| Publisher | Foundation for Research and Technology - FORTH | ||
|---|---|---|---|
| Format | 61.8KB PDF | Date added | 07 Oct 2002 |
| Topics | Network Security, Security Tools, Intrusion Detection Systems | ||
| Downloads | 45 | ||
This paper considers the problem of efficient string-based signature matching for Network Intrusion Detection Systems (NIDSes). String matching computations dominate in the overall cost of running a NIDS, despite the use of efficient general-purpose string matching algorithms. Aiming at increasing the efficiency and capacity of NIDSes, the paper has designed ExB, a string matching algorithm tailored to the specific characteristics of NIDS string matching. The paper has implemented ExB in snort and present experiments comparing ExB with the current best alternative solution. The preliminary experiments suggest that ExB offers improvements in overall system performance by as much as a factor of three.
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