Chaos Computer Club talk on this (using glitter nail polish) from way back in 2014... https://www.youtube.com/watch?v=zpFKeVuP0_w https://www.youtube.com/watch

Chaos Computer Club talk on this (using glitter nail polish) from way back in 2014... https://www.youtube.com/watch?v=zpFKeVuP0_w https://www.youtube.com/watch?v=zpFKeVuP0_w The talk covers A LOT more and focusing on "evil maid" attacks.