Secret Codes


Book Description




Codes, Ciphers and Secret Writing


Book Description

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


Book Description

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.




The Book of Codes


Book Description

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.




Secrets, Signs, Signals & Codes


Book Description

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




Making Secret Codes and Messages


Book Description

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.




Top Secret


Book Description

Presents history, trivia, and code-breaking tales in a guide book to the world of secret writing that includes examples of a variety of codes and ciphers.




Destroy After Reading


Book Description

Presents an overview of various types of codes and ciphers used throughout history, famous cryptologists, and how to create your own secret messages.