Renée DiResta of the Stanford Internet Observatory talked at Black Hat USA 2020 about 'hacking public opinion' through disinformation campaigns and how nation-state hackers have launched 'reputational attacks' against enterprises. In her Black Hat USA 2020 keynote, Renée DiResta of the Stanford Internet Observatory explains how nation-state hackers have launched ‘reputational attacks’ against enterprises. When it comes to nation-state disinformation campaigns on social media, U.S.