As I noted below, a security researcher in Florida did a proof of concept hack on a Diebold voting box. Diebold's response:

Diebold has publicly denounced the Leon County tests as being invalid. In fact, the vendor contended that Leon County Elections Supervisor Ion Sancho's decision to sponsor the hacking attempts were potential violations of licensing agreements and intellectual property rights. In a letter to Sancho on June 8, Diebold said Sancho had committed a "very foolish and irresponsible act."

This is fucking rediculous. The integrity of a democracy cannot be the "intellectual property" of a private corporation.