[simias]

That's security through obscurity. You want any citizen to be able to audit the security of the device, if you have to trust the government or some institution then what's the point?

There are better ways to make sure your vote got registered properly, for instance http://www.nytimes.com/2004/03/02/science/did-your-vote-coun...

After voting, each voter would receive a receipt -- a record of his choices that would be encrypted, or put into code, and could be deciphered only by a collaboration of all the election trustees. After polls closed, all receipts would be posted on the Internet. Each voter could use his serial number to find the image of his receipt, and make sure it matched the one he carried.

Not foolproof but still better than what we have now.