Ask HN: This CNN video says US Intl traced DNC hack to Russian keyboard

https://www.youtube.com/watch?v=R_-GuADLoA8

at 0.49, it says US intelligence traced the hack back to a specific Russian keyboard. It makes no sense how can any one do that? You guys have any idea?

The CIA uses special hardware to track keystrokes and installed it in many foreign computers. Essentially we hacked them and now cry foul that they hacked the DNC and discovered the fact that Clinton stole the primary. Pretty hypocritical.