Adaptive junk message filtering system

摘要

A data filtering system comprises a first filter for filtering one or more messages and a second filter for filtering the messages. The first filter is associated with a false positive rate and a false negative rate and the second filter is evaluated based at least in part on the false positive rate and the false negative rate of the first filter. The data used to determine the false positive rate and the false negative rate of the first filter is utilized to determine a new false positive rate and a new false negative rate associated with the second filter as a function of threshold. The second filter is employed in lieu of the first filter upon a threshold where the new false positive rate and new false negative rate of the second filter together are considered better than the false positive and the false negative rate of the first filter.