PLC communication blocking equipment and PLC communication blocking method

Abstract

The invention provides PLC communication blocking equipment and method, and the equipment employs an information correlation mode to prevent power communication, employs an electronic countermeasure principle, and prevents electromagnetic conduction radiation from leaking useful information. The design of filtering, compounding other signals and the like is adopted, so that the signal intensity isinhibited, and the electromagnetic compatibility is very good; pseudo-random sequence compositing can be carried out on frequency points needing key divulgence prevention, and the protection effect is enhanced. Meanwhile, the equipment is small in size, convenient to carry and install, wide in application range and capable of being used for signal transmission in the fields of power stealing prevention and electromagnetic radiation conduction leakage of information processing equipment, such as computers, printers and copying machines; and the behaviors of stealing and divulging secrets by using the power line carrier communication as a hidden communication channel and conducting and divulging secrets by the power line through electromagnetic radiation can be effectively protected.

Description

technical field [0001] The invention belongs to the field of electrical information, and in particular relates to a PLC communication blocking device and method. Background technique [0002] Power line is the most common material medium with the widest coverage today. Power line carrier communication is based on the power line and uses the power network as a channel to realize data transmission and information exchange. The power line is the most carrier signal transmission medium, and it is a wired communication method that does not require line investment. The technology began to be used in furniture automation. Remote meter reading, broadband Internet access and other fields. A power line is equivalent to a data line. If the power carrier communication channel is a covert channel established without our knowledge, then the information security of all data processed between these devices will have no secret to protect, which will bring great security risks. Contents ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of easy leakage in the existing power line carrier communication technology, the present invention provides a PLC communication blocking device, including a casing and a signal blocker, the signal blocker is fixedly installed inside the casing, and the side of the casing is set There are multiple sets of USB interfaces; the signal blocker includes clock source, FM splitter, wave rectifier controller, pseudo-random sequence multiplexer, signal modulator, and signal output port in turn, and is electrically connected in turn

Images