Title :
Improved BM Pattern Matching Algorithm for Intrusion Detection
Author :
Chen, Qingzhang ; Niu, Yibo ; Wang, Zhehu ; Du, Feng
Author_Institution :
Coll. of Comput., Zhejiang Univ. of Technol., Hangzhou, China
Abstract :
In the paper, two improved algorithms: BMLT and BMLS are proposed, in which the time complexity and space complexity of BM is improved. The algorithm of BMLT with a new pre-calculation function can increase in the movement of pattern significantly. The algorithm of BMLS can reduce the space complexity and maintain the time complexity by reducing a pretreatment function and recording the number of times that a bad char found in the pattern. Experiments indicate that the time complexity is reduced by 60% and the space complexity is reduced by 26% at most. Therefore, the improved algorithms can provide significant improvement in pattern matching performance when using in an IDS
Keywords :
Computer networks; Computer security; Costs; Data security; Educational institutions; Information security; Intrusion detection; Paper technology; Pattern matching; Space technology; BM-algorithm; algorithm improvement; intrusion detection; network security; pattern matching;
Conference_Titel :
Computational Science and Optimization (CSO), 2010 Third International Joint Conference on
Conference_Location :
Huangshan, Anhui, China
Print_ISBN :
978-1-4244-6812-6
Electronic_ISBN :
978-1-4244-6813-3
DOI :
10.1109/CSO.2010.177
