RC4 improvement idea

[Noel Yap]

> For one key in 256, you can tell what eight bits of the state box are.  
> For one key in 64000 you can tell what sixteen bits of the state box are, 
> and so on and so forth.
> 
> Such keys are not weak.

Any statistical correlation can be used to an attacker's advantage.  Maybe your kid sister might not be able to figure it out, but someone else out there will.