How to send Private Notes on Internet?

I found a great way of sending private note on Internet. These notes will be self destructed after being read. This service is available at Privnote. Here you have to create a post and you will get a link to that post. Send this link to your friend. This link is one time usable. As soon as person read the note you will get receipt and note will be self destructed. If you send the note by error to somebody then there is a option to destruct that note. So just visit here to see this service.