Crazy Smart Computers

Computers can do things somewhat akin to fantasy level martial arts, in that they are in principle possible, but no living person has the ability to do them, because the precision and computation required to do so is so great.

Arthur C. Clarke said that “Any sufficiently advanced technology is indistinguishable from magic.” Here’s an example. You know those ubiquitous little LEDs on devices like speakers, card readers, microphones etc. that simply indicate that the device has power? The authors show that these LEDs can bleed information about power consumption that can be used to deduce when and for how long a computer is computing cryptographic keys and that can be used to deduce the keys. For example, using a “hijacked” security camera the author’s were able to film the power LED on a smart card reader from 16 meters away and from that able to deduce the keys. Paper here. . . .

Now some people will say, well all you have to do is make sure the LEDs are properly insulated from the main power and adjust the cryptographic algorithms to not take some shortcuts and your systems will be safe. Uh huh.

Eliezer Yudkowsky has a more realistic perspective. Although this is not about AI per se, he notes this is a good example of the kind of thing that a superintelligence could do that would not have been predicted in advance and would seem to require magical powers.

From Marginal Revolution.