Is the point of this that the recipient can only temporarily see it, and not keep going back to it?
If so, what's to stop the user doing the equivalent of “menu button and power button” on the iPhone, to take a screen shot?
If so, what's to stop the user doing the equivalent of “menu button and power button” on the iPhone, to take a screen shot?
I don't believe it's possible to securely deliver information to people you don't trust. :-)