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Method for separating known protocol multi-communication-parties data stream into point-to-point data stream

A data flow and multi-communication technology, applied in the direction of electrical components, transmission systems, etc., can solve the problems of monitoring and detection of channels that cannot steal secrets, and achieve good results and simple principles

Inactive Publication Date: 2015-07-01
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the current information warfare scenario, the threat of being stolen by the enemy through imported devices or special Trojan horses is becoming increasingly serious. The way of such stealing is usually to send confidential information through wireless communication, and the protocols used in this communication are very However, the existing preventive measures are basically only for known protocols, and most of them are based on port mapping or static feature matching, which cannot monitor and detect this type of stealing channels.

Method used

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  • Method for separating known protocol multi-communication-parties data stream into point-to-point data stream
  • Method for separating known protocol multi-communication-parties data stream into point-to-point data stream
  • Method for separating known protocol multi-communication-parties data stream into point-to-point data stream

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Embodiment 1 realizes for the concrete algorithm of the present invention:

[0082] For step S11,

[0083] Data input: a mixed unknown protocol data frame with n rows and m columns.

[0084] Algorithm goal: Calculate the number k of types of protocols as accurately as possible.

[0085] Its specific algorithm implementation:

[0086] (1) Define the smallest processing unit object: OneByte, the attributes are:

[0087]

[0088] (2) Create a two-dimensional array of n rows and m columns of OneByte, assign the content of each byte of the input data frame to the oneByte field of the OneByte object, and record the row and column where the byte is located.

[0089] (3) Loop through the OneByte two-dimensional array, count by column, and count the number of occurrences of each byte in each column and which rows have this byte. Record the number of occurrences, record it as num, and add the rows that have appeared to the alist collection of OneByte, so that you can get t...

Embodiment 2

[0121] Embodiment 2 is concrete experimental verification:

[0122] For step S11, the calculation experiment of the number of protocol types:

[0123] (1) Data input: 27 kinds of protocols in Tcpdump, each takes 100 data frames, all of which are less than 100; take the first 68 bytes of each data frame; mix the obtained protocols as input.

[0124] (2) Values ​​of variable that can be set: liminal, low_liminal, uniterate. Liminal is set to 95, low_liminal is set to 10; the minimum value of uniterate is 50, and the maximum value is 99;

[0125] Experimental results:

[0126] The experiment uniterate takes the corresponding K value from 50 to 99 records, the following is the brief experiment result of liminal=95; low_liminal=10; uniterate=99 (one experiment):

[0127] The maximum frame length is: 68;

[0128] Total number of frames: 2509;

[0129] Number of column stats: 68;

[0130] The number of sets in the candidate result set: 62;

[0131] The number of collections in...

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Abstract

The invention discloses a method for separating known protocol multi-communication-parties data stream into point-to-point data stream. The method comprises the steps of S1, dividing the mixed unknown multi-protocol data stream into a single-protocol data frame, namely, dividing the mixed unknown multi-protocol data stream into the single-protocol data frame by the cluster algorithm, and determining that the obtained class cluster is relatively credible single-protocol data frame by the evaluation algorithm; S3, dividing the separated single-protocol data frame into point-to-point data frame according to the address, namely, finding out an array with address features to form address pair candidate sets, and splicing the address pair candidate sets to obtain the final address pair. According to the method, the entropy-based class cluster evaluation method is applied to the protocol cluster evaluation; the method is simple and effective to find out the known protocol address information and has a good effect.

Description

technical field [0001] The invention relates to a method for separating data streams of unknown protocol multi-communicating parties into point-to-point data streams. Background technique [0002] In the current information warfare scenario, the threat of being stolen by the enemy through imported devices or special Trojan horses is becoming increasingly serious. The way of such stealing is usually to send confidential information through wireless communication, and the protocols used in this communication are very However, the existing preventive measures are basically only for known protocols, most of which are based on port mapping or static feature matching, which cannot monitor and detect this type of stealing channels. Aiming at the above problems, this project intends to propose an unknown protocol discovery method based on the fingerprint relationship of datagrams, laying a technical foundation for the monitoring methods of such stealing channels. Contents of the i...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L29/12
CPCH04L67/104H04L69/08
Inventor 郝玉洁周洪川刘渊张凤荔张俊娇
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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