FIELD: information technology.
SUBSTANCE: method includes tracking data of events associated with a consumer, which are associated with certain keys. To effectively access data, correlated event pairs are determined, for each of which a set of keys is provided, sets of counters are selected for at least part of the pairs of keys having an end key, the counter is increased for each pair of keys and the probability of occurrence of another event with participation of the user is determined from the counter values.
EFFECT: high efficiency and reliability of processing a transaction by checking it for fraud.
70 cl, 18 dwg
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