Re: My exact thought
This is hardly something that can be called anonymous voting.
But then neither is the present UK system, technically. The voter number and ballot paper number are recorded on a list. In practice this is only used to provide a sort of audit of papers issued, but in a close election can be used to remove fraudulent ballots.
But it could also be used to track down the 52% for punishment...
Paper is the way to go. It provides a solid and safe audit trail, and with the supervision at all stages it's very, very hard to fix (except for the postal bit - and they're working on that). Security is tight, sealed boxes etc, and (many years ago now) when I worked a couple of times as a polling supervisor, once the polls closed and the records were written up, I had a police escort to the counting centre to hand the box to the returning officer. And the count is then overseen by representatives of the candidates. In fact, back then (late seventies in Scotland) we had a plod in the polling station all day. On overtime for 15 hours!
One odd feature of the system that I suspect most people aren't aware of...
One election the Liberal candidate brought a sweet little old lady in to vote. Asked her her number/address and checked the roll - it had already been crossed off! Oh bum! But then checked the pile of cards and found her card. So either someone had already voted for her, or she'd voted already. Checked the procedures and issued her with a PINK ballot paper. If it's close then the original paper can be removed and replaced with the pink one. We asked her if she'd already voted, and she said no, not recently - but she had voted last month (previous election was a year before!)