Codes, Ciphers and Secret Writing (Dover Puzzle Books) free ebook download.

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Codes, Ciphers and Secret Writing (Dover Puzzle Books) free ebook download

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Mathematics

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Author(s):	Martin Gardner

Date:	2021	Format:	pdf	Language:	English	ISBN/ASIN:	0486247619
Pages:	96	OCR:		Quality:		ISBN13:
Uploader:	eternal	Upload Date:	8/1/2023 7:57:00 PM

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0486247619 pdf
"A fascinating, challenging book."  A.L.A. Booklist
Learn to use the most important codes and methods of secret communication in use since ancient times. Cipher and decipher codes used by spies. Explore the famous codes that changed the fate of nations and political leaders. And enjoy hours of fun experimenting with cryptography  the science of secret writing.
Beginning with simple letter substitutions and transposition ciphers, world-famous science writer Martin Gardner explains how to break complicated polyalphabetical ciphers and codes worked with grids, squares, triangles, and charts. You'll learn codes that are keyed to typewriters and telephone dials . . . even codes that use playing cards, knots, and swizzle sticks. Experiment with invisible writing  inks that glow in black light and turn red under heat  and explore the possibilities of sending messages through outer space to unknown worlds.
Using this book, you can solve the historically famous Playfair Cipher used by Australia in World War II, the Pigpen Cipher used by Confederate soldiers during the Civil War, Thomas Jefferson's Wheel Cipher, the Beaufort system used by the British Royal Navy, codes devised by authors for heroes in literature  Sherlock Holmes, Captain Kidd, and the Shadow. And you will enjoy experimenting with bizarre methods of message sending  the Dot Code, Knot Code, Swizzle Code, and more.
Young cryptanalysts, cipher fans, and puzzlists of all ages will find hours of intrigue and challenge in
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	Title	Link	Password	Size (MB)	Thank to	Inform Admin
3189859	Book	https://nitroflare.com/view/2D020E0E8A40...		0.00	eternal

Tags: Books Ciphers Codes Dover Puzzle Secret Writing

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