On Lfsr Based Stream Ciphers
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On Lfsr Based Stream Ciphers
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Author : Patrik Ekdahl
language : en
Publisher:
Release Date : 2003
On Lfsr Based Stream Ciphers written by Patrik Ekdahl and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
An Improved Linear Feedback Shift Register Lfsr Based Stream Cipher Generator
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Author : Reyadh H. Mahdi
language : en
Publisher:
Release Date : 2009
An Improved Linear Feedback Shift Register Lfsr Based Stream Cipher Generator written by Reyadh H. Mahdi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Computer algorithms categories.
Progress In Cryptology Indocrypt 2007
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Author : K. Srinathan
language : en
Publisher: Springer
Release Date : 2007-12-03
Progress In Cryptology Indocrypt 2007 written by K. Srinathan and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-12-03 with Computers categories.
This book constitutes the refereed proceedings of the 8th International Conference on Cryptology in India, INDOCRYPT 2007, held in Chennai, India, in December 2007. The papers and three invited lectures were carefully reviewed and selected. The papers are organized in topical sections on hashing, elliptic curve, cryptoanalysis, information theoretic security, elliptic curve cryptography, signature, side channel attack, symmetric cryptosystem, asymmetric cryptosystem, and short papers.
Power Analysis Of Stream Ciphers Based On Feedback Shift Registers
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Author : Abdulah Abdulah Zadeh
language : en
Publisher:
Release Date : 2014
Power Analysis Of Stream Ciphers Based On Feedback Shift Registers written by Abdulah Abdulah Zadeh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
In recent days, many cryptographic devices, such as smart-cards and cell phones, are widely accessible to many people. However, wide access to cryptographic devices makes them vulnerable to side channel analysis (SCA) attack. As such, there is a high demand for research in the field of side channel analysis. Although SCA attacks have been extensively applied to block ciphers, only a limited amount of research is available on the effectiveness of side channel analysis on stream ciphers. In this dissertation, we study SCA attacks on stream ciphers and develop some cryptanalysis methods for applying the attacks effectively on practical realization of stream ciphers. The proposed power analysis attacks were first theoretically applied to stream ciphers with a linear feedback shift register (LFSR) and nonlinear filtering function, a structure referred to as a filter generator. Since typical stream ciphers include multiple LFSRs and/or nonlinear feedback shift registers (NLFSRs), we first consider the extension of the typical power analysis attack to stream ciphers with multiple LFSRs and a nonlinear combining function, known as a combination generator. Then, the attack is extended to stream ciphers based on nonlinear feedback shift registers (NLFSRs) and stream ciphers with multiple NLFSRs and LFSRs. In most papers related to applying side channel analysis attacks to stream ciphers, the authors ignore the effect of noise and inaccurate measurements. This limits the applicability of their methods for real applications. This dissertation has developed side channel analysis attacks on feedback shift register (FSR) based stream ciphers with consideration of inaccurate measurement effects. At first, we have developed the attack for stream ciphers based on an individual LFSR and/or NLFSR, while the power measurements are inaccurate and they do not exactly match the theoretical values. Later, considering inaccurate measurements, we have developed power analysis of stream ciphers with multiple LFSRs and NLFSRs. Finally, we consider combining SCA with some classical attacks on stream ciphers based on mathematical and statistical approaches to recover key or state bits of the stream ciphers. Hence, we have extended the correlation attack, fast correlation attack and algebraic attack, which are mathematical (or classical) attacks, such that they are applicable with side channel analysis. The proposed methods are validated through implementation on a practical cryptographic algorithm, the Grain stream cipher. The practical investigations in this dissertation are done using simulated ASIC circuits. To simulate the behavior of ASIC circuits, we have implemented them using Cadence Virtuoso Spectre Circuit Simulator version 5.10.41. All the circuits including LFSR, NLFSR and Grain, are prototyped in TSMC 180 nm standard cell CMOS technology. The simulated power consumptions are used to investigate the practical application of the proposed attacks. This dissertation shows power analysis is a powerful technique to attack stream ciphers and recover state bits and/or the key of the stream ciphers. Furthermore, combining classical methods and measured power data can significantly reduce the complexity of an attack of a stream cipher and countermeasure methods should be considered in hardware implementation of stream ciphers, to make them resistant to side channel analysis.
Design And Cryptanalysis Of Zuc
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Author : Chandra Sekhar Mukherjee
language : en
Publisher: Springer Nature
Release Date : 2021-01-27
Design And Cryptanalysis Of Zuc written by Chandra Sekhar Mukherjee and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-01-27 with Computers categories.
This book is a timely document of state-of-the art analytical techniques in the domain of stream cipher design and analysis with a specific cipher, named ZUC. It links new research to brief contextual literature review in the domain of complex LFSR-based stream ciphers. A snapshot of how stream ciphers are deployed in the mobile telephony architecture, one of the most well-known topics for more than five decades in the domain of computer and communication sciences, is presented in this book. The book provides an in-depth study on design and cryptanalysis of ZUC as well as relevant research results in this field with directions towards future analysis of this cipher.
Stream Ciphers
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Author : Andreas Klein
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-04-08
Stream Ciphers written by Andreas Klein and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-08 with Computers categories.
In cryptography, ciphers is the technical term for encryption and decryption algorithms. They are an important sub-family that features high speed and easy implementation and are an essential part of wireless internet and mobile phones. Unlike block ciphers, stream ciphers work on single bits or single words and need to maintain an internal state to change the cipher at each step. Typically stream ciphers can reach higher speeds than block ciphers but they can be more vulnerable to attack. Here, mathematics comes into play. Number theory, algebra and statistics are the key to a better understanding of stream ciphers and essential for an informed decision on their safety. Since the theory is less developed, stream ciphers are often skipped in books on cryptography. This book fills this gap. It covers the mathematics of stream ciphers and its history, and also discusses many modern examples and their robustness against attacks. Part I covers linear feedback shift registers, non-linear combinations of LFSRs, algebraic attacks and irregular clocked shift registers. Part II studies some special ciphers including the security of mobile phones, RC4 and related ciphers, the eStream project and the blum-blum-shub generator and related ciphers. Stream Ciphers requires basic knowledge of algebra and linear algebra, combinatorics and probability theory and programming. Appendices in Part III help the reader with the more complicated subjects and provides the mathematical background needed. It covers, for example, complexity, number theory, finite fields, statistics, combinatorics. Stream Ciphers concludes with exercises and solutions and is directed towards advanced undergraduate and graduate students in mathematics and computer science.
Cryptography And Coding
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Author : Matthew G. Parker
language : en
Publisher: Springer Science & Business Media
Release Date : 2009-12-07
Cryptography And Coding written by Matthew G. Parker and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-12-07 with Computers categories.
The12thintheseriesofIMAConferencesonCryptographyandCodingwasheld at the Royal Agricultural College, Cirencester, December 15–17, 2009. The p- gram comprised 3 invited talks and 26 contributed talks. The contributed talks werechosenbyathoroughreviewingprocessfrom53submissions.Oftheinvited and contributed talks,28 arerepresentedaspapersin this volume. These papers are grouped loosely under the headings: Coding Theory, Symmetric Crypt- raphy, Security Protocols, Asymmetric Cryptography, Boolean Functions, and Side Channels and Implementations. Numerous people helped to make this conference a success. To begin with I would like to thank all members of the Technical Program Committee who put a great deal of e?ort into the reviewing process so as to ensure a hi- quality program. Moreover, I wish to thank a number of people, external to the committee, who also contributed reviews on the submitted papers. Thanks, of course,mustalso goto allauthorswho submitted papers to the conference,both those rejected and accepted. The review process was also greatly facilitated by the use of the Web-submission-and-review software, written by Shai Halevi of IBM Research, and I would like to thank him for making this package available to the community. The invited talks were given by Frank Kschischang, Ronald Cramer, and Alexander Pott, and two of these invitedtalksappearaspapersinthisvolume. A particular thanks goes to these invited speakers, each of whom is well-known, notonlyforbeingaworld-leaderintheir?eld,butalsofortheirparticularability to communicate their expertise in an enjoyable and stimulating manner.
Understanding Cryptography
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Author : Christof Paar
language : en
Publisher: Springer Science & Business Media
Release Date : 2009-11-27
Understanding Cryptography written by Christof Paar and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-11-27 with Computers categories.
Cryptography is now ubiquitous – moving beyond the traditional environments, such as government communications and banking systems, we see cryptographic techniques realized in Web browsers, e-mail programs, cell phones, manufacturing systems, embedded software, smart buildings, cars, and even medical implants. Today's designers need a comprehensive understanding of applied cryptography. After an introduction to cryptography and data security, the authors explain the main techniques in modern cryptography, with chapters addressing stream ciphers, the Data Encryption Standard (DES) and 3DES, the Advanced Encryption Standard (AES), block ciphers, the RSA cryptosystem, public-key cryptosystems based on the discrete logarithm problem, elliptic-curve cryptography (ECC), digital signatures, hash functions, Message Authentication Codes (MACs), and methods for key establishment, including certificates and public-key infrastructure (PKI). Throughout the book, the authors focus on communicating the essentials and keeping the mathematics to a minimum, and they move quickly from explaining the foundations to describing practical implementations, including recent topics such as lightweight ciphers for RFIDs and mobile devices, and current key-length recommendations. The authors have considerable experience teaching applied cryptography to engineering and computer science students and to professionals, and they make extensive use of examples, problems, and chapter reviews, while the book’s website offers slides, projects and links to further resources. This is a suitable textbook for graduate and advanced undergraduate courses and also for self-study by engineers.
The Stability Theory Of Stream Ciphers
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Author : Cunsheng Ding
language : en
Publisher: Springer Science & Business Media
Release Date : 1991-12-04
The Stability Theory Of Stream Ciphers written by Cunsheng Ding and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991-12-04 with Business & Economics categories.
Secure message transmission is of extreme importance in today's information-based society. Stream encryption is a practically important means to this end. This monograph is devoted to a new aspect of stream ciphers, namely the stability theory of stream ciphers, with the purpose of developing bounds on complexity which can form part of the basis for a general theory of data security and of stabilizing stream-cipher systems. The approach adopted in this monograph is new. The topic is treated by introducing measure indexes on the security of stream ciphers, developing lower bounds on these indexes, and establishing connections among them. The treatment involves the stability of boolean functions, the stability of linear complexity of key streams, the period stability of key streams, and the stability of source codes. Misleading ideas about stream ciphers are exposed and new viewpoints presented. The numerous measure indexes and bounds on them that are introduced here, the approach based on spectrum techniques, andthe ten open problems presented will all be useful to the reader concerned with analyzing and designing stream ciphers for securing data.
Analysis And Design Of Stream Ciphers
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Author : Rainer A. Rueppel
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Analysis And Design Of Stream Ciphers written by Rainer A. Rueppel and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Technology & Engineering categories.
It is now a decade since the appearance of W. Diffie and M. E. Hellmann's startling paper, "New Directions in Cryptography". This paper not only established the new field of public-key cryptography but also awakened scientific interest in secret-key cryptography, a field that had been the almost exclusive domain of secret agencies and mathematical hobbyist. A number of ex cellent books on the science of cryptography have appeared since 1976. In the main, these books thoroughly treat both public-key systems and block ciphers (i. e. secret-key ciphers with no memo ry in the enciphering transformation) but give short shrift to stream ciphers (i. e. , secret-key ciphers wi th memory in the enciphering transformation). Yet, stream ciphers, such as those . implemented by rotor machines, have played a dominant role in past cryptographic practice, and, as far as I can determine, re main still the workhorses of commercial, military and diplomatic secrecy systems. My own research interest in stream ciphers found a natural re sonance in one of my doctoral students at the Swiss Federal Institute of Technology in Zurich, Rainer A. Rueppe1. As Rainer was completing his dissertation in late 1984, the question arose as to where he should publish the many new results on stream ciphers that had sprung from his research.