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Rc4 Stream cipher

  1. Oct 22, 2008 #1

    I had a question regarding the rc4 stream cipher. I understand it is a bunch of permutations to the initial Array that goes from 0 to 255 with respect to the key.

    However is there such a key such that after the permutation S is still the same? (ie still goes from 0 to 255)?

    Any help would be appreciated, thanks
  2. jcsd
  3. Oct 22, 2008 #2


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    I don't know if it is explicitly prohibited but it wouldn't necessarily matter - a key of 1,2,3,4,5....255 is just as random as any other if you don't know if advance that it's the one you are using.
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