The way of attack signature detection has advantage of high accuracy.

基于攻击特征的检测具有准确性高的优点；

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Complicated signature detection improves false positive rate compared with single signature detection.

本文提出的复杂特征值检测算法降低了单一特征值检测的误报率。

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For intrusion pattern based signature detection, an improved quick multi-pattern matching algorithm is adopted, which can search for multiple patterns by scanning the packet once.

对基于入侵模式的特征，采用了一种改进的快速多模式匹配算法可以一次在包的负载中查找多个入侵模式。

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This growth in number can be attributed to malware authors crafting their infected or trojanized applications to defeat anti-virus signature detection, distributing their malware in different application names, and trojanizing widely popular applications.

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These techniques help criminals evade signature-based detection and stay on the network.

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In general, the signature-based security products used to defend enterprise networks, such as firewalls, anti-virus products and intrusion detection systems are increasingly blind to modern attack methods, which are increasingly embedded into application data or designed to self-mutate in order to evade detection.

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