CALEA is the terrible US federal law that requires that all switches that carry voice-traffic be built with an easy-to-access remote wiretapping capability so that cops (or bad guys who know cop secrets) can listen in on your voice conversations without cooperation from the phone company. A team of University of Pennsylvania researchers (already notorious for finding flaws in the previous version of the CALEA standard that let callers lock out wiretaps) have found a solid theoretical attack against the newer, shinier CALEA standard.
"We asked ourselves the question of whether this standard is sufficient to have reliable wiretapping," said Micah Sherr, a post-doctoral researcher at the university and one of the paper's co-authors. Eventually they were able to develop some proof-of-concept attacks that would disrupt devices. According to Sherr, the standard "really didn't consider the case of a wiretap subject who is trying to thwart or confuse the wiretap itself."
How to Deny Service to a Federal Wiretap
It turns out that the standard sets aside very little bandwidth -- 64K bits per second -- for keeping track of information about phone calls being made on the tapped line. When a wire tap is on, the switch is supposed to set up a 64Kbps Call Data Channel to send this information between the telco and the law enforcement agency doing the wiretap. Normally this channel has more than enough bandwidth for the whole system to work, but if someone tries to flood it with information by making dozens of SMS messages or VoIP (voice over Internet protocol) phone calls simultaneously, the channel could be overwhelmed and simply drop network traffic.
That means that law enforcement could lose records of who was called and when, and possibly miss entire call recordings as well, Sherr said.
Behold, the Blue Marlin, a “semi-submersible heavy lift ship” that is capable of hoisting and transplanting other, full-sized ships (that is ships as big or bigger than a US Destroyer-class vessel) all around the oceans.
Mister Alphabet is an action-figure designed to cleverly bend and contort into every letter of the Latin alphabet; the website is long on trademark warnings and arty Instagram photos, but short on details, like, “Is this an object of commerce?” and “If so, where does one buy it?” (via Kottke)
Phone chargers usually only deliver a few volts of juice at a feeble amperage, but they’ll deliver a lot more if you give them the chance. The BBC writes that a UK man died in the bathtub after being shocked by a charger connected to an extension cord. Richard Bull, 32, died when his iPhone […]
When you can’t wait for the world’s longest meeting to end, the mindless leg bouncing makes your boredom obvious and just annoys everybody else. Everyone knows the TPS reports need the damn cover sheet, but some sadistic colleague keeps forgetting, probably on purpose just to eat into your lunch hour. Enough is enough!While serving a […]
What could be more fun than a slingshot that shoots tiny airplanes? A slingshot that shoots tiny glowing airplanes of course! These toy planes are outfitted with ultra-bright LEDs, so you can fly all night without losing them in the trees.Whether you are a regular-sized child, or an overgrown adult one, these light-up flyers offer […]
You know the drill. You go to the dentist and they ask you how often you floss. You lie through your teeth and say, “every day!” (Bonus points if you have some cilantro or chives stuck in your gums from lunch). You don’t want to keep up the charade any longer, but rubbing that tiny strand […]