Reply #10: Regarding vote selling.

[eomer]

Bill Bored is right that it doesn't lend itself to vote buying, but for a very specific exception.

After the voter leaves the polling station, she keeps the part of the ballot that wasn't shredded. This is the same piece of paper that was scanned. It has only the checkmarks and some barcodes. There is nothing on this paper that indicates (to a human viewer) the order of the candidates and therefore no way to tell which candidate the checkmarks correspond to. When the voter "verifies" her vote online, all she is shown by the system is the scan image of this same slip of paper. There is no way she can demonstrate whom she voted for to someone else.

The very specific exception is that if someone has the algorithms for decrypting the barcodes and thereby interpreting the individualized candidate order of each ballot, then that person could verify bought votes online.

I agree completely with what you said about complexity.