To quote Darkspirit from another thread:
[quote=Darkspirit]Well, in order to decrypt a message you have to find the right algorithm, try to look at it from different angles.
If that didn’t work, try to identify a part (a word, or more ) of it by guessing, build an algorithm and test it on (letter by letter, character by characer ).
If it fits then y it on he rest of the message, if not try again.[/quote]