The article talks about the author whom basically built bat scripts to take files send to a given folder, encrypt/zip them with 7-zip and send them to dropbox, and have another folder that had decrypted versions. Â Clever idea, and could be simple to implement with other systems, perhaps even modify it to use truecrypt.
http://lifehacker.com/quickly-encrypt-files-and-send-them-to-dropbox-from-the-1401457977