National: Senate Intelligence Committee report shows how electronic voting systems are inherently vulnerable to hackers. Fred Kaplan/Slate
Just hours after Senate Republicans blocked a vote on a bill to make elections less vulnerable to cyberattacks, the Senate Intelligence Committee released a 67-page report, concluding that, leading up to the 2016 election, Russians hacked voting machines and registration rolls in all 50 states, and they are likely still doing so. The heavily redacted document, based on a two-year investigation, found no evidence that the hackers altered votes or vote tallies, though it says they could have if they’d wanted to. However, three former senior U.S. intelligence officials with backgrounds in cybersecurity told me that the absence of evidence isn’t the same as the evidence of an absence. One of them said, “I doubt very much that any changes would be detectable. Certainly, the hackers would be able to cover any tracks. The Russians aren’t stupid.” Hacking individual voting machines would be an inefficient way to throw an election. But J. Alex Halderman, a computer scientist who has tested vulnerabilities for more than a decade, testified to the Senate committee that he and his team “created attacks that can spread from machine to machine, like a computer virus, and silently change election outcomes.” They studied touch-screen and optical-scan systems, and “in every single case,” he said, “we found ways for attackers to sabotage machines and steal votes.” Another way to throw an election might be to attack systems that manage voter-registration lists, which the hackers also did in some states. Remove people from the lists—focusing on areas dominated by members of the party that the hacker wants to lose—and they won’t be able to vote.