security with optiscans. Please refer to excerpt below:
http://www.votetrustusa.org/index.php?option=com_content&task=view&id=798&Itemid=51snip
The Significance of Harri's Hack
First of all, the Hursti hack reveals only one vulnerability in an almost unlimited number of potential flaws or vulnerabilities in electronic voting systems (both op-scans and DREs). However, the Hursti hack is individually significant because the flaw it exposed is a planned vulnerability in the system, not something that is accidentally there. It had to be PUT there (programmed) on purpose. For Diebold to claim innocence about this would be absurd. It would be like saying you didn't know your garage had a door while you were standing there holding the garage door opener. Or, because this security vulnerability is so huge, it would more accurately be like saying you didn't know your house had a garage at all!!
Since something like 95% of computer scientists agree that electronic voting machines (op-scans and DREs) have an almost infinite number of potential flaws or vulnerabilities, the Hursti hack shows, above all, THE IMPORTANCE OF HAVING PAPER BALLOTS for an independent confirmation of machine results. The beauty of paper ballots is that they are completely independent of any machine, unlike the printer paper trail. Therefore, they provide a true independent, manual audit of machine results.
snip
----------
IMHO, I don't even think there should be a manual audit of machine results -- in CA, elections officials always try to match machine results; better to have a manual audit of manual results