The Boeing Company

Steve A Dorris

Douglas Alan Stuart

Hugh L Taylor

Mark Jonathan Handel

Brett Michael Wilson

Artificial Immune Systems (AIS) including the Dendritic Cell Algorithm (DCA) are an emerging method to detect malware in computer systems. A DCA module may receive an output or signal from multiple indicators concerning the state of at least a portion of the system. The DCA module is configured to combine the plurality of signals into a single signal vector. The DCA module may be configured to sort the received signals based on signal type and magnitude of each signal. The DCA module may then use a decay factor to weight the received signals so that a large number of 'nominal' signals do not drown out a small number of 'strong' signals indicating a malware attack. The decay factor may be exponentially increased each time it is applied so that all received signals are considered by the DCA module, but so that the &#x201c;nominal&#x201d; signals may have a minimal effect.

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Saint Peters, MO, United States of America

Steve A Dorris