• 1. Type text (post note) and get a link for it
• 2. Send the link (email, twitter) to the recipient
• 3. As soon as the recipient reads it, the note will be destructed
• 4. Your note could be password protected too
• 5. You can attach a file to your note. It will be automatically deleted after the first downloading

E.g.: publish replies in Twitter destroyed after being read. So you will have secure notes in the public timeline!