Advocates for electronic voting say paperless ballots save money and eliminate problems common to old systems. But the technology brings a new breed of security concerns, like software glitches or hackers that could make the results unreliable.
In California, new security measures range from random tests of touch-screen machines by independent computer experts to a recommendation that poll workers prevent voters from carrying cell phones or other wireless devices into booths.
At least 10 million people in at least two dozen states were expected to cast primary ballots on machines built by Diebold, Sequoia Voting Systems, Electronic Systems & Software and other vendors.
Read more at the Star Tribune.