-- Ten states -- Colorado, Delaware, Kentucky, Louisiana, New Jersey, South Carolina, Tennessee, Texas, Utah, Virginia -- received failing grades in three of four voting security areas.

-- Of the 24 states using direct recording electronic (DRE) machines, only three -- California, Indiana and Ohio -- get satisfactory grades in all four categories, the report said. Colorado, Delaware, Louisiana, Nevada, Texas, Utah, Virginia and West Virginia have no state-mandated requirement for emergency paper ballots to be available in precincts that use voting machines, in the case of voting machine failure.

-- Nine states -- Alabama, Illinois, Kentucky, Maine, New Jersey, South Carolina, Texas, Utah and Virginia -- have requirements for ballot accounting that "fall far short" of the groups' recommended best practices.

-- Eighteen states, including Florida, New York, Texas and Virginia, do not have adequate requirements in place for paper-record backups to e-voting or other nonpaper voting methods. Voter verified paper records allow states to conduct recounts of voting machine totals, supporters say.

-- Another 27 states, including New York, Michigan, Virginia and Georgia, do not have adequate provisions in place for conducting post-election audits of voting results, the report said.