Term Kind Topic What it is
Differencing Attack Query Differencing, Reconstruction Attack concept Data Sharing & Clean Rooms Inferring an individual's data from the difference between two permitted aggregate results - the reason that returning only aggregates is not by itself a privacy guarantee.
Match Rate Bias Matched-Cohort Bias, Identity Coverage Bias concept Data Sharing & Clean Rooms The systematic skew introduced when only the identifiable subset of each party's population joins, so a shared measurement describes the matched cohort rather than the market it is quoted about.