A data ferry method and system based on network isolation conditions

Abstract

The invention provides a data ferry method and system based on a network isolation condition. A power transmission line or a power supply line is used as a transmission medium; according to the scheme, the data transmission technical scheme under the network isolation condition is adopted, wherein the data transmission technical schem includes that signals are transmitted through current disturbance of an alternating current power supply line of computer equipment. A computer isolated by a network can still transmit data to the outside, a power transmission line current signal capturing device is realized, and the device is used for capturing the current signal of the power transmission line. The data is modulated into the current of a computer power supply line and can be captured and demodulated through the technical scheme. Therefore, the file transmission process is finally realized. Limitation of network isolation is effectively broken through, and ferry communication of data is realized; the problem that a conventional ferry communication means is easy to monitor and find is avoided; therefore, a relatively long transmission distance can be realized at a relatively low cost.

Description

technical field [0001] The invention belongs to the field of data transmission, and in particular relates to a data ferry method and system based on network isolation conditions. Background technique [0002] At present, the data transmission technology between two devices can be mainly divided into two categories, one is conventional methods: through IP network (wired and wireless), USB interface transmission, serial port transmission, etc. The other type is unconventional methods: video (image) ferry, electromagnetic leakage content restoration, etc. [0003] (1) IP network (wired and wireless) [0004] The most common way of data exchange between computer devices is the IP network. IP is the abbreviation of Internet Protocol in English, which means "interconnection protocol between networks", that is, a protocol designed for computer networks to communicate with each other. In the Internet, it is a set of rules that enable all computer networks connected to the Interne...

AI Technical Summary

Problems solved by technology

[0014] Prohibiting screenshots on the screen can prevent screen leaks to a certain extent. However, with the increasing number of smart devices with camera and video recording functions, leaking important company documents through screen photos has become a major hidden danger for the company.

There are still relatively few prevention and control measures for camera leaks on the market

[0015] (5) Restoration of electromagnetic leakage content

[0018] (1) In a highly sensitive environment, conventional interfaces such as network ports, USB ports, and serial ports will be blocked, so it is almost impossible to connect to a computer and transmit data through conventional interfaces;

[0019] (2) Some servers will be installed in racks, and they do not have their own dedicated monitors. They will only be connected and used when needed. Therefore, video (image) ferry and electromagnetic leakage content restoration in unconventional methods cannot be used.

Images