Through the federal program, officials expect to have this deployed in at least nine additional states by November.
Officials said the effort was just the latest in steps taken to shore up cybersecurity since the 2016 presidential election.
But cybersecurity experts say the threat has hardly been dulled.
David Levine with the Alliance for Securing Democracy told committee members that many local election offices lack the resources to boost cybersecurity defenses.
The coronavirus has exacerbated the problem by forcing a number of states to divert election security funding to cover other unanticipated costs stemming from the pandemic, Levine said.