Patent ID: 7318178
Filing Date: 2008-01-08
Classification: H04L

Abstract:
1. A method for correlating a number of indicators in a rules-based correlation system, wherein a plurality of indicators expected to relate to a problem are correlated over a window of time, the method comprising: detecting transitions in each indicator between a first state and a second state, which transitions occur during all or part of the window of time; counting the number of transitions detected for each indicator; comparing the number of transitions for each indicator to the number of transitions counted for the other indicators; correlating transitions of indicators to determine a correlation factor based on the comparison so that indicators which are not changing together are less likely to be correlated by a rule employed in the rules-based correlation system; determining a transition factor based on the transitions in each indicator between the first state and the second state occurring during all or part of the window of time, wherein the transition factor represents a ratio between a number of times the indicators transitioned together to a total number of indicators; applying the transition factor to the correlation factor to produce a new correlation factor; and sending an alert message to an administrator if the new correlation factor exceeds a threshold.