The State of Kentucky has pulled out of the Interstate Crosscheck System, Gizmodo has learned, making it the eighth state to quit the program so far—even though it cost nothing to participate. A source with direct knowledge of the decision told Gizmodo that Kentucky never used the data that it received from Crosscheck for the purpose of purging voter rolls because the data was “unreliable.” Kentucky Secretary of State Alison Grimes also expressed concern about the security of the program, the source said. Kentucky officially quit Crosscheck in June but made no official announcement at the time. A tweet by Grimes last week about Kentucky not submitting voter data to Crosscheck initially puzzled activists who were unaware of the state’s decision.
Kentucky joined the program under the previous secretary of state, Trey Grayson, primarily because it was free. The data returned by Crosscheck, however, contained mostly false positives. “On the surface of it, it sounds like an okay thing to do,” the source said. “But then you start participating, and the data is not useful.”
The program, run by the Kansas Secretary of State’s office, is meant to help identify people registered to vote in multiple states. When someone moves to a new state and registers to vote there, for example, their old registration doesn’t automatically disappear. But for every multi-registrant identified, Crosscheck generates hundreds of false positives, according to a study last year by researchers at Stanford, Harvard, Yale, the University of Pennsylvania, and Microsoft.