if it's 20 years old, it's really outdated. >> reporter: bennie smith knows from experience.is an information technology expert on computer security. the d.r.e. machines came into vogue after punch card ballots created chaos in the 2000 bush versus gore election. by 2004, nearly one in three voters in the u.s. used d.r.e.s. but as the security vulnerabilities came to light, most jurisdictions got rid of them. in november, less than 10% of americans will vote using d.r.e. machines. >> the trend lines are solidly in favor of complete elimination of d.r.e.s. >> reporter: chris krebs is director of the cyber security and infrastructure security agency at the department of homeland security. >> so we have a series of security controls that are in place that can harden those systems. but ultimately, when you think about the riskiest bits of election systems, election infrastructure, to exploit these kinds of machines at scale to change an election outcome, incredibly complicated. >> reporter: but in new hampshire, the secretary of state has long believed the simple way to thwart ha