A private waterfall-matching protocol using oblivious PRF with blind key rotation and differentially private dummy padding lets two parties compute aggregate conversion sums over multiple identifier types without revealing cross-identifier links or exact intersection sizes.
On deploying secure computing: Private intersection-sum- with-cardinality,
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PrivacyGo: Privacy-Preserving Ad Measurement with Multidimensional Intersection
A private waterfall-matching protocol using oblivious PRF with blind key rotation and differentially private dummy padding lets two parties compute aggregate conversion sums over multiple identifier types without revealing cross-identifier links or exact intersection sizes.