## ok, here's a toughy(atleast i think so)

ok, here is a scheme i think should be hard enough to break.
first i'll just post the crypted string, but you WILL need a hint, so i'll include one at the end.

620344603626-4-1-3-8-5-7-2-6-9
now this is simplified a bit to make it a little easier to see what's going on(the numbers after each "-" should be made to look more randomish, which can be done quite easily)