Communication analysis system, analysis method, and recording medium

Abstract

A communication analysis system includes: an information obtainer that obtains past communication information indicating communication performed by a monitoring target; a prediction target link extractor that extracts, based on the past communication information obtained, an unestablished communication link of communication that has not been established in the past communication information, the unestablished communication link being at least one communication link that is a prediction target; a link confidence level calculator that calculates a confidence level indicating the likelihood that the unestablished communication link extracted will be established as a normal communication link in the future; and a NW graph creator that creates a NW graph, in which the unestablished communication link and information regarding the unestablished communication link are mapped, as graph information for determining whether to add the communication link to a whitelist, using the unestablished communication link extracted, the confidence level calculated, and the past communication information obtained.