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Gateway stream type virus scanning method and system

A virus scanning and streaming technology, applied in the field of computer network and data communication, can solve the problem that the gateway is difficult to simulate the communication process, and it is difficult to obtain communication data to form files, etc., to achieve effective and accurate virus detection, reduce delay, and save storage resources. Effect

Inactive Publication Date: 2008-02-06
PEKING UNIV
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

For some complex application protocols, it is difficult for the gateway to simulate the entire communication process, so it is also difficult to obtain complete communication data to form a file

Method used

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  • Gateway stream type virus scanning method and system
  • Gateway stream type virus scanning method and system

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Embodiment Construction

[0049] The gateway-level streaming virus scanning system of the present invention will be described in detail below with reference to the accompanying drawings.

[0050] The flow process of the inventive method is as shown in Figure 1, and its work process is as follows:

[0051] (1) System initialization. This step includes two aspects of work, one is to initialize the data structure of the table device for storing the context information to assist in completing streaming virus scanning, and the other is to initialize the virus scanning device. Initializing the virus scanning device includes importing the virus database. During the import process, the length maxpatlen of the largest virus code in the current virus database is calculated according to the length of each virus signature code: the length of the single-mode virus signature code is the length of the signature string. The length of the pattern virus signature is calculated according to the length of the included su...

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Abstract

The invention discloses a gateway level streaming virus scanning method and the system. The method is characterized in that a dialogue data packet is organized into a data unit array; analyzing whether the data types inside the data unit support the streaming scanning operation or not and carrying out text scanning and streaming scanning operations to the data. The system includes a data flow obtaining device, a preprocessing device, a virus scanning device and a meter device of memorized context information. The gateway level streaming virus scanning method and the system disclosed in the invention improves the responding speed of the gateway to the client terminal and conserves the memorized resources of the gateway under the circumstance of assuring of carrying out effective and accurate virus inspection of the data.

Description

technical field [0001] The invention relates to a gateway-level streaming virus scanning method and system thereof, belonging to the technical fields of computer network and data communication. Background technique [0002] As the virus spreads increasingly networked, gateway-level virus filtering is getting more and more attention. The gateway-level virus filtering tool enables viruses to be detected and killed immediately at the entrance of the LAN, limiting the spread of viruses as early as possible. However, due to the limitations of traditional virus detection methods, most gateway-level virus filtering tools use file-based killing methods, that is, first reintegrate multiple network data packets into a complete file in external memory or memory, and then perform virus scan. This method needs to cache multiple data packets at the gateway first, integrate them into files to scan for viruses, and then forward them again, which will cause delays in data packets and reduc...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L12/56
Inventor 龚晓锐韦韬朴爱花
Owner PEKING UNIV
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