Opera today announced their latest feature, Face Gestures. Although it’s meant to be an April Fool’s joke (don’t miss the video), it’s not that far from what could be. Heise online, a renowned German news site, reports on secret services utilizing reserved bits in the Internet Protocol (IP) to mark conversations that have been tapped.
On another note, it has been acknowledged for a long time that geo coordinates can be used as a side channel. At least the CIA is known to transmit secret messages by letting their agents deliberately drive a predefined route in selected vehicles.
