Codes, Ciphers and Secret Writing (Dover Children's Activity Books)

Codes, Ciphers and Secret Writing (Dover Children's Activity Books)

Martin Gardner


"A attention-grabbing, tough book." ― A.L.A. Booklist
Learn to exploit an important codes and techniques of mystery verbal exchange in use given that precedent days. Cipher and decipher codes utilized by spies. discover the recognized codes that modified the destiny of countries and political leaders. and revel in hours of enjoyable experimenting with cryptography ― the technological know-how of mystery writing.
Beginning with basic letter substitutions and transposition ciphers, world-famous technological know-how author Martin Gardner explains find out how to holiday advanced polyalphabetical ciphers and codes labored with grids, squares, triangles, and charts. you are going to research codes which are keyed to typewriters and mobile dials . . . even codes that use cards, knots, and swizzle sticks. test with invisible writing ― inks that glow in black gentle and switch crimson less than warmth ― and discover the chances of sending messages via outer house to unknown worlds.
Using this ebook, you could remedy the traditionally well-known Playfair Cipher utilized by Australia in global struggle II, the Pigpen Cipher utilized by accomplice squaddies throughout the Civil warfare, Thomas Jefferson's Wheel Cipher, the Beaufort process utilized by the British Royal army, codes devised by means of authors for heroes in literature ― Sherlock Holmes, Captain Kidd, and the Shadow. and you'll take pleasure in experimenting with strange tools of message sending ― the Dot Code, Knot Code, Swizzle Code, and extra.
Young cryptanalysts, cipher lovers, and puzzlists of every age will locate hours of intrigue and problem in Codes, Ciphers and mystery Writing.
"A stimulating needs to for the intermediate cryptographer." ― The Kirkus Reviews

Show sample text content

Download sample