RC4 Stream Cipher and Its Variants. Provos N. Canon India Software Development Center. , Mazeries D. Celebrity Cipher Solver, free celebrity cipher solver software downloads, Page 3. The Zaphod Cipher is a SPN cipher that uses simple operations to have 120 bits affected by 1 in the first round. 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.

Features • Represents the first complete book on RC4 • Requires no prior knowledge of cryptography • Introduces basic concepts, such as private/public key cryptosystems and block/stream ciphers, before covering advanced material • Elucidates the theoretical underpinnings and experimental observations • Includes end-of-chapter research problems that highlight opportunities for future research • Offers a comprehensive bibliography of RC4 literature Summary 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-128.

After an introduction to the vast field of cryptology, the book reviews hardware and software stream ciphers and describes RC4. It presents a theoretical analysis of RC4 KSA, discussing biases of the permutation bytes toward secret key bytes and absolute values. The text explains how to reconstruct the secret key from known state information and analyzes the RC4 PRGA in detail, including a sketch of state recovery attacks. The book then describes three popular attacks on RC4: distinguishing attacks, Wired Equivalent Privacy (WEP) protocol attacks, and fault attacks. The authors also compare the advantages and disadvantages of several variants of RC4 and examine stream cipher HC-128, which is the next level of evolution after RC4 in the software stream cipher paradigm.

The final chapter emphasizes the safe use of RC4. With open research problems in each chapter, this book offers a complete account of the most current research on RC4. Reviews 'This remarkable monograph is ‘the first one on RC4.’ The theory surrounding the development of RC4 is very helpful for the study of stream ciphers in general, as the authors say. The book will be of interest to scholars and students whose expertise lies in cryptography, applied mathematics, computer security, and so on.' —Zhixiong Chen, Mathematical Reviews, January 2013 'I am delighted to introduce the first complete book on RC4, the most popular and widely deployed software stream cipher.

This book contains not only the authors’ own research materials, but it has nicely assimilated the results of others to make it a complete treatise on RC4 and its variants. I believe this book will be widely accepted as an important research monograph by both the students and experienced researchers in the field of cryptology.' —From the Foreword by Bimal Roy, founder of the Cryptology Research Society of India and director of the Indian Statistical Institute.

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• • Part of the book series (AISC, volume 339) Abstract RC4 is a simple and fast cipher, which has proved itself as robust enough and it is trusted by many organizations. But a number of researchers claimed that RC4 has some weakness and bias in its internal states. To increase its security, some guidelines recommended discarding the first N or 2 N bytes from the final output stream, where N is generally 256. In this paper, it has been statistically analyzed whether the outputs of the algorithm really acquire more security by discarding more number of initial bytes, like 4 N or 8 N. The original and modified algorithms are analyzed with NIST Statistical Test Suite and it has been tried to estimate an optimum quantity of output bytes to be discarded.