METHOD AND SYSTEM FOR ANONYMISING EVENT LOGS

The invention refers to a method and system for anonymizing event logs. It comprises extracting, from a plurality of previously registered event logs, an IP address of each event log. The IP address identifies the source that has generated the event log. It further comprises extracting, for each extracted IP address, segments of the IP address. For at least one the segments of the extracted IP address, the method calculates a sensitivity value for the segment and applies an amount of noise to the segment. The amount of noise depends on the calculated sensitivity value for the segment. In this way, the segment is masked with the noise. The masked segments of a particular IP address are merged to form a masked IP address. Then, the event logs associated to their corresponding masked IP addresses are stored in a database.