cryptanalysis a study of ciphers and their solution

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Author : Helen F. Gaines
ISBN : 9780486800592
Genre : Games & Activities
File Size : 81. 90 MB
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Thorough, systematic introduction to serious cryptography, especially strong in modern forms of cipher solution used by experts. Simple and advanced methods. 166 specimens to solve — with solutions.


Author : Helen Fouché Gaines
ISBN : 0486200973
Genre : Games
File Size : 51. 32 MB
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Includes "166 cryptograms."

Cryptanalysis A Study Of Ciphers And Their Solutions

Author : Helen Fouché Gaines
ISBN : OCLC:971829575
Genre :
File Size : 23. 41 MB
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A Methodology For The Cryptanalysis Of Classical Ciphers With Search Metaheuristics

Author : George Lasry
ISBN : 9783737604581
Genre :
File Size : 53. 67 MB
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Cryptography, the art and science of creating secret codes, and cryptanalysis, the art and science of breaking secret codes, underwent a similar and parallel course during history. Both fields evolved from manual encryption methods and manual codebreaking techniques, to cipher machines and codebreaking machines in the first half of the 20th century, and finally to computerbased encryption and cryptanalysis from the second half of the 20th century. However, despite the advent of modern computing technology, some of the more challenging classical cipher systems and machines have not yet been successfully cryptanalyzed. For others, cryptanalytic methods exist, but only for special and advantageous cases, such as when large amounts of ciphertext are available. Starting from the 1990s, local search metaheuristics such as hill climbing, genetic algorithms, and simulated annealing have been employed, and in some cases, successfully, for the cryptanalysis of several classical ciphers. In most cases, however, results were mixed, and the application of such methods rather limited in their scope and performance. In this work, a robust framework and methodology for the cryptanalysis of classical ciphers using local search metaheuristics, mainly hill climbing and simulated annealing, is described. In an extensive set of case studies conducted as part of this research, this new methodology has been validated and demonstrated as highly effective for the cryptanalysis of several challenging cipher systems and machines, which could not be effectively cryptanalyzed before, and with drastic improvements compared to previously published methods. This work also led to the decipherment of original encrypted messages from WWI, and to the solution, for the first time, of several public cryptographic challenges.

A Cultural History Of Early Modern English Cryptography Manuals

Author : Katherine Ellison
ISBN : 9781315458205
Genre : Literary Criticism
File Size : 88. 25 MB
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During and after the English civil wars, between 1640 and 1690, an unprecedented number of manuals teaching cryptography were published, almost all for the general public. While there are many surveys of cryptography, none pay any attention to the volume of manuals that appeared during the seventeenth century, or provide any cultural context for the appearance, design, or significance of the genre during the period. On the contrary, when the period’s cryptography writings are mentioned, they are dismissed as esoteric, impractical, and useless. Yet, as this book demonstrates, seventeenth-century cryptography manuals show us one clear beginning of the capitalization of information. In their pages, intelligence—as private message and as mental ability—becomes a central commodity in the emergence of England’s capitalist media state. Publications boasting the disclosure of secrets had long been popular, particularly for English readers with interests in the occult, but it was during these particular decades of the seventeenth century that cryptography emerged as a permanent bureaucratic function for the English government, a fashionable activity for the stylish English reader, and a respected discipline worthy of its own genre. These manuals established cryptography as a primer for intelligence, a craft able to identify and test particular mental abilities deemed "smart" and useful for England’s financial future. Through close readings of five specific primary texts that have been ignored not only in cryptography scholarship but also in early modern literary, scientific, and historical studies, this book allows us to see one origin of disciplinary division in the popular imagination and in the university, when particular broad fields—the sciences, the mechanical arts, and the liberal arts—came to be viewed as more or less profitable.

Secret History

Author : Craig P. Bauer
ISBN : 9781466561861
Genre : Computers
File Size : 69. 59 MB
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Winner of an Outstanding Academic Title Award from CHOICE Magazine Most available cryptology books primarily focus on either mathematics or history. Breaking this mold, Secret History: The Story of Cryptology gives a thorough yet accessible treatment of both the mathematics and history of cryptology. Requiring minimal mathematical prerequisites, the book presents the mathematics in sufficient detail and weaves the history throughout the chapters. In addition to the fascinating historical and political sides of cryptology, the author—a former Scholar-in-Residence at the U.S. National Security Agency (NSA) Center for Cryptologic History—includes interesting instances of codes and ciphers in crime, literature, music, and art. Following a mainly chronological development of concepts, the book focuses on classical cryptology in the first part. It covers Greek and Viking cryptography, the Vigenère cipher, the one-time pad, transposition ciphers, Jefferson’s cipher wheel, the Playfair cipher, ADFGX, matrix encryption, World War II cipher systems (including a detailed examination of Enigma), and many other classical methods introduced before World War II. The second part of the book examines modern cryptology. The author looks at the work of Claude Shannon and the origin and current status of the NSA, including some of its Suite B algorithms such as elliptic curve cryptography and the Advanced Encryption Standard. He also details the controversy that surrounded the Data Encryption Standard and the early years of public key cryptography. The book not only provides the how-to of the Diffie-Hellman key exchange and RSA algorithm, but also covers many attacks on the latter. Additionally, it discusses Elgamal, digital signatures, PGP, and stream ciphers and explores future directions such as quantum cryptography and DNA computing. With numerous real-world examples and extensive references, this book skillfully balances the historical aspects of cryptology with its mathematical details. It provides readers with a sound foundation in this dynamic field.

Word Play Write Your Own Crazy Comics 2

Author : Chuck Whelon
ISBN : 9780486481661
Genre : Juvenile Nonfiction
File Size : 37. 65 MB
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More than 60 pages of cartoon panels depict comic scenarios, all with empty word balloons for aspiring comedy writers to fill with snappy dialogue. Kids can color the pictures, too!

How To Draw Princesses And Other Fairy Tale Pictures

Author : Barbara Soloff Levy
ISBN : 9780486468136
Genre : Juvenile Nonfiction
File Size : 86. 87 MB
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Provides step-by-step instructions for drawing princesses and fairy tale objects.

Hand Shadow Fun

Author : Frank Jacobs
ISBN : 9780486801933
Genre : Juvenile Nonfiction
File Size : 49. 79 MB
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Detailed illustrations depict the formation of 28 images using only hands and fingers. Entertain friends and family with shadow pictures of a bird, bunny, elephant, and other figures.

Self Working Number Magic

Author : Karl Fulves
ISBN : 0486243915
Genre : Games
File Size : 80. 19 MB
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Clear instructions for 101 tricks and problems, many based on important math principles. Master such number phenomena as Lightning Calculations, Giant Memory, Magic Squares, nearly 100 more. 98 illustrations.

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