High-security data one-way isolation synchronization method

Abstract

The invention relates to a high-security data one-way isolation and synchronization method. The method comprises the following steps: monitoring whether a source database has data table addition, deletion and modification operations or not; acquiring updated data as cache data; sending the updated data to a synchronous database; by the computer of the synchronous database, receiving the updated data and then confirming receiving through the CTS line; by the computer of the source database, judging whether the computer of the synchronous database receives the updated data or not through the CTS line level, and if the computer of the synchronous database receives the updated data, clearing the cached data; otherwise, retransmitting the updated data. Real-time one-way data synchronization from the intranet database to the extranet database at different security levels is realized by virtue of the serial port data line, the security is high, the real-time performance is good, and the cost is low; and, in addition, the operation process and the operation data during addition, deletion and modification of the database are read through the front-end processor running in a time-sharing mode, and dual guarantee of consistency of the target database and the source database is achieved.

Description

technical field [0001] The invention belongs to the field of information security, and in particular relates to a high-security data one-way isolation and synchronization method. Background technique [0002] In the field of information security, when computer networks with different security levels need to transmit data from a computer network with a high security level, that is, an intranet, to a computer network with a low security level, that is, an external network, it is necessary to synchronize the data of the internal network database to the external network database. The conventional method is to use a one-way network isolation device for data communication between the internal network computer and the external network computer. The one-way network isolation device is a special network physical isolation device, and the data synchronization between the internal and external computers is carried out through the network isolation device to achieve the synchronous upda...

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Problems solved by technology

[0003] The one-way network isolation device can complete the data synchronization between computer networks with different security levels, but it also has the following defects: (1) the one-way network isolation device is a special device with high cost; (2) the one-way network The communication protocol of the isolation device needs to be customized according to the requirements of the manufacturer, and the computers on both sides of the inside and outside need to be equipped with corresponding special software to complete the communication between the inside and outside computers; (3) Data synchronization can only be carried out locally, such as synchronization to a remote database. Corresponding hardware equipment support, such as the local data receiving computer, encrypted communication device and other equipment that need to be linked to the remote computer, the equipment cost and maintenance cost are relatively high

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