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Cardinality is a harsh mistress

Mikael Kullberg - 06/04/2025

This was originally supposed to be a quick summary on why privacy mechanisms such as Divvy Up wouldn't work for DNS TAPIR. Divvi Up provides diffferential privacy (DP) for, mainly scalar values, by obscuring the true values across multiple independent, non-colluding servers. Turns out, the question touches on several core features...