For those like to play with cryptography there are still things to crack ;-)
I.e. the CIA has the "Kryptos" sculpture and people are still seeking the solution of the last part of the text.
Good luck hunting..
And dont forget to look at the real sculpture while decoding ;-)
I think Dan Brown is going to explain it all in his sequel to the DaVinci code... :)
//http://elonka.com/UnsolvedCodes.html
There are more cyphers, including the Kryptos one,
(I'm waiting for her book, just ordered it..seems a nice brain trainer :-)