Found it on Twitter: https://twitter.com/Renaud_Sand/status/1369429492121415682/photo/1

Here's part of the text, if you don't want to click:

"In our paper, we raised concerns about a number of potential vulnerabilities that remain in our election infrastructure. Voting systems are outdated, and many of them do not have a paper record of votes. Without a paper record, there is no way to reliably audit a vote tally and confirm that numbers haven't been changed. We found that thirty states are paperless voting machines in some jurisdiction, and the five states use them exclusively, leaving them vulnerable to manipulation that cannot be reconciled and reversed. We also found that many of our election systems are connected to the internet, leaving them open to hacking. Even systems not regularly connected to the internet are nevertheless updated by software that must be downloaded from the internet.

It's misleading to suggest the impenetrable cybersecurity is possible; our focus must be on defending against, detecting, deterring, managing, and mitigating any effort to do us harm. There's a grim joke: Knowing you've been hacked. The truth hurts - but we simply can't afford to be naive."