Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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


    User Avatar
    Science Advisor
    Homework Helper

    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.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?