Cryptology ePrint Archive: Report 2014/315

Statistical weaknesses in 20 RC4-like algorithms and (probably) the simplest algorithm free from these weaknesses - VMPC-R

Bartosz Zoltak

Abstract: We find statistical weaknesses in 20 RC4-like algorithms including the original RC4, RC4A, PC-RC4 and others. This is achieved using a simple statistical test. We found only one algorithm which was able to pass the test - VMPC-R. This algorithm, being approximately three times more complex then RC4, is probably the simplest RC4-like cipher capable of producing pseudo-random output.

Category / Keywords: secret-key cryptography / PRNG; CSPRNG; RC4; VMPC-R; stream cipher; distinguishing attack

Date: received 4 May 2014, last revised 5 May 2014

Contact author: bzoltak at vmpcfunction com

Available format(s): PDF | BibTeX Citation

Note: Typing. "RC-4" was changed to "RC4"

Version: 20140505:112106 (All versions of this report)

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