Cryptology ePrint Archive: Report 2003/012

The number of initial states of the RC4 cipher with the same cycle structure

Marina Pudovkina

Abstract: RC4 cipher is the most widely used stream cipher in software applications. It was designed by R. Rivest in 1987. In this paper we find the number of keys of the RC4 cipher generating initial permutations with the same cycle structure. We obtain that the distribution of initial permutations is not uniform.

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Publication Info: Journal of Information Security, 2002

Date: received 20 Jan 2003

Contact author: maricap at online ru

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Version: 20030122:221437 (All versions of this report)

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