I am looking to write a small proxy for AOL Instant Messenger to in-line encrypt/decrypt messages to and from certain users. It should automatically pass through everything except the message content of the selected messages, where it will take the original message content and then encrypt/decrypt the text as appropriate.
My question is does anyone either already have a script to do this, know of some libraries which might help me do this, or a good book/website to help me with this?
Thanks in advance!!!