Secret and Urgent PDF Download

Author: Fletcher Pratt
Publisher:
ISBN: 9780894122613
Category : Ciphers
Languages : en
Pages : 0

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Book Description

Author: Rachael L. Thomas
Publisher: Lerner Publications ™
ISBN: 1728433630
Category : Juvenile Nonfiction
Languages : en
Pages : 32

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Book Description
Dive into the secret history of . . . secrets! Cryptology is the art and science of secret communication, and its purpose is to protect precious information and keep people safe. Learn about its building blocks: ciphers, codes, and keys. People have wanted to hide messages and important information for millennia. Read how history's coolest codes and ciphers have progressed from belts and sticks to rotating disks and supercomputers. Use your cryptology skills to design your own secret cipher. And learn about the smart people who built and broke the strongest secret systems.

Author: R. F. Churchhouse
Publisher: Cambridge University Press
ISBN: 9780521008907
Category : Business & Economics
Languages : en
Pages : 254

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Book Description
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Author: Alexander D'Agapeyeff
Publisher: Read Books Ltd
ISBN: 1473350913
Category : Computers
Languages : en
Pages : 153

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Book Description
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: Simon Singh
Publisher: Delacorte Press
ISBN: 0375890122
Category : Young Adult Nonfiction
Languages : en
Pages : 274

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Book Description
"As gripping as a good thriller." --The Washington Post Unpack the science of secrecy and discover the methods behind cryptography--the encoding and decoding of information--in this clear and easy-to-understand young adult adaptation of the national bestseller that's perfect for this age of WikiLeaks, the Sony hack, and other events that reveal the extent to which our technology is never quite as secure as we want to believe. Coders and codebreakers alike will be fascinated by history's most mesmerizing stories of intrigue and cunning--from Julius Caesar and his Caeser cipher to the Allies' use of the Enigma machine to decode German messages during World War II. Accessible, compelling, and timely, The Code Book is sure to make readers see the past--and the future--in a whole new way. "Singh's power of explaining complex ideas is as dazzling as ever." --The Guardian

Author: Janet Beissinger
Publisher: CRC Press
ISBN: 1498747760
Category : Mathematics
Languages : en
Pages : 216

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Book Description
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: Helen F. Gaines
Publisher: Courier Corporation
ISBN: 0486200973
Category : Computers
Languages : en
Pages : 260

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Book Description
Includes "166 cryptograms."

Author: Martin Gardner
Publisher: Courier Corporation
ISBN: 9780486247618
Category : Juvenile Nonfiction
Languages : en
Pages : 100

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Book Description
Explains various methods used in cryptography and presents examples to help readers in breaking secret codes

Author: Laurence Dwight Smith
Publisher: Courier Corporation
ISBN: 9780486202471
Category : Business & Economics
Languages : en
Pages : 180

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Book Description
Explains transposition, substitution, and Baconian bilateral ciphers and presents more than one hundred and fifty problems.

Author: Richard Klima
Publisher: CRC Press
ISBN: 1351692534
Category : Computers
Languages : en
Pages : 372

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Book Description
Cryptology: Classical and Modern, Second Edition proficiently introduces readers to the fascinating field of cryptology. The book covers classical methods including substitution, transposition, Playfair, ADFGVX, Alberti, Vigene re, and Hill ciphers. It also includes coverage of the Enigma machine, Turing bombe, and Navajo code. Additionally, the book presents modern methods like RSA, ElGamal, and stream ciphers, as well as the Diffie-Hellman key exchange and Advanced Encryption Standard. When possible, the book details methods for breaking both classical and modern methods. The new edition expands upon the material from the first edition which was oriented for students in non-technical fields. At the same time, the second edition supplements this material with new content that serves students in more technical fields as well. Thus, the second edition can be fully utilized by both technical and non-technical students at all levels of study. The authors include a wealth of material for a one-semester cryptology course, and research exercises that can be used for supplemental projects. Hints and answers to selected exercises are found at the end of the book.