US20220159022A1
патент
A method includes acquiring first aggregate event data for a first sub -publisher. The first aggregate event data indicates aggregate user activity across a plurality of applications associated with the first sub -publisher. The method further includes acquiring second aggregate event data for plu rality of additional sub -publishers. The method further includes determining a plurality of anomaly metric values for the first sub -publisher based on the first aggregate event data and the second aggregate event data . The method further includes determining an anomaly function value for the first sub -publisher based on the anomaly metric values for the first sub -publisher. The anomaly function value indicates a likelihood that the first sub -publisher is associ ated with fraudulent user activity. The method further
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