Some impressive work in this field has been done by Tel Aviv University. They where able to get private keys out of a laptop by merely touching the laptop [1] o

Some impressive work in this field has been done by Tel Aviv University. They where able to get private keys out of a laptop by merely touching the laptop [1] or placing a smartphone nearby [2]. [1]: http://www.tau.ac.il/~tromer/handsoff/ http://www.tau.ac.il/~tromer/handsoff/ [2]: https://www.tau.ac.il/~tromer/acoustic/ https://www.tau.ac.il/~tromer/acoustic/