How to build a better voting system that resists hacking

Election security and vote hacking are a hot topic. But how serious is this threat and what can be done?

Sami Saydjari, the president of Cyber Defense Agency, tells ZDNet's Tonya Hall that today's individual voting machines were not built to withstand hacking, cyberattacks, and other threats, but he also explains ways that voting systems can be better prepared.