A crypto-puzzle

Posted by Arkham on October 31st, 2008


Yesterday I was reading the network security book I talked about before and I found out a funny criptography game, which took me kinda a lot of time to solve. These ciphers are simple substitution ciphers of the type that many people like to amuse themselves trying to solve. Newspapers often publish a daily cryptopuzzle (along the lines of a daily crossword puzzle) which readers try to solve — often during their daily commutes. Anyway, here it is:

Cf lqr’xs xsnyctm n eqxxqgsy iqul qf wdcp eqqh, erl lqrx qgt iqul!

Free cookies to who can solve it! As proof, you must include the md5 of the string “all_caps_solution:all_caps_nick” (double quotes excluded).
For the record, mine is f2ee0b5b3ad916313414e29ce5c578e6 ;)

This entry was posted on Friday, October 31st, 2008 at 14:34 and is filed under books, computers, thoughts. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.


5 Responses to “A crypto-puzzle”

  1. dark Says:

    You forgot to mention that you have to add a \n after “all_caps_nick” to generate your hash (otherwise yours wouldn’t be that one ;) ).
    Going back to the puzzle, it was very amusing. I guessed quickly the second token, which lead to an half-completed sentence. After some trying, I got the general meaning of it and completed the decoding in around 10 minutes.

  2. Arkham Says:


  3. Anonymous Says:

    could you post solution for the above puzzle@Arkham

  4. Arkham Says:

    Ok, the solution is:

    If you’re reading a borrowed copy of this book, buy your own copy!


  5. dark Says:

    You shouldn’t have revealed that :(