Codes and Ciphers

Author: R. F. Churchhouse
Publisher: Cambridge University Press
ISBN: 9780521008907
Format: PDF, Docs
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This book describes and analyses many cipher systems ranging from the earliest and most elementary to the most recent and sophisticated(RSA and DES).

Mathematical Ciphers

Author: Anne L. Young
Publisher: American Mathematical Soc.
ISBN: 0821837303
Format: PDF, Kindle
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A cipher is a scheme for creating coded messages for the secure exchange of information. Throughout history, many different coding schemes have been devised. One of the oldest and simplest mathematical systems was used by Julius Caesar. This is where Mathematical Ciphers begins. Building on that simple system, Young moves on to more complicated schemes, ultimately ending with the RSA cipher, which is used to provide security for the Internet. This book is structured differently from most mathematics texts. It does not begin with a mathematical topic, but rather with a cipher. The mathematics is developed as it is needed; the applications motivate the mathematics. As is typical in mathematics textbooks, most chapters end with exercises. Many of these problems are similar to solved examples and are designed to assist the reader in mastering the basic material. A few of the exercises are one-of-a-kind, intended to challenge the interested reader. Implementing encryption schemes is considerably easier with the use of the computer. For all the ciphers introduced in this book, JavaScript programs are available from the Web. In addition to developing various encryption schemes, this book also introduces the reader to number theory. Here, the study of integers and their properties is placed in the exciting and modern context of cryptology. Mathematical Ciphers can be used as a textbook for an introductory course in mathematics for all majors. The only prerequisite is high school mathematics.

Cryptography Made Simple

Author: Nigel Smart
Publisher: Springer
ISBN: 3319219367
Format: PDF
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In this introductory textbook the author explains the key topics in cryptography. He takes a modern approach, where defining what is meant by "secure" is as important as creating something that achieves that goal, and security definitions are central to the discussion throughout. The author balances a largely non-rigorous style — many proofs are sketched only — with appropriate formality and depth. For example, he uses the terminology of groups and finite fields so that the reader can understand both the latest academic research and "real-world" documents such as application programming interface descriptions and cryptographic standards. The text employs colour to distinguish between public and private information, and all chapters include summaries and suggestions for further reading. This is a suitable textbook for advanced undergraduate and graduate students in computer science, mathematics and engineering, and for self-study by professionals in information security. While the appendix summarizes most of the basic algebra and notation required, it is assumed that the reader has a basic knowledge of discrete mathematics, probability, and elementary calculus.

The Code Book The Secrets Behind Codebreaking

Author: Simon Singh
Publisher: Delacorte Books for Young Readers
ISBN: 9780375890123
Format: PDF, Mobi
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"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

The Mammoth Book of Secret Codes and Cryptograms

Author: Elonka Dunin
Publisher: Running PressBook Pub
ISBN: 9780786717262
Format: PDF, ePub, Mobi
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Secret messages, encoded predictions, cryptic clues -- never have cryptogram puzzles been so popular, fueled by phenomena like "The Da Vinci Code" and "Bible Code." From award-winning cryptographer and game developer Elonka Dunin, here is a major new collection of brain teasing cryptograms and other enciphered challenges to satisfy every level of puzzle aficionado. "The Mammoth Book of Secret Codes and Cryptograms" contains over 400 encoded puzzles, ranging from easy substitution puzzles and messages or quotations in code where each letter stands for another, to fiendishly difficult ciphers. This book also includes helpful tips and pointers, plus famous unsolved real-world cryptograms like the Dorabella cipher, Kryptos fourth section, Zodiac killer ciphers, Linear A, and Rongorongo script to ensure that the challenge never ends.

Unsolved

Author: Craig P. Bauer
Publisher: Princeton University Press
ISBN: 1400884799
Format: PDF, ePub
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Watch Craig Bauer discuss the Zodiac Killer’s cipher on HISTORY’s new miniseries The Hunt for the Zodiac Killer In 1953, a man was found dead from cyanide poisoning near the Philadelphia airport with a picture of a Nazi aircraft in his wallet. Taped to his abdomen was an enciphered message. In 1912, a book dealer named Wilfrid Voynich came into possession of an illuminated cipher manuscript once belonging to Emperor Rudolf II, who was obsessed with alchemy and the occult. Wartime codebreakers tried—and failed—to unlock the book's secrets, and it remains an enigma to this day. In this lively and entertaining book, Craig Bauer examines these and other vexing ciphers yet to be cracked. Some may reveal the identity of a spy or serial killer, provide the location of buried treasure, or expose a secret society—while others may be elaborate hoaxes. Unsolved! begins by explaining the basics of cryptology, and then explores the history behind an array of unsolved ciphers. It looks at ancient ciphers, ciphers created by artists and composers, ciphers left by killers and victims, Cold War ciphers, and many others. Some are infamous, like the ciphers in the Zodiac letters, while others were created purely as intellectual challenges by figures such as Nobel Prize–winning physicist Richard P. Feynman. Bauer lays out the evidence surrounding each cipher, describes the efforts of geniuses and eccentrics—in some cases both—to decipher it, and invites readers to try their hand at puzzles that have stymied so many others. Unsolved! takes readers from the ancient world to the digital age, providing an amazing tour of many of history's greatest unsolved ciphers.