Visa Inc.
SYSTEM, METHOD, AND COMPUTER PROGRAM PRODUCT FOR GENERATING ENHANCED N-GRAM MODELS

Abstract:

A method, system, and computer program product is provided for generating enhanced n-gram models for use with monitoring systems. The method includes determining that a leading pair of characters of a first data string does not match a leading pair of characters of a second data string and inserting a placeholder character at a first-index position in each data string. The method further includes inserting a placeholder character between each character pair of the first data string in which a first character matches a character of the second data string at a same index position and in which a second character matches a character of the second data string at an index position immediately following a same index position, and generating a similarity score based on the length of the data strings and triggering a remedial process in response to the similarity score exceeding a predetermined threshold.