Codes, Ciphers and Secret Writing
Codes, Ciphers and Secret Writing

Author: Martin Gardner

Publisher: Courier Corporation

Published: 2013-04-10

Total Pages: 100

ISBN-13: 0486320316

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Cipher and decipher codes: transposition and polyalphabetical ciphers, famous codes, typewriter and telephone codes, codes that use playing cards, knots, and swizzle sticks . . . even invisible writing and sending messages through space. 45 diagrams.

Code Cracking for Kids
Code Cracking for Kids

Author: Jean Daigneau

Publisher: Chicago Review Press

Published: 2019-10-01

Total Pages: 289

ISBN-13: 1641601418

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People throughout history have written messages in code and ciphers to guard and pass along closely held secret information. Today, countries around the world enlist cryptanalysts to intercept and crack messages to keep our world safe. Code Cracking for Kids explores many aspects of cryptology, including famous people who used and invented codes and ciphers, such as Julius Caesar and Thomas Jefferson; codes used during wars, including the Enigma machine, whose cracking helped the Allies gather critical information on German intelligence in World War II; and work currently being done by the government, such as in the National Security Agency. Readers also will learn about unsolved codes and ciphers throughout history, codes used throughout the world today, though not often recognized, and devices used over the years by governments and their spies to conceal information. Code Cracking for Kids includes hands-on activities that allow kids to replicate early code devices, learn several different codes and ciphers to encode and decode messages and hide a secret message inside a hollow egg.

Secrets, Signs, Signals & Codes
Secrets, Signs, Signals & Codes

Author: Shari Lewis

Publisher: Henry Holt Books For Young Readers

Published: 1980

Total Pages: 100

ISBN-13: 9780030497162

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Discusses codes, silent signals, invisible writing, and other ways to conceal messages.

The Book of Codes
The Book of Codes

Author: Paul Lunde

Publisher:

Published: 2009

Total Pages: 0

ISBN-13: 9780520260139

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This illustrated encyclopedia surveys the history and development of code-making and code-breaking in all areas of culture and society from hieroglyphs and runes to DNA, the Zodiac Killer, graffiti, and beyond.

Codes and Ciphers
Codes and Ciphers

Author: Sean Callery

Publisher: Harper Collins

Published: 2008-01-22

Total Pages: 196

ISBN-13: 0061374075

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Everything from smoke signals to military encryption devices Codes and Ciphers reveals the development and role of secret communications throughout history and offers practical advice on how to make codes (whether by pencil and paper or by computer) and how to break them! Inside you will find information on: Code-breaking devices Hieroglyphics, Native American smoke signals, flags, and semaphore Braille, Morse code, and computer language Mono- and polyalphabetic letter substitution Computer algorithms

Codes and Ciphers - A History of Cryptography
Codes and Ciphers - A History of Cryptography

Author: Alexander D'Agapeyeff

Publisher: Read Books Ltd

Published: 2016-08-26

Total Pages: 153

ISBN-13: 1473350913

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This vintage book contains Alexander D’Agapeyeff’s famous 1939 work, Codes and Ciphers - A History of Cryptography. Cryptography is the employment of codes and ciphers to protect secrets, and it has a long and interesting history. This fantastic volume offers a detailed history of cryptography from ancient times to modernity, written by the Russian-born English cryptographer, Alexander D'Agapeyeff. The contents include: - The beginnings of Cryptography - From the Middle Ages Onwards - Signals, Signs, and Secret Languages - Commercial Codes - Military Codes and Ciphers - Types of Codes and Ciphers - Methods of Deciphering Many antiquarian texts such as this, especially those dating back to the 1900s and before, are increasingly hard to come by and expensive, and it is with this in mind that we are republishing this book now in an affordable, modern, high quality edition. It comes complete with a specially commissioned new biography of the author.

Making Secret Codes and Messages
Making Secret Codes and Messages

Author: Deanna Caswell

Publisher: Hi Jinx Press

Published: 2018-07-31

Total Pages: 24

ISBN-13: 9781680725889

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The clandestine world of spies and spying is built upon countries attempting to be problem solvers...This is a STEM journey that teaches readers how to make secret codes and messages through clear steps, simple supply lists, and helpful tips and fun facts.