This message will self-destruct, part 2

I have been writing some time ago on this very subject, but it is very intriguing, thus I dare to follow on. A new way of keeping private correspondence private

AP (the Economist) WHEN Barack Obama became American president, one of his first tussles with White House lawyers was over whether he could keep his beloved BlackBerry. (Yes, he did.) The reason why the lawyers were wary was that e-mail cannot be destroyed. People do not know where the information they are sending is being stored and when, if ever, it is deleted. Such unknowns make it possible for seemingly long-gone data to turn up in a court under the order of a subpoena, or worse, in the hands of a hacker. On August 13th, though, a team of computer scientists led by Roxana Geambasu of the University of Washington, Seattle will unveil to the 18th USENIX Security Symposium in Montreal an e-communications system that destroys messages soon after they have been sent.

http://www.economist.com/sciencetechnology/tm/displaystory.cfm?story_id=14162535