Improved BM Pattern Matching Algorithm for Intrusion Detection
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.
network security intrusion detection pattern matching BM-algorithm algorithm improvement
Qingzhang CHEN Yibo NIU Zhehu WANG Feng DU
College of Computer, Zhejiang University of Technology, Hangzhou, China
国际会议
黄山
英文
440-444
2010-05-28（万方平台首次上网日期，不代表论文的发表时间）