Elections security experts say that it is too late to do much to protect our voting systems against tampering for the midterms. The Department of Homeland Security’s efforts to spur ballot integrity upgrades are focused on 2020, but being future-minded is only an illusion: The hackers will always be ahead.

When you’re talking about a set of processes as varied as how different states and districts vote—whether they still use outdated and vulnerable machines that leave no paper trail, or store their registration data insecurely online—there’s really no way to either prevent—or detect—ballot interference with anything like absolute certainty.