S. local executive businesses, in accordance programmers National Security Agency documents received by programming Intercept. 77 On at least one occasion, hackers installed malware on programming laptop of an Arizona county election official, giving hackers access programmers login tips that can be used programmers breach county voter registration databases. 78 Twenty one counties in North Carolina use instrument produced by VR Systems, adding Durham County, which experienced programming malfunction of laptops used programmers ascertain voter registrations across assorted precincts last year, though local officials hold that programming challenge was unrelated programmers Russian hacking. 79 In order programmers ensure programming accuracy and accessibility of voter registration lists during voting intervals, states should set up paper based contingency plans during early voting and on Election Day in case of system disasters or hacks. For example, each local polling place have to have paper copies of its voter registration lists on hand that may be consulted throughout programming voting technique.