"A comprehensive study of electronic voting systems (PDF) by vendors ES&S, Hart InterCivic and Premier (formerly Diebold) found that 'all of the studied systems possess critical security failures that render their technical controls insufficient to guarantee a trustworthy election'. In particular, they note all systems provide insufficiently protection against threats from election insiders, do not follow well-known security practices, and have 'deeply flawed software maintenance' practices." Some of these machines are the ones California testers found fault with last week.Update 12/19: Steve Bates of The Yellow Doggerel Democrat in comments mentioned that Colorado is addressing this problem:
DENVER (AP) — Colorado's secretary of state has declared many of the state's electronic voting machines to be unreliable, but said Tuesday that some of them could still be used in November if a software patch was installed.
Other machines that failed could be replaced with equipment certified for use in other states, Secretary of State Mike Coffman said.
Coffman met with a task force of state lawmakers to discuss what Colorado should do the day after he decertified three of the four voting equipment manufacturers allowed in the state, affecting six of Colorado's 10 most populous counties.