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Video information electromagnetic leakage interference defending method and device

A technology for video information and protective devices, applied in the field of information security, can solve the problems of leakage, inability to effectively prevent video information, etc., and achieve the effects of protecting sensitive information, improving unpredictability, and improving randomness

Active Publication Date: 2014-06-25
INST OF INFORMATION ENG CHINESE ACAD OF SCI
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  • Description
  • Claims
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Problems solved by technology

[0005] The present invention provides a video information electromagnetic leakage interference protection method and device to solve the technical problem in the prior art that video information cannot be effectively prevented from leaking in the form of electromagnetic radiation

Method used

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  • Video information electromagnetic leakage interference defending method and device
  • Video information electromagnetic leakage interference defending method and device
  • Video information electromagnetic leakage interference defending method and device

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Embodiment 1

[0075] Embodiment 1 of the present invention provides a video information electromagnetic leakage interference protection method for computer video information, to describe the specific implementation process of the embodiment of the present invention in detail, see Figure 4 :

[0076] Step 401: Initialize the dot matrix font library.

[0077] In this embodiment, the dot-matrix font is a Chinese-character dot-matrix font. In this step, firstly, the dot-matrix font is initialized, and the font is loaded from a non-volatile storage medium into a high-speed dynamic storage medium and stored.

[0078] Step 402: Generate a true random number index table according to the trigger condition.

[0079] In this step, the true random sequence generated by the true random sequence generator is truncated into M true random numbers of N bits according to every N bits, N satisfies 2N≥L, L is the number of characters in the dot matrix font, and M represents The length of the index table, M,...

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Abstract

The invention provides a video information electromagnetic leakage interference defending method and device. The method comprises the steps that a true random sequence is generated; the true random sequence is converted into a true random number index table; a dot matrix word stock is loaded and stored; dot matrix information in the dot matrix work stock is read according to the true random number index table; and the dot matrix information and traveling field synchronizing signals are subjected to synchronization, and then interference signals are obtained and output. A related interference mode based on the true random number is provided for modulation of the interference signals, the randomness and the unpredictability of the interference signals are improved, the interference signals cannot be tracked or demodulated, the problem that a stealing side uses various digital signal processing methods for restoring useful information from the interference signals can be effectively avoided, and accordingly the purpose of sensitive information protecting is achieved.

Description

technical field [0001] The invention relates to the field of information security, in particular to a method and device for preventing electromagnetic leakage interference of video information. Background technique [0002] Computers will emit electromagnetic signals when displaying video information, and this electromagnetic signal is unencrypted. This leaked video electromagnetic signal can be restored into easy-to-read information through simple receiving and restoring equipment, resulting in information theft. [0003] The method for preventing information theft caused by computer electromagnetic signal leakage in the prior art is mainly to equip a computer processing sensitive information with a video jammer for protection. Traditional video jammers are generally based on white noise or pseudo-random numbers as the source of interference. However, since the statistical characteristics of white noise are significantly different from those of video signals, the method of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/71
CPCG06F21/556
Inventor 朱海涛张超范伟黄伟庆冯进伟王晶晶
Owner INST OF INFORMATION ENG CHINESE ACAD OF SCI
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