Anzeige
Erschienen in:
2015 | OriginalPaper | Buchkapitel
How Not to Combine RC4 States
verfasst von : Subhadeep Banik, Sonu Jha
Erschienen in: Security, Privacy, and Applied Cryptography Engineering
Aktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
Over the past few years, an attractive design paradigm has emerged, that aims to produce new stream cipher designs, by combining one or more independently produced RC4 states. The ciphers so produced turn out to be faster than RC4 on any software platform, mainly because the average number of internal operations used in the cipher per byte of keystream produced is usually lesser than RC4. One of the main efforts of the designers is to ensure that the existing weaknesses of RC4 are not carried over to the new ciphers so designed. In this work we will look at two such ciphers RC4B (proposed by Zhang et. al.) and Quad-RC4/
m
-RC4 (proposed by Maitra et. al.). We will propose distinguishing attacks against all these ciphers, and look at certain design flaws that made these ciphers vulnerable.