1 edition of Stream Ciphers found in the catalog.
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.
|Statement||by Andreas Klein|
|Contributions||SpringerLink (Online service)|
|The Physical Object|
|Format||[electronic resource] /|
|Pagination||XIX, 399 p. 71 illus.|
|Number of Pages||399|
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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 Stream Ciphers book many modern examples Stream Ciphers book their robustness against by: 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. Stream ciphers Stream ciphers are encryption algorithms that apply encryption algorithms on a bit-by-bit basis (one bit at a time) to plaintext using a keystream.
There are two types of - Selection from Mastering Blockchain - Second Edition [Book]. This book is almost entirely concerned with stream ciphers, concentrating on a particular mathematical model for such ciphers which are called additive natural stream ciphers.
These ciphers use a natural sequence generator to produce a periodic : The main purpose in writing this book is to invoke an interaction between number theory and stream ciphers. This book is organized as follows. Chapter 2 is an introduction to synchronous and self-synchronous stream ciphers, as well as some keystream generators and some cryptographic factors of sequences.
It is intended to introduce only some. Stream ciphers are an important class of encryption algorithms. They encrypt individual characters (usually binary digits) of a plaintext message one at a time, using an encryp-File Size: KB.
Stream ciphers are designed to approximate an idealized cipher, known as the One-Time Pad. The One-Time Pad, which is supposed to employ a purely random key, can potentially achieve "perfect secrecy".
That is, it's supposed to be fully immune to brute force attacks. Stream Cipher typically encrypts one byte of the message at that moment instead of using blocks. Let’s take an example, suppose the original message (plain text) is “blue sky” in ASCII (i.e.
text format). When you convert these ASCII into equivalent binary values, it. Stream ciphers can be viewed as approximating the action of a proven unbreakable cipher, the one-time pad (OTP).
A one-time pad uses a keystream of completely random digits. The keystream is combined with the plaintext digits one at a time to form the ciphertext. This system was proved to be secure by Claude E.
Shannon in While reading NIST SP A, "Recommendation for Random Number Generation Using Deterministic Random Bit Generators", I noted that no stream cipher was included among the various specified solutions.
I also noted that, at least as far as I could tell from the list of other NIST SP series publications, no stream ciphers seem to be currently approved or recommended by NIST.
The goal of eSTREAM was to promote the design of new stream ciphers with a particular emphasis on algorithms that would be either very fast in software or very resource-efficient in hardware.
Algorithm designers were invited to submit new stream cipher proposals to eSTREAM, and 34 candidates were proposed from around the world. Good question. The coverage in books is lighter than that for block ciphers, but there are a few excellent books out there.
Two classics: Analysis and Design of Stream Ciphers by Stream Ciphers book. Rueppel and Stability Theory of Stream Ciphers, Ding, Xiao and Shan. Very theoretical, wonderful: Stream Ciphers and Number Theory, Cusick, Dai and Renvall.
There are newer books by Klein, Maitra, Robshaw as well. Purchase Stream Ciphers and Number Theory, Volume 66 - 1st Edition. Print Book & E-Book.
ISBNSodium includes implementations of the Salsa20, XSalsa20, ChaCha20 and XChaCha20 stream ciphers. These functions are stream ciphers. They do not provide authenticated encryption.
They can be used to generate pseudo-random data from a key, or. A stream cipher is used for SSL secure connection for web whereas block cipher is used for database, file encryption. Encryption can be implemented bit by bit in stream ciphers and instantly when new data is available for processing, so an incoming bit will automatically generate.
In practice today, the Vernam cipher is any stream cipher in which pseudorandom or random text is combined with plaintext to produce cipher text that is the same length as the cipher. RC4 is a modern example of a Vernam cipher.
RC4 Stream Cipher and Its Variants is the first book to fully cover the popular software stream cipher RC4. With extensive expertise in stream cipher cryptanalysis and RC4 research, the authors focus on the analysis and design issues of RC4.
By Dan Boneh and Victor Shoup. Download book: version (latest version, Sep. ) Tables of contents at a glance.
Part I: Secret key cryptography. 1: Introduction. 3: Stream ciphers. 4: Block ciphers. 5: Chosen plaintext attacks. 6: Message integrity. 7: Message integrity from universal hashing. 8: Message integrity from collision resistant. This is the unique book on cross-fertilisations between stream ciphers and number theory.
It systematically and comprehensively covers known connections between the two areas that are available only in research papers. Some parts of this book consist of. In summary, this book is a very readable exposition of major issues and interesting solutions in the theory of stream ciphers.
Its mathematical content makes it suitable for the advanced undergraduate or the graduate level in computer science, mathematics, or electrical engineering. : Stream Ciphers eBook: Andreas Klein: Kindle Store. Skip to main content. Try Prime Hello, Sign in Account & Lists Sign in Account & Lists Orders Try Prime Cart.
Kindle Store Go Search Best Sellers Gift Ideas. Book Description. RC4 Stream Cipher and Its Variants is the first book to fully cover the popular software stream cipher RC4.
With extensive expertise in stream cipher cryptanalysis and RC4 research, the authors focus on the analysis and design issues of RC4.
They also explore variants of RC4 and the eSTREAM finalist HC A stream cipher performs an encryption which is similar to the One-time Pad (OTP) en- cryption technique. It produces a large chunk of secret, random looking data and combines itFile Size: KB.
Stream Cipher Converts the plain text into cipher text by taking 1 byte of plain text at a time. Block cipher uses either 64 bits or more than 64 bits. While stream cipher uses 8 bits. The complexity of block cipher is simple.
While stream cipher is more complex. Block cipher Uses confusion as well as diffusion. While stream cipher 2/5.
The origins of linear cryptanalysis can be traced back to a number of seminal works of the early s. Since its invention, several theoretical and practical aspects of the technique have been studied, understood and generalized, resulting in more elaborated attacks against certain ciphers, but also in some negative results regarding the potential of various attempts at generalization.
As a result of the idea is far much less developed, stream ciphers are typically skipped in books on cryptography. This book fills this gap. It covers the arithmetic of stream ciphers and its historic previous, and as well as discusses many fashionable examples and their robustness in the direction of assaults.
A Stream Ciphers A block cipher encrypts large blocks of data using a fixed key. A stream cipher, on the other hand, encrypts small blocks of data (typically bits or - Selection from Public-key Cryptography: Theory and Practice [Book].
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 : Andreas Klein.
A stream cipher is a symmetric key cipher (method of encryption) where plaintext digits are combined with a pseudorandom cipher digit stream. A block cipher is an encryption method that applies a deterministic algorithm along with a symmetric key to encrypt a block of text.
Instructor: Dan Boneh, Stanford University The following is a free textbook for the course. The book goes into more depth, including security proofs, and many exercises.
A Graduate Course in Applied Cryptography by D. Boneh and V. Shoup Stream Ciphers 1: the one-time pad and stream ciphers. Stream Cipher: A stream cipher is a method of encryption where a pseudorandom cipher digit stream is combined with plain text digits.
This pseudorandom cipher digit stream is applied to each binary digit, one bit at a time. This method of encryption uses an infinite number of pseudorandom cipher digits per key.
Stream cipher is also known as. Stream ciphers come in two flavors: synchronous and self-synchronizing. Synchronous stream ciphers generate their keystreams independent of the plaintext and ciphertext.
If the sender and receiver fall out of synchronization (e.g., by losing a ciphertext character during transmission), gibberish results. Self-synchronous stream ciphers generateFile Size: 65KB.
Stream ciphers. [Andreas Klein] -- In cryptography, ciphers is the technical term for encryption and decryption algorithms.
From the book reviews:"This book focuses on the theory of stream ciphers and their applications. Seldom does one find a summary of the theory of stream ciphers as systematic as that in the book Read more.
This book is almost entirely concerned with stream ciphers, concentrating on a particular mathematical model for such ciphers which are called additive natural stream ciphers use a natural sequence generator to produce a periodic keystream. Full. Grain  is a lightweight stream cipher proposed byson, and to the eSTREAM call for stream cipher proposals of the European project ECRYPT .
A block cipher is capable of encrypting a single fixed-sized block of data; and, by the evidence around us, apparently it is easier to build good block ciphers than stream ciphers. Good news, though. By using a given block cipher in some particular patterns (a "mode of operation"), and with the aid of particular padding strategies, we can.
Salsa20 is a family of bit stream ciphers designed in and submitted to eSTREAM, the ECRYPT Stream Cipher Project. Salsa20 has progressed to the third round of eSTREAM without any changes. The round stream cipher Salsa20/20 is consistently. Traditionally book ciphers work by replacing words in the plaintext of a message with the location of words from the book being used.
In this mode, book ciphers are more properly called codes. This can have problems; if a word appears in the plaintext but not in the book, it cannot be encoded.
2. Stream Ciphers 1. Understanding Cryptography – A Textbook for Students and Practitioners by Christof Paar and JanPelzl Chapter 2 – Stream Ciphers ver. Octo These slides were prepared by Thomas Eisenbarth, Christof Paar and JanPelzl Modified by Sam Bowne. Book cipher is a kind of secret code, that uses a very common article (a book) as the key.
All they have to do is to transmit the location codes that are needed to pinpoint specific words in that book. If you don't know which book, no way of cracking.
Agents share a common book (the 'key') that they both need to have in possession. Running (or book) ciphers: For example, the key is page of The Catcher in the Rye, and text on that page is added modulo 26 to perform encryption/decryption.
Vernam ciphers: Also known as one-time pads, which are random keystreams that can only be used once. Both the sender and receiver have the same one-time pad that contains a keystream.