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**2014/315**

**Title:**

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

**Authors:**
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.

**ePrint:**
https://eprint.iacr.org/2014/315

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