BARCELONA, MOBILE WORLD CONGRESS 2012 — Last night I was treated to a security demonstration. Cryptography Research director Pankaj Rohatgi pointed a cheap, standard TV antenna at an iPod Touch several feet away, running standard RSA encryption operations.
On the screen of his oscilloscope was a sound-wave generated by his custom software showing distinct troughs at semi-regular intervals. These troughs, and their accompanying flattish peaks, represented the ones and zeroes of the private keys used in every secure communication we make today, sucked right from the iPod. With no further cracking required, all of your private operations can be read as if in plain text.
How is this done? From the electronic noise generated by every microchip as it goes about its processing duties.