622 research outputs found
An Immune Inspired Approach to Anomaly Detection
The immune system provides a rich metaphor for computer security: anomaly
detection that works in nature should work for machines. However, early
artificial immune system approaches for computer security had only limited
success. Arguably, this was due to these artificial systems being based on too
simplistic a view of the immune system. We present here a second generation
artificial immune system for process anomaly detection. It improves on earlier
systems by having different artificial cell types that process information.
Following detailed information about how to build such second generation
systems, we find that communication between cells types is key to performance.
Through realistic testing and validation we show that second generation
artificial immune systems are capable of anomaly detection beyond generic
system policies. The paper concludes with a discussion and outline of the next
steps in this exciting area of computer security.Comment: 19 pages, 4 tables, 2 figures, Handbook of Research on Information
Security and Assuranc
Information Fusion for Anomaly Detection with the Dendritic Cell Algorithm
Dendritic cells are antigen presenting cells that provide a vital link
between the innate and adaptive immune system, providing the initial detection
of pathogenic invaders. Research into this family of cells has revealed that
they perform information fusion which directs immune responses. We have derived
a Dendritic Cell Algorithm based on the functionality of these cells, by
modelling the biological signals and differentiation pathways to build a
control mechanism for an artificial immune system. We present algorithmic
details in addition to experimental results, when the algorithm was applied to
anomaly detection for the detection of port scans. The results show the
Dendritic Cell Algorithm is sucessful at detecting port scans.Comment: 21 pages, 17 figures, Information Fusio
Dendritic Cells for Anomaly Detection
Artificial immune systems, more specifically the negative selection
algorithm, have previously been applied to intrusion detection. The aim of this
research is to develop an intrusion detection system based on a novel concept
in immunology, the Danger Theory. Dendritic Cells (DCs) are antigen presenting
cells and key to the activation of the human signals from the host tissue and
correlate these signals with proteins know as antigens. In algorithmic terms,
individual DCs perform multi-sensor data fusion based on time-windows. The
whole population of DCs asynchronously correlates the fused signals with a
secondary data stream. The behaviour of human DCs is abstracted to form the DC
Algorithm (DCA), which is implemented using an immune inspired framework,
libtissue. This system is used to detect context switching for a basic machine
learning dataset and to detect outgoing portscans in real-time. Experimental
results show a significant difference between an outgoing portscan and normal
traffic.Comment: 8 pages, 10 tables, 4 figures, IEEE Congress on Evolutionary
Computation (CEC2006), Vancouver, Canad
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