Interactive publication
Back to the cataloguePrivacyCase 03 of 12
Device trajectory exposure
Ordered high-resolution trajectories are re-identifying even when individual points are not.
Class
Case to account for
Affects
1 conversion
01
Detection
Trajectory uniqueness at the chosen resolution.
02
Mitigation
01
Coarsen space/time
02
Drop order or aggregate to OD pairs
03
Affected conversions
Line/corridorH3
OPENMore in Privacy
Consent-based precision reductionDeclared unit below the precise-location thresholdDifferential privacy noise calibrationHousehold-level targeting riskK-anonymity thresholdsMinimum aggregation windowRegional privacy restrictionsResolution degradation policySmall-cell re-identification riskSparse-audience suppressionTemporal leakage