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Keyword extracting method for network unknown application

A technology for extracting methods and keywords, which is applied in the field of network security and can solve problems such as confusion

Inactive Publication Date: 2009-07-22
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, words that appear frequently in the data content of the application layer are also easily confused as keywords.

Method used

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  • Keyword extracting method for network unknown application
  • Keyword extracting method for network unknown application
  • Keyword extracting method for network unknown application

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings.

[0023] The invention adopts a data mining method to extract keywords from application layer data of unknown applications. A specific implementation method such as figure 1 As shown, it includes the following steps:

[0024] 1. Collection of samples

[0025] Samples are collected from the same unknown application to form a sample set, each of which is a session record of this application; these session samples are further divided into sample subsets, and the session samples contained in each sample subset should have something in common, for example, for client-server applications, all sessions in this sample subset have the same server IP address and port number; for P2P applications, all sessions in this sample subset occur at between a given set of IP addresses. Assume that there are N>1 sample subsets in the sample set, and M>N session samples. In order to make...

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Abstract

The invention provides a method for extracting application layer protocol key words from an unknown application layer data, the method can implement the data excavation of the key words by annotating the positions of characters in the conversation and the message and defining the general-purpose degree and the supporting degree of the character string. The key words extracted by the invention can be used for unknown applied characteristic analysis and type recognition, the classification controls comprising the service based on content, classification rate control and abnormal flow filtering and so on for the application can be implemented based on the recognition.

Description

technical field [0001] The invention belongs to the technical field of network security, in particular to a technology for extracting keywords of unknown application layer protocols in the network. technical background [0002] New applications and attacks in the network are constantly emerging, many of which have no standard documents to check. The existing methods are to manually analyze the unknown application layer data to discover some of its character string features. To analyze its application layer protocol process is a more difficult problem. The method of data mining is used to extract the frequent item sets contained in the data of the unknown application layer, so that the keyword set of the unknown application can be discovered through an automatic method, and the keyword set mined out can be used to study and analyze the unknown application layer protocol. Implementation process. Furthermore, the obtained keyword set can be used to identify the application, ...

Claims

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Application Information

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IPC IPC(8): H04L9/36H04L29/06
Inventor 余顺争
Owner SUN YAT SEN UNIV
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