this post was submitted on 19 Aug 2024
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For anyone interested, there are a few papers on cryptographically secure voting, where both voter anonymity and election integrity are preserved.
Most designs consider three separate entities, where if you accumulate the information between those entities you would be able to identify a voter and his vote, but each entity on itself does not hold enough information.
The problem isn't keeping votes anonymous, that's easy. The problem is bots/spam. You could just create a new instance and then upvote a post from another instance a thousand times. If the votes are anonymous for the other instance it's tough to say if they are genuine users or just bots.
That's the main issue here, when votes are anonymous you could easily just spam votes with no way to trace it back. If it's a rogue instance then fine, you can ban the whole instance. But imagine if lemmy.world starts using fake votes in the background towards other instances.
If you are worried about duplicates, aka a single bot spamming multiple votes, then that's feasible to mitigate.
If you are worried about multiple bots spamming one vote each, that's harder to mitigate and it comes down to how the instances handles bot accounts in general. IMO it's best to ignore the bot problem and instead focus on designing a vote weighting system that favors similar instances.
Would make the whole thing even worse, as I could create several new instances with 10 bot users each, then hammer out the votes.
The entire problem is that you can't trace back each vote to a genuine user. It would be bad in case of fake instances that create 100 user accounts and upvote/downvote stuff, but you can ban the instance. It would be a disaster if a big instance creates fake votes (like lemmy.world suddenly adds 1000 fake users and uses them to manipulate other instances, if votes were anonymous you couldn't check if it's genuine lemmy.world users or fake accounts).