Lemmy

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Everything about Lemmy; bugs, gripes, praises, and advocacy.

For discussion about the lemmy.ml instance, go to !meta@lemmy.ml.

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Interesting difference from Reddit: Upvotes/Downvotes are not anonymous (programming.dev)

submitted 1 year ago by o_o@programming.dev to c/lemmy@lemmy.ml

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Hey folks! Just realized something that makes Lemmy different from Reddit. Because of the federation, your votes are not technically anonymous on Lemmy. At least, I think.

Although there’s no UI to look at a user’s voting history yet, one could conceivably be built by an instance. Perhaps coincidentally, I hear there’s instances out there populated by mostly bots?

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[–] BarryZuckerkorn 1 points 1 year ago

How does the service/instance prevent someone from voting more than once, while also tallying up the total number of upvotes and downvotes?

If the service is responsible for generating the secret correlation between user and vote, and it remembers that secret, it'll be able to reverse the process to see which user voted which way. If the service chooses to forget whether someone voted before, how can you prevent someone from voting multiple times?