Ranking cyber threats: CISA chief Jen Easterly

Just a few years ago, we were worried about non-state actors like ISIS carrying out major cyberattacks. Is there still a threat?

"Low probability, but high impact," US cybersecurity chief Jen Easterly tells Ian Bremmer on GZERO World. Also, attacks by non-state actors are harder to verify.

The bigger problem, she adds, is the dozen or so states that are using cyber to do sort of lawful things like collecting intelligence, but then go about using such tactics for nefarious purposes.

And we don't have many rules in place to deal with that.

Watch the GZERO World episode: Hackers, Russia, China: cyber battles & how we win