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Ah. I didn't know that was something they'd be used for. (publishing, without naming someone is the only use I saw) That'd kind of defeat the point though, since anyone could check _everyone_ they can find on linkedin/imdb all at once.
Exactly. That's why I suggested either a very strong hash (to discourage bruteforcing) or a very weak one (to guarantee collisions).
If your goal is merely proof of knowledge then yes, the standard approach of publishing a hash of whatever you want plus some random padding is sufficient.
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