The way this sort of problem has been fixed in Texas since 2024 is to require that all ballots be sequentially numbered -- that is, they arrive at polling locations in packs of 50 or 100 ballots, each pack having sequentially numbered ballots, but the presiding judge takes 10-20 at a time, signs them, then shuffles them, places them with the serial number facing down towards the table, and voters get to pick one at random when they check in.

"In October 2022, a team of researchers published a report showing that certain ballot scanning machines used throughout the US had a critical privacy failure in how they anonymized ballots. Specifically, the machines would assign a seemingly random number to each electronic ballot record at the time of scanning to label each ballot for later auditing. However, the algorithm by which the machines generate this random number is actually deterministic and can be exactly reversed to identify the sequence in which ballots were cast.

...

Naturally, knowing the order ballots were cast is just one piece of the puzzle. But, when paired with publicly available records on the order in which voters cast their ballots (such as logbooks or poll watchers), a simple procedure exists to reconstruct the mapping from ballots back to voters."

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1. Either upgrade your pseudo-RNG's to real RNG's ($$$) or omit the "random" number from records.

2. Alternatively, just use plain paper ballots. (Yes, I know America is extra-superduper special and ordinary paper ballots that work everywhere else on the planet will never work in America. Special requirements, too many people, labour intensive, politicians hate them, the moon is in the wrong phase, etc..)

I understand there is the desire to provide a paper trail that can be used to validate results, but being able to track individual ballots back to the people who cast them is not a feature of a functioning democracy. This is the sort of thing Russia would want to do. People need to feel their secret ballots are, indeed, secret.

When I hit the term "load-bearing" in the first sentence my mind immediately turned off. Had to forcibly reengage in reading. Claude trauma is real.

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> this allows you to know whether your neighbor voted, but never who they voted for.

There's probably an angle I'm not thinking of here, but imho, it's absolutely not John Q. Public's damned business what a person does or does not do on election day.

The practice of making public whether someone has voted dates back a very long time. There were practical reasons for it when it originated, and many of those remain valid today.

Originally, everyone in town knew most everyone else and could see them physically walking into the polling place. So long before electronic records were kept, the question of who voted was public information.

Even today, I run my local polling station and I know and recognize a significant portion of the voters in my precinct.

The fact that the list of who votes is made public protects against several kinds of abuses. It goes a long way to protect against "dead people voting" and other kinds of ballot box stuffing if the list of voters is public so anyone can review it and potentially catch such abuses.

I suspect the missing angle is that people are more likely to trust claims made to the public if, in principle, those claims could be verified by the public.

Of course it's pretty impractical that a bunch of concerned citizens might gather together and check the published data against how they each remember voting. But preserving the possibility in principle makes it easier to trust the published results. It gives a would-be deceiver yet another thing to worry about.

Its a trade-off I'd have opted into had I been asked. Though I'd feel a lot better about it if I had been asked.

I was thinking the same. It's not as if visibility into whether someone voted or not has driven voter turnout significantly. Hell, I'd assumed this was private until I learned otherwise recently.

But it's such a specific structure, clearly there was an objective in mind when it was imlpemented.