I've decided to make an addon that will provide users with an option to encrypt the data that they save, so they will need to provide the password to retrive the data.

I'm not that good with encryption, but I know some basics.

I'd appriciate any examples, or tips (note: I don't want to need to use a DLL).

Thanks in advance. grin

Example just in case:

3 or 4 people use the same computer, same mIRC, ect.
#1 dosen't want the others to use his data, but he has no way of encrypting it. (I.E a auto-id script, with his password stored.)
#2 finds out #1's password and 'acts' like he is #1 and messes some things up.

With the script, #1 could encrypt the data, and hinder #2 or any of the others from using his auto-id (just the data would need to be encrypted.