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Table 2 Summary of feature detection points

From: Web intrusion detection system combined with feature analysis and SVM optimization

Attack techniquesFeature detection points
Case sensitive, keyword replacementDetect sensitive characters
Multiple URL encodingDetecting the form of %25%
Comment the bypass, empty byte bypass, special symbol bypassDetect the specific character of characteristics
Weak coding detectionDetect the hex encoding, char encoding, html entity encoding, unicode encoding
OverflowDetect packet length