https://keybase.io/ had a pretty neat thing goin' where you basically claim your online identity to the world at large through publicly available cryptographic signing proofs that anyone can easily verify through their website or desktop app. If sources of news or science or other important public information would cryptographically prove their information came from them in a way that was easily understood by the general public then it'd hella harder to spread disinformation without it bein' tied right back to it's source or instantly dismissable due to lack of provable origin details.