Secret and Urgent PDF Download

Author: Fletcher Pratt
Publisher: Indianapolis : Bobbs-Merrill Company
ISBN:
Category : Ciphers
Languages : en
Pages : 302

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Book Description

Author: Anon
Publisher: Read Books Ltd
ISBN: 1528764811
Category : History
Languages : en
Pages : 277

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Book Description
Many of the earliest books, particularly those dating back to the 1900s and before, are now extremely scarce and increasingly expensive. We are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.

Author: Ralph E. Weber
Publisher: Routledge
ISBN: 1351316184
Category : Business & Economics
Languages : en
Pages : 835

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Book Description
United States Diplomatic Codes and Ciphers, 1775-1938 is the first basic reference work on American diplomatic cryptography. Weber's research in national and private archives in the Americas and Europe has uncovered more than one hundred codes and ciphers. Beginning with the American Revolution, these secret systems masked confidential diplomatic correspondence and reports.During the period between 1775 and 1938, both codes and ciphers were employed. Ciphers were frequently used for American diplomatic and military correspondence during the American Revolution. At that time, a system was popular among American statesmen whereby a common book, such as a specific dictionary,was used by two correspondents who encoded each word in a message with three numbers. In this system, the first number indicated the page of the book, the second the line in the book, and the third the position of the plain text word on that line counting from the left. Codes provided the most common secret language basis for the entire nineteenth century.Ralph Weber describes in eight chapters the development of American cryptographic practice. The codes and ciphers published in the text and appendix will enable historians and others to read secret State Department dispatches before 1876, and explain code designs after that year.

Author: Simon Singh
Publisher: Delacorte Press
ISBN: 0375890122
Category : Young Adult Nonfiction
Languages : en
Pages : 274

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Book Description
"As gripping as a good thriller." --The Washington Post Unpack the science of secrecy and discover the methods behind cryptography--the encoding and decoding of information--in this clear and easy-to-understand young adult adaptation of the national bestseller that's perfect for this age of WikiLeaks, the Sony hack, and other events that reveal the extent to which our technology is never quite as secure as we want to believe. Coders and codebreakers alike will be fascinated by history's most mesmerizing stories of intrigue and cunning--from Julius Caesar and his Caeser cipher to the Allies' use of the Enigma machine to decode German messages during World War II. Accessible, compelling, and timely, The Code Book is sure to make readers see the past--and the future--in a whole new way. "Singh's power of explaining complex ideas is as dazzling as ever." --The Guardian

Author: Martin Gardner
Publisher: Courier Corporation
ISBN: 9780486247618
Category : Juvenile Nonfiction
Languages : en
Pages : 100

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Book Description
Explains various methods used in cryptography and presents examples to help readers in breaking secret codes

Author: Samuel Steward
Publisher: University of Chicago Press
ISBN: 022630468X
Category : History
Languages : en
Pages : 263

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Book Description
Samuel Steward (1909-93) was an English professor, a tattoo artist for the Hells Angels, a sexual adventurer who shared his considerable range of experiences with Alfred Kinsey, and a prolific writer of everything from scholarly articles to gay erotica (under the penname Phil Andros). Given this biography, he sounds like a most unlikely contributor to a trade magazine like the Illinois Dental Journal.

Author: Alan Baddeley
Publisher: Routledge
ISBN: 1317238524
Category : Psychology
Languages : en
Pages : 553

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Book Description
Technological developments during the Second World War led to an approach that linked ideas from computer science to neuroscience, linguistics, philosophy and psychology, known today as the Cognitive Revolution. Leaving behind traditional behaviourist approaches popular at the time, psychology began to utilise artificial intelligence and computer science to develop testable theories and design groundbreaking new experiments. The Cognitive Revolution dramatically changed the way that psychological research and studies were conducted and proposed a new way of thinking about the mind. In Working Memories, Alan Baddeley, one of the world's leading authorities on Human Memory, draws on his own personal experience of this time, recounting the radical development of a pioneering science in parallel with his own transatlantic, vibrant and distinguished career. Detailing the excitement and sometimes frustration experienced in taking psychology into the world beyond the laboratory, Working Memories presents unique insights into the mind and psychological achievements of one of the most influential psychologists of our time.

Author: Frederick Wilse Bateson
Publisher: CUP Archive
ISBN:
Category : English literature
Languages : en
Pages : 736

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Book Description

Author: Alexander Rose
Publisher: Bantam
ISBN: 055339259X
Category : History
Languages : en
Pages : 402

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Book Description
NEW YORK TIMES BESTSELLER • Turn: Washington’s Spies, now an original series on AMC Based on remarkable new research, acclaimed historian Alexander Rose brings to life the true story of the spy ring that helped America win the Revolutionary War. For the first time, Rose takes us beyond the battlefront and deep into the shadowy underworld of double agents and triple crosses, covert operations and code breaking, and unmasks the courageous, flawed men who inhabited this wilderness of mirrors—including the spymaster at the heart of it all. In the summer of 1778, with the war poised to turn in his favor, General George Washington desperately needed to know where the British would strike next. To that end, he unleashed his secret weapon: an unlikely ring of spies in New York charged with discovering the enemy’s battle plans and military strategy. Washington’s small band included a young Quaker torn between political principle and family loyalty, a swashbuckling sailor addicted to the perils of espionage, a hard-drinking barkeep, a Yale-educated cavalryman and friend of the doomed Nathan Hale, and a peaceful, sickly farmer who begged Washington to let him retire but who always came through in the end. Personally guiding these imperfect everyday heroes was Washington himself. In an era when officers were gentlemen, and gentlemen didn’ t spy, he possessed an extraordinary talent for deception—and proved an adept spymaster. The men he mentored were dubbed the Culper Ring. The British secret service tried to hunt them down, but they escaped by the closest of shaves thanks to their ciphers, dead drops, and invisible ink. Rose’s thrilling narrative tells the unknown story of the Revolution–the murderous intelligence war, gunrunning and kidnapping, defectors and executioners—that has never appeared in the history books. But Washington’s Spies is also a spirited, touching account of friendship and trust, fear and betrayal, amid the dark and silent world of the spy.

Author: James A. Reeds
Publisher: John Wiley & Sons
ISBN: 1119061628
Category : Computers
Languages : en
Pages : 788

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Book Description
This book is an edition of the General Report on Tunny with commentary that clarifies the often difficult language of the GRT and fitting it into a variety of contexts arising out of several separate but intersecting story lines, some only implicit in the GRT. Explores the likely roots of the ideas entering into the Tunny cryptanalysis Includes examples of original worksheets, and printouts of the Tunny-breaking process in action Presents additional commentary, biographies, glossaries, essays, and bibliographies