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Data unidirectional lead-in method and system

A data and one-way technology, applied in the field of information security, can solve problems such as cumbersome use, complicated deployment, and high price, and achieve the effects of low hardware cost, improved transmission efficiency, and low cost

Inactive Publication Date: 2013-10-02
INST OF INFORMATION ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] At present, most of the one-way imported devices are system-level applications, which are complicated to deploy, expensive, and cumbersome to use

Method used

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  • Data unidirectional lead-in method and system
  • Data unidirectional lead-in method and system

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Embodiment Construction

[0048] The present invention will be described in detail below through specific embodiments and accompanying drawings. Firstly, the format and protocol of data packet transmission are briefly described, and then the algorithm implemented by the system is explained from the two aspects of the sending end and the receiving end, and finally the specific implementation method is given in combination with the algorithm described above.

[0049] 1. Packet transmission

[0050] The system is divided into two parts: the sending end and the receiving end. The sending end automatically reads the data in the mobile storage medium, splits and encapsulates it, and sends it to the receiving end. The receiving end restores and reassembles the file according to the data type in the following packet format. The communication between the transport layer adopts UDP protocol.

[0051] 1.1 Packet format

[0052] like figure 1 As shown, the format of the communication data packet mainly include...

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Abstract

The invention relates to a data unidirectional lead-in method and a system. According to the method, a UDP (User Datagram Protocol) communication protocol is adopted on a transport layer between a sending end and a receiving end; the sending end is used for reading data in a removable storage medium, fractionating the data on the basis of the data type and encapsulating the data into a data package; the encapsulated data package are sent to the receiving end through an optical fiber transmission channel; documents are restored and reassembled by the receiving end according to the data type in the data package. The sending end of the system comprises a communication module, an outer end lead-in module and an inner end lead-out module. According to the data lead-in method and the system, a sending mechanism based on the optical fiber transmission channel is adopted, the unidirectionality of the information flow is ensured on physical layer and application layer aspects, the system deployment is simple, the utilization is convenient, and the stability and reliability are high.

Description

technical field [0001] The invention belongs to the technical field of information security, and specifically relates to a one-way data import method and system, which are used for importing data sheets in a low-density mobile storage medium into a high-density system such as a secret-related computer, so as to realize security isolation and information exchange. Background technique [0002] With the development of information technology, the use of computers is becoming more and more common. But at the same time, it also brings threats to information security. As far as my country's current information security technology level is concerned, physically isolating confidential systems is a good solution. But while physical isolation solves information security, it also brings difficulties in information exchange. [0003] The BLP model of computer security and confidentiality stipulates that low-level data can be written into high-level systems, but high-level data cannot b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32H04L29/06
Inventor 冯维淼张萌黄伟庆张珠君刘浩杨文
Owner INST OF INFORMATION ENG CHINESE ACAD OF SCI
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