Secure voting came to my attention after the 2000 Bush-Gore election and recount. There's been a lot of work really interesting work since then. If you're interested in what can be done to improve voting security, I encourage you to see https://www.verifiedvoting.org
Diebold, how people hacked their voting machines, and their campaign against said hackers was mentioned on Slashdot practically weekly back then. I think http://blackboxvoting.org/ was started as a direct result.