You may be interested in this episode of The Amp Hour podcast, where they talk about powerline analysis attacks: http://www.theamphour.com/239-an-interview-with

You may be interested in this episode of The Amp Hour podcast, where they talk about powerline analysis attacks: http://www.theamphour.com/239-an-interview-with-colin-oflynn-aspirated-adamantine-attacks/ http://www.theamphour.com/239-an-interview-with-colin-oflynn.... In general, it is like many other side channel attacks, where you can use the data to put constraints on the search space for a brute force attack.