3 ms·

The Chaocipher revealed

• carver 16y ago
  Pretty cool! I was curious about this, so I built a 50-line Python version to confirm my understanding. Feel free to check it out and use it (LGPL): http://bitbucket.org/carver/chaocipher/src/tip/chaocipher.py http://bitbucket.org/carver/chaocipher/src/tip/chaocipher.py It could use things like a configurable key and interactive enciphering command line, and I would be happy to pull such changes. Edit updated link with improved comments about the rotation part of the cipher
  • Groxx 16y ago
    Your code serves as a much better explanation than the linked paper in the article. And that Perl code o_O
    • carver 16y ago
      Thanks! The paper was maybe a bit pedantic, but I appreciated his checkpoints and test cases. The perl was way overkill, though.
      • eru 16y ago
        Why did you use state?
• mavxg 16y ago
  Cracked it http://github.com/mavxg/chaocipher/blob/master/chaocipher.hs http://github.com/mavxg/chaocipher/blob/master/chaocipher.hs
  • Groxx 16y ago
    (have not run, but from the description) : Impressive work :) If you manage to get plaintext from just cyphertext, be sure to spread it around; I'd imagine a lot of people would be interested in it.
    • mavxg 16y ago
      It doesn't quite do that yet. Given a section of known plaintext of about 50 characters it can find the original key used (or at least enough of the key to then turn the problem into a mono-alphabetic cipher).