ASCII computer language; letter substitution; and many more.

XCalibur

Author: David Morgan Williams
Publisher: Y Lolfa
ISBN: 184771823X
Format: PDF, ePub, Mobi
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A fantasy thriller for 9 to 12 year olds. This is the third book in The Spirit of the Dragon trilogy. Huw finds himself back in time in the year 590 AD but travels further back with his friends to meet Qin, the first Emperor of China, using a powerful talisman in his attempts to overcome evil forces.

Cryptography A Very Short Introduction

Author: Fred Piper
Publisher: OUP Oxford
ISBN: 0191577758
Format: PDF, ePub, Docs
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This book is a clear and informative introduction to cryptography and data protection - subjects of considerable social and political importance. It explains what algorithms do, how they are used, the risks associated with using them, and why governments should be concerned. Important areas are highlighted, such as Stream Ciphers, block ciphers, public key algorithms, digital signatures, and applications such as e-commerce. This book highlights the explosive impact of cryptography on modern society, with, for example, the evolution of the internet and the introduction of more sophisticated banking methods. ABOUT THE SERIES: The Very Short Introductions series from Oxford University Press contains hundreds of titles in almost every subject area. These pocket-sized books are the perfect way to get ahead in a new subject quickly. Our expert authors combine facts, analysis, perspective, new ideas, and enthusiasm to make interesting and challenging topics highly readable.

Battle of Wits

Author: Stephen Budiansky
Publisher: Simon and Schuster
ISBN: 0684859327
Format: PDF, Mobi
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A million pages of new World War II codebreaking records have been released by the U.S. Army and Navy and the British government over the last five years. Now, Battle of Wits presents the history of the war that these documents reveal. From the Battle of Midway until the last German code was broken in January 1945, this is an astonishing epic of a war that was won not simply by brute strength but also by reading the enemy's intentions. The revelations of Stephen Budiansky's dramatic history include how Britain tried to manipulate the American codebreakers and monopolize German Enigma code communications; the first detailed published explanations of how the Japanese codes were broken; and how the American codebreaking machines worked to crack the Japanese, the German, and even the Russian diplomatic codes. This is the story of the Allied codebreakers puzzling through the most difficult codebreaking problems that ever existed. At the same time, the compelling narrative shows the crucial effect codebreaking had on the battle-fields by explaining the urgency of stopping the wolf pack U-boat attacks in the North Atlantic, the burning desire in the United States to turn the tide of the war after Pearl Harbor, the importance of halting Rommel's tanks in North Africa, and the necessity of ensuring that the Germans believed the Allies' audacious deception and cover plans for D-Day. Budiansky brings to life the unsung code-breaking heroes of this secret war: Joseph J. Rochefort, an intense and driven naval officer who ran the codebreaking operation in "The Dungeon", a dank basement at Pearl Harbor, that effectively won the Battle of Midway; Alan Turing, the eccentric father of the computerage, whose brilliant electromechanical calculators broke the German Enigma machine; and Ian Fleming, whose daredevil espionage schemes to recover codebooks resembled the plots of the 007 novels he later wrote. Among the villains, we meet the Nazi Admiral Donitz, who led the submarine wolf packs against Allied shipping in the North Atlantic with horrific casualty rates -- until the codebreakers stopped him. Budiansky, a Harvard-trained mathematician, demonstrates the mathematical insight and creativity of the cryptographers by showing step-by-step precisely how the codes were broken. This technology -- the flow of information, its encryption, and the computational methods of recovering it from the enemy -- had never before been so important to the outcome of a war. Informative diagrams, maps, appendices, and photographs show exactly how, why, and where the secret war was won. Unveiled for the first time, the complete story of codebreaking in World War II has now been told.

Between Silk and Cyanide

Author: Leo Marks
Publisher: The History Press
ISBN: 0752471600
Format: PDF, Docs
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In 1942, with a black-market chicken under his arm, Leo Marks left his father's famous bookshop, 84 Charing Cross Road, and went to war. He was twenty-two and a cryptopgraher of genius. In Between Silk and Cyanide, his critically acclaimed account of his time in SOE, Marks tells how he revolutionised the code-making techniques of the Allies, trained some of the most famous agents dropped into France including Violette Szabo and 'the White Rabbit', and why he wrote haunting verse including his 'The Life that I have' poem. He reveals for the first time the disastrous dimensions of the code war between SOE and the Germans in Holland; how the Germans were fooled into thinking a Secret Army was operating in the Fatherland itself, and how and why he broke General de Gaulle's secret code. Both thrilling and poignant, Marks's book is truly one of the last great Second World War memoirs.

The Dangerous Book for Boys

Author: Conn Iggulden
Publisher: Zondervan
ISBN: 0061243582
Format: PDF, Docs
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The bestselling book for every boy from eight to eighty, covering essential boyhood skills such as building tree houses*, learning how to fish, finding true north, and even answering the age old question of what the big deal with girls is. In this digital age there is still a place for knots, skimming stones and stories of incredible courage. This book recaptures Sunday afternoons, stimulates curiosity, and makes for great father-son activities. The brothers Conn and Hal have put together a wonderful collection of all things that make being young or young at heart fun—building go-carts and electromagnets, identifying insects and spiders, and flying the world's best paper airplanes. The completely revised American Edition includes: The Greatest Paper Airplane in the World The Seven Wonders of the Ancient World The Five Knots Every Boy Should Know Stickball Slingshots Fossils Building a Treehouse* Making a Bow and Arrow Fishing (revised with US Fish) Timers and Tripwires Baseball's "Most Valuable Players" Famous Battles-Including Lexington and Concord, The Alamo, and Gettysburg Spies-Codes and Ciphers Making a Go-Cart Navajo Code Talkers' Dictionary Girls Cloud Formations The States of the U.S. Mountains of the U.S. Navigation The Declaration of Independence Skimming Stones Making a Periscope The Ten Commandments Common US Trees Timeline of American History * For more information on building treehouses, visit www.treehouse-books.com and www.stilesdesigns.com or see "Treehouses You Can Actually Build" by David Stiles