https://privnote.com/
Want to be a secret agent... or just act like one :) Privnot will self-destruct once read...
About Privnote
Have you ever wanted to send confidential information within your work environment, to family or friends, but were afraid to do so over the internet, because some malicious hacker could be spying on you?
Privnote is a free web based service that allows you to send top secret notes over the internet. It's fast, easy, and requires no password or user registration at all.
Just write your note, and you'll get a link. Then you copy and paste that link into an email (or instant message) that you send to the person who you want to read the note. When that person clicks the link for the first time, they will see the note in their browser and the note will automatically self-destruct; which means no one (even that very same person) can read the note again. The link won't work anymore.
You can optionally choose to be notified when your note is read by leaving your email and a reference for the note.
Concerned about privacy:
How the notes and its contents are processed
The link is generated in the user's browser and at no time is sent as such to Privnote. The link is thus in the sender's (and later possibly in the recipient's) hands only. Therefore, there is no way to recover a note if a Privnote user losses the link.
Since only the link binds the decryption key to the note's content and since Privnote does not have the link, at no time is any note held in any readable format state at Privnote. This assures that nobody (including Privnote's administrators) can read a note.
When a note is retrieved, its data is completely removed from Privnote, which implies there is absolutely no way to recover it again.
When a note is not retrieved after 30 days, Privnote removes it permanently, just as if it were read.
Privnote sysadmin team will do as much as possible to protect the site against unauthorized access, modification or destruction of the data. But, even if someone or something could manage to gain access to the database, they would be unable to read the notes since their contents are encrypted and can't be decrypted without the links which Privnote never has a hold of.
