[knuckle_cake]

I recall a similar service a few years back which went a step further and encoded the text into an image, which allowed the sender to revoke the entire message at a later time.

Google is not finding anything; maybe it's gone now.

[anthony_franco]

I think there are a few. BigString was the most popular I heard about.

[pavel_lishin]

> Until now, you’ve been the person with the least control over your emails because, after you send them, they can be stored and scanned in more places than you can imagine. Do you want anyone to permanently store your messages? Do you want your words to possibly live in infamy without your knowledge?

Um, isn't that kind of an accepted risk when giving someone something? This whole thing sounds very fishy to me, actually.

How does it work? Their about page is very very vague, and uses some double-talk to make your message seem incredibly secure (specifically, the hard-to-print FAQ entry: http://www.bigstring.com/info/faqs/answers/printed.php)