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Author : Norma Gleason
Publisher : Courier Corporation
Page : 54 pages
File Size : 27,99 MB
Release : 1987-01-01
Category : Juvenile Nonfiction
ISBN : 9780486254050
Decode 68 secret messages—backward ciphers, false word divisions, null ciphers and much more with this fascinating, fun-filled book. Solutions.
Author : Martin Gardner
Publisher : Courier Corporation
Page : 100 pages
File Size : 43,43 MB
Release : 1984-01-01
Category : Juvenile Nonfiction
ISBN : 9780486247618
Explains various methods used in cryptography and presents examples to help readers in breaking secret codes
Author : Martin Gardner
Publisher : Courier Corporation
Page : 100 pages
File Size : 34,48 MB
Release : 2013-04-10
Category : Games & Activities
ISBN : 0486320316
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.
Author : Norma Gleason
Publisher :
Page : pages
File Size : 15,40 MB
Release : 1987-07-01
Category :
ISBN : 9780613943901
Decode 68 secret messages--backward ciphers, false word divisions, null ciphers and much more with this fascinating, fun-filled book. Solutions.
Author : Bud Johnson
Publisher : Courier Corporation
Page : 86 pages
File Size : 14,59 MB
Release : 2013-05-22
Category : Juvenile Nonfiction
ISBN : 0486291464
Simply and clearly written book, filled with cartoons and easy-to-follow instructions, tells youngsters 8 and up how to break 6 different types of coded messages. Examples and solutions.
Author : Paul B. Janeczko
Publisher : Candlewick Press
Page : 148 pages
File Size : 42,20 MB
Release : 2006-04-11
Category : Juvenile Nonfiction
ISBN : 9780763629724
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.
Author : Alexander D'Agapeyeff
Publisher : Read Books Ltd
Page : 153 pages
File Size : 40,35 MB
Release : 2016-08-26
Category : Computers
ISBN : 1473350913
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.
Author : Janet Beissinger
Publisher : CRC Press
Page : 213 pages
File Size : 20,35 MB
Release : 2018-10-08
Category : Mathematics
ISBN : 1498747760
Join the Cryptokids as they apply basic mathematics to make and break secret codes. This book has many hands-on activities that have been tested in both classrooms and informal settings. Classic coding methods are discussed, such as Caesar, substitution, Vigenère, and multiplicative ciphers as well as the modern RSA. Math topics covered include: - Addition and Subtraction with, negative numbers, decimals, and percentages - Factorization - Modular Arithmetic - Exponentiation - Prime Numbers - Frequency Analysis. The accompanying workbook, The Cryptoclub Workbook: Using Mathematics to Make and Break Secret Codes provides students with problems related to each section to help them master the concepts introduced throughout the book. A PDF version of the workbook is available at no charge on the download tab, a printed workbook is available for $19.95 (K00701). The teacher manual can be requested from the publisher by contacting the Academic Sales Manager, Susie Carlisle
Author : Therese Maring
Publisher : American Girl
Page : 52 pages
File Size : 25,52 MB
Release : 2005-09
Category : Juvenile Nonfiction
ISBN : 9781593690182
"Learn 14 easy codes for sending secret messages to your friends! You'll also find fun practice messages to solve, Decoder cards you can tear out and share, and super-tiny Secret Strips for writing special note."--Cover back.
Author : Ella Schwartz
Publisher : Bloomsbury Publishing USA
Page : 129 pages
File Size : 24,78 MB
Release : 2019-03-26
Category : Juvenile Nonfiction
ISBN : 1681199890
Codes can carry big secrets! Throughout history, lots of good guys and lots of bad guys have used codes to keep their messages under wraps. This fun and flippable nonfiction features stories of hidden treasures, war-time maneuverings, and contemporary hacking as well as explaining the mechanics behind the codes in accessible and kid friendly forms. Sidebars call out activities that invite the reader to try their own hand at cracking and crafting their own secret messages. This is the launch of an exciting new series that invites readers into a STEM topic through compelling historical anecdotes, scientific backup, and DIY projects.