Codes and Cryptography

Author: Dominic Welsh

Publisher: Oxford University Press

ISBN: 9780198532873

Category: Ciphers.

Page: 257

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This textbook unifies the concepts of information, codes and cryptography as first considered by Shannon in his seminal papers on communication and secrecy systems. The book has been the basis of a very popular course in Communication Theory which the author has given over several years toundergraduate mathematicians and computer scientists at Oxford. The first five chapters of the book cover the fundamental ideas of information theory, compact encoding of messages, and an introduction to the theory of error-correcting codes. After a discussion of mathematical models of English, there is an introduction to the classical Shannon model ofcryptography. This is followed by a brief survey of those aspects of computational complexity needed for an understanding of modern cryptography, password systems and authentication techniques. Because the aim of the text is to make this exciting branch of modern applied mathematics available to readers with a wide variety of interests and backgrounds, the mathematical prerequisites have been kept to an absolute minimum. In addition to an extensive bibliography there are many exercises(easy) and problems together with solutions.

Geometries, Codes and Cryptography

Author: G. Longo,M. Marchi,A. Sgarro

Publisher: Springer

ISBN: 3709128382

Category: Computers

Page: 228

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The general problem studied by information theory is the reliable transmission of information through unreliable channels. Channels can be unreliable either because they are disturbed by noise or because unauthorized receivers intercept the information transmitted. In the first case, the theory of error-control codes provides techniques for correcting at least part of the errors caused by noise. In the second case cryptography offers the most suitable methods for coping with the many problems linked with secrecy and authentication. Now, both error-control and cryptography schemes can be studied, to a large extent, by suitable geometric models, belonging to the important field of finite geometries. This book provides an update survey of the state of the art of finite geometries and their applications to channel coding against noise and deliberate tampering. The book is divided into two sections, "Geometries and Codes" and "Geometries and Cryptography". The first part covers such topics as Galois geometries, Steiner systems, Circle geometry and applications to algebraic coding theory. The second part deals with unconditional secrecy and authentication, geometric threshold schemes and applications of finite geometry to cryptography. This volume recommends itself to engineers dealing with communication problems, to mathematicians and to research workers in the fields of algebraic coding theory, cryptography and information theory.

Codes and Ciphers - A History Of Cryptography

Author: Alexander D'Agapeyeff

Publisher: Read Books Ltd

ISBN: 1473350913

Category: Computers

Page: 150

View: 4465

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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. 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?, etcetera. 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.

Information Theory, Coding and Cryptography

Author: Arijit Saha,NilotPal Manna,Surajit Mandal

Publisher: Pearson Education India

ISBN: 9332517843

Category:

Page: 276

View: 7932

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Information Theory, Coding & Cryptography has been designed as a comprehensive book for the students of engineering discussing Source Encoding, Error Control Codes & Cryptography. The book contains the recent developments of coded modulation, trellises for codes, turbo coding for reliable data and interleaving. The text balances the mathematical rigor with exhaustive amount of solved, unsolved questions along with a database of MCQs.

Coding and Cryptography

International Workshop, WCC 2005, Bergen, Norway, March 14-18, 2005, Revised Selected Papers

Author: Øyvind Ytrehus

Publisher: Springer Science & Business Media

ISBN: 3540354816

Category: Computers

Page: 441

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Thisvolumecontainsrefereedpapersdevotedtocodingandcryptography.These papers arethe full versionsof a selectionof the best extended abstractsaccepted for presentation at the International Workshop on Coding and Cryptography (WCC 2005) held in Bergen, Norway, March 14–18, 2005. Each of the 118 - tended abstracts originallysubmitted to the workshop were reviewed by at least two members of the Program Committee. As a result of this screening process, 58 papers were selected for presentation, of which 52 were eventually presented at the workshop together with four invited talks. The authors of the presented papers were in turn invited to submit full v- sions of their papers to the full proceedings. Each of the full-version submissions were once again thoroughly examined and commented upon by at least two reviewers. This volume is the end result of this long process. I am grateful to the reviewers who contributed to guaranteeing the high standards of this volume, and who are named on the next pages. It was a pl- sure for me to work with my program co-chair Pascale Charpin, whose expe- enced advice I havefurther bene?ted greatly from during the preparationof this ́ volume. Discussions with Tor Helleseth and Angela Barbero were also useful in putting the volume together. Finally, I would like to thank all the authors and all the other participants of the WCC 2005 for making it in every sense a highly enjoyable event.

Gröbner Bases, Coding, and Cryptography

Author: Massimiliano Sala,Teo Mora,Ludovic Perret,Shojiro Sakata,Carlo Traverso

Publisher: Springer Science & Business Media

ISBN: 3540938060

Category: Mathematics

Page: 430

View: 5398

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Coding theory and cryptography allow secure and reliable data transmission, which is at the heart of modern communication. Nowadays, it is hard to find an electronic device without some code inside. Gröbner bases have emerged as the main tool in computational algebra, permitting numerous applications, both in theoretical contexts and in practical situations. This book is the first book ever giving a comprehensive overview on the application of commutative algebra to coding theory and cryptography. For example, all important properties of algebraic/geometric coding systems (including encoding, construction, decoding, list decoding) are individually analysed, reporting all significant approaches appeared in the literature. Also, stream ciphers, PK cryptography, symmetric cryptography and Polly Cracker systems deserve each a separate chapter, where all the relevant literature is reported and compared. While many short notes hint at new exciting directions, the reader will find that all chapters fit nicely within a unified notation.

Coding and Cryptography

Synergy for a Robust Communication

Author: Natasa Zivic

Publisher: Walter de Gruyter

ISBN: 348678126X

Category: Technology & Engineering

Page: 134

View: 2837

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This book presents the benefits of the synergetic effect of the combination of coding and cryptography. It introduces new directions for the interoperability between the components of a communication system. Coding and cryptography are standard components in today’s distributed systems. The integration of cryptography into coding aspects is very interesting, as the usage of cryptography will be common use, even in industrial applications. The book is based on new developments of coding and cryptography, which use real numbers to express reliability values of bits instead of binary values 0 and 1. The presented methods are novel and designed for noisy communication, which doesn ́t allow the successful use of cryptography. The rate of successful verifications is improved essentially not only for standard or “hard” verification, but even more after the introduction of “soft” verification. A security analysis shows the impact on the security. Information security and cryptography follow the late developments of communication theory by changing from “hard” to “soft”, which results in much better results.

Breaking the Code with Cryptography

Analyzing Patterns

Author: Janey Levy

Publisher: The Rosen Publishing Group, Inc

ISBN: 9781404260894

Category: Juvenile Nonfiction

Page: 32

View: 2669

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A brief history of cryptography also shows how to break simple ciphers by analyzing the patterns used to create them.

Coding Theory, Cryptography and Related Areas

Proceedings of an International Conference on Coding Theory, Cryptography and Related Areas, held in Guanajuato, Mexico, in April 1998

Author: Johannes Buchmann,Tom Hoeholdt,Henning Stichtenoth,Horacio Tapia-Recillas

Publisher: Springer Science & Business Media

ISBN: 3642571891

Category: Computers

Page: 260

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A series of research papers on various aspects of coding theory, cryptography, and other areas, including new and unpublished results on the subjects. The book will be useful to students, researchers, professionals, and tutors interested in this area of research.

United States Diplomatic Codes and Ciphers, 1775-1938

Author: Ralph E. Weber

Publisher: Routledge

ISBN: 1351316184

Category: Business & Economics

Page: 623

View: 2043

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United States Diplomatic Codes and Ciphers, 1775-1938 is the first basic reference work on American diplomatic cryptography. Weber's research in national and private archives in the Americas and Europe has uncovered more than one hundred codes and ciphers. Beginning with the American Revolution, these secret systems masked confidential diplomatic correspondence and reports.During the period between 1775 and 1938, both codes and ciphers were employed. Ciphers were frequently used for American diplomatic and military correspondence during the American Revolution. At that time, a system was popular among American statesmen whereby a common book, such as a specific dictionary,was used by two correspondents who encoded each word in a message with three numbers. In this system, the first number indicated the page of the book, the second the line in the book, and the third the position of the plain text word on that line counting from the left. Codes provided the most common secret language basis for the entire nineteenth century.Ralph Weber describes in eight chapters the development of American cryptographic practice. The codes and ciphers published in the text and appendix will enable historians and others to read secret State Department dispatches before 1876, and explain code designs after that year.

Codes and Ciphers

Author: Sean Callery

Publisher: Harper Collins

ISBN: 0061374075

Category: Reference

Page: 192

View: 4249

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A user-friendly introduction to the history of secret communications traces the applications of such examples as smoke signals, military encryptions, and computer algorithms, in a practical account that also traces the contributions of code-breakers and shares practical information on code making. Original.

Codes and Ciphers

Julius Caesar, the Enigma, and the Internet

Author: R. F. Churchhouse

Publisher: Cambridge University Press

ISBN: 9780521008907

Category: Business & Economics

Page: 240

View: 8855

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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).

QC-LDPC Code-Based Cryptography

Author: Marco Baldi

Publisher: Springer Science & Business

ISBN: 3319025562

Category: Technology & Engineering

Page: 120

View: 3830

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This book describes the fundamentals of cryptographic primitives based on quasi-cyclic low-density parity-check (QC-LDPC) codes, with a special focus on the use of these codes in public-key cryptosystems derived from the McEliece and Niederreiter schemes. In the first part of the book, the main characteristics of QC-LDPC codes are reviewed, and several techniques for their design are presented, while tools for assessing the error correction performance of these codes are also described. Some families of QC-LDPC codes that are best suited for use in cryptography are also presented. The second part of the book focuses on the McEliece and Niederreiter cryptosystems, both in their original forms and in some subsequent variants. The applicability of QC-LDPC codes in these frameworks is investigated by means of theoretical analyses and numerical tools, in order to assess their benefits and drawbacks in terms of system efficiency and security. Several examples of QC-LDPC code-based public key cryptosystems are presented, and their advantages over classical solutions are highlighted. The possibility of also using QC-LDPC codes in symmetric encryption schemes and digital signature algorithms is also briefly examined.

Mysterious Messages: A History of Codes and Ciphers

A History of Codes and Ciphers

Author: Gary Blackwood

Publisher: Penguin

ISBN: 9781101151013

Category: Juvenile Nonfiction

Page: 144

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History?s amazing secrets and codes?and how to crack them yourself. This fascinating look at history?s most mysterious messages is packed with puzzles to decode and ciphers that kids can use themselves. Here are the encrypted notes of Spartan warriors, the brilliant code-crackers of Elizabeth I, secret messages of the American Revolution, spy books of the Civil War, the famous Enigma Machine, and the Navajo code talkers. As computers change the way we communicate, codes today are more intriguing than ever. From invisible ink to the CIA, this exciting trip through history is a hands-on, interactive experience? so get cracking!

Spy Codes and Ciphers

Author: Susan K. Mitchell

Publisher: Enslow Publishing, LLC

ISBN: 9780766037090

Category: Juvenile Nonfiction

Page: 48

View: 9386

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"Discusses different methods of secret communications used by spies, such as Morse code, the Enigma machine, the Najavo language, and digital steganography, and includes career information"--

Public-Key Cryptography and Computational Number Theory

Proceedings of the International Conference organized by the Stefan Banach International Mathematical Center Warsaw, Poland, September 11-15, 2000

Author: Kazimierz Alster,Jerzy Urbanowicz,Hugh C. Williams

Publisher: Walter de Gruyter

ISBN: 3110881039

Category: Mathematics

Page: 343

View: 8627

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The Proceedings contain twenty selected, refereed contributions arising from the International Conference on Public-Key Cryptography and Computational Number Theory held in Warsaw, Poland, on September 11-15, 2000. The conference, attended by eightyfive mathematicians from eleven countries, was organized by the Stefan Banach International Mathematical Center. This volume contains articles from leading experts in the world on cryptography and computational number theory, providing an account of the state of research in a wide variety of topics related to the conference theme. It is dedicated to the memory of the Polish mathematicians Marian Rejewski (1905-1980), Jerzy Róøycki (1909-1942) and Henryk Zygalski (1907-1978), who deciphered the military version of the famous Enigma in December 1932 – January 1933. A noteworthy feature of the volume is a foreword written by Andrew Odlyzko on the progress in cryptography from Enigma time until now.

Enhancing Cryptographic Primitives with Techniques from Error Correcting Codes

Author: Bart Preneel

Publisher: IOS Press

ISBN: 1607500027

Category: Computers

Page: 273

View: 2501

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The NATO Advanced Research Workshop on Enhancing Cryptographic Primitives with Techniques from Error Correcting Codes has been organized in Veliko Tarnovo, Bulgaria, on October 6-9, 2008. This title includes the papers based on the lectures of the invited speakers, and on the talks of the participants in the workshop.