Encrypt/Decrypt

hey, i have been working a lot at asp lately, and i have been wanting to make a Encryptian/Decryptian program. I don't know where to start? Say i have a text file stored in a string, what would be a fairly easy, but still effective way to encrypt/decrypt the contentents of the string?

I am not looking for code really, just want to know where to start looking, or maybe about how to go about doing this.

hey...i'm looking for the same thing too...

post it here when you get the answer okey..

I think Karl wrote a tutorial at http://www.vb-world.net/tips/tip476.html .

i'll take a look at that thanks

I found this GREAT tutorial for anyone interested:

http://www.4guysfromrolla.com/webtech/110599-1.shtml