Early voting is underway in Wayne County, Indiana. Voters showing up at the polling stations will find themselves directed to the Hart InterCivic voting machines.
A 2007 study of these machines, initiated by the Ohio Secretary of State and conducted by Pennsylvania State University, the University of Pennsylvania, and WebWise Security, Inc. found that:
the Hart system lacks the technical protections necessary to guarantee
a trustworthy election under operational conditions...Virtually every
ballot, vote, election result, and audit log is forgeable or otherwise
manipulatable by an attacker with even brief access to the voting systems.
You can read a summary of the study or read the full 335-page report.