CN110098890A - A kind of interference signal generator, shell and shell - Google Patents
A kind of interference signal generator, shell and shell Download PDFInfo
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- CN110098890A CN110098890A CN201910355175.7A CN201910355175A CN110098890A CN 110098890 A CN110098890 A CN 110098890A CN 201910355175 A CN201910355175 A CN 201910355175A CN 110098890 A CN110098890 A CN 110098890A
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- signal generator
- interference signal
- electromagnetic wave
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/40—Jamming having variable characteristics
- H04K3/44—Jamming having variable characteristics characterized by the control of the jamming waveform or modulation type
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/60—Jamming involving special techniques
- H04K3/62—Jamming involving special techniques by exposing communication, processing or storing systems to electromagnetic wave radiation, e.g. causing disturbance, disruption or damage of electronic circuits, or causing external injection of faults in the information
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The present invention provides a kind of interference signal generator, shell and shell.Interference signal generator, for protecting electricity consumption module, wherein including random number generation unit and the first unit being connect with the random number generation unit；The frequency for the electromagnetic wave that the first unit generates is identical as the frequency of electromagnetic wave that the electricity consumption module generates, and the random number generation unit carries out amplitude modulation to the electromagnetic wave that the first unit generates.The interference signal generator carries out amplitude modulation to the output of power supply unit using random number generation unit; enter first unit through the modulated output of amplitude; the first unit is set to generate the random interference electromagnetic wave of amplitude size; the operating condition wave frequency section that the interference electromagnetic wave and electricity consumption module that the first unit generates generate at work is identical; therefore; it is radiated in environment after two kinds of electromagnetic wave superpositions, attacker is difficult to distinguish interference electromagnetic wave and operating condition electromagnetic wave, protects information security.
Description
Technical field
The present invention relates to field of information security technology more particularly to a kind of interference signal generators, shell and shell.
Background technique
At work, the electromagnetic leakage of information, leakage occur computer system for the display screen of system, hard disk, keyboard etc.
Mode is that route conducted emission and space radiate, and leakage intensity depends on the circuit design of system, structure design and working characteristics.
It is both domestic and external studies have shown that can by receiving device (receiver, frequency spectrograph etc.) capture computer electromagnetism let out
Leakage signal, and by later data processing method, restore the operation information of computer.Computer Electromagnetic Radiation has divulged a secret problem
Through causing the great attention of every country, to prevent these information from propagating in the sky, it is necessary to take protection and inhibit electromagnetism spoke
Penetrate the know-how measure divulged a secret, the technical measures of this respect have: perturbation technique (jammer), shield technology (screened room) and
Tempest technology (Low emissivity machine).But it is big to promote difficulty for current jammer technical pattern too complex, higher cost.
Summary of the invention
For solve in the prior art jammer or device technology structure is complicated the technical issues of, the embodiment of the present invention provide
A kind of interference signal generator, shell and shell, technical pattern is simple and cost is relatively low.
The embodiment of the present invention provides a kind of interference signal generator, for protecting electricity consumption module, wherein sends out including random number
Raw unit and the first unit being connect with the random number generation unit；The frequency for the electromagnetic wave that the first unit generates with
The frequency for the electromagnetic wave that the electricity consumption module generates is identical, the electromagnetism that the random number generation unit generates the first unit
Wave carries out amplitude modulation.
It further preferably, further include the power supply unit powered respectively to the electricity consumption module and first unit, the power supply
Unit output inputs the first unit after random number generation unit amplitude modulation.
Further preferably, the first unit includes conductive gauze or several conductor wires.
Further preferred: the conductor wire is irregular conductor wire；
The irregular conductor wire include sectional area length direction be the conductor wire of variation or surface have it is raised or sunken
Conductor wire or at least there are two bending or bending be different conductor wire or at least there are two bending or bending
It is not in the conductor wire of a plane.
It is further preferred:
The variation is random；
Alternatively, the raised or sunken shape or arrangement are random；
Alternatively, the shape or arrangement of the bending or bending are random.
Further preferably, the conductive gauze includes the irregular conductor wire.
Further preferably, the first unit includes sheet metal or gold with prominent structure and/or sagging structure
Belong to shell.
Further preferably, the shape or arrangement of the prominent structure or sagging structure are random.
Further preferably, said supply unit includes Clock generation module and power module, the Clock generation module pair
The electric current or voltage that power module generates are modulated.
The embodiment of the present invention also provides a kind of shell, including shell ontology, wherein further includes that above-mentioned interference signal occurs
Device, the first unit are fixed on the shell ontology.
The embodiment of the present invention also provides a kind of shell, including first shell, the second shell on the outside of the first shell
Body, for detecting the first attack detecting unit that whether first shell is attacked and for whether detecting the second shell
The the second attack detecting unit attacked；The detection sensitivity of the second attack detecting unit is greater than the first attack detecting list
Member；The first shell and/or second shell include above-mentioned shell.
The electromagnetic wave that the interference signal generator of the embodiment of the present invention uses random number generation unit to generate first unit
It is modulated, it is made to generate the random interference electromagnetic wave of amplitude size, the interference electromagnetic wave generated due to the first unit and use
The operating condition wave frequency section that electric module generates at work be it is identical, therefore, be radiated environment after the superposition of two kinds of electromagnetic waves
In, attacker is difficult to distinguish interference electromagnetic wave and operating condition electromagnetic wave, the information security of electricity consumption module is protected, simultaneously as with
Machine number generating unit can be with only one, and structure is simple, reduces costs.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without any creative labor, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the interference signal generator of the embodiment of the present invention.
Fig. 2 is one schematic diagram of conductor wire of the embodiment of the present invention.
Fig. 3 is two schematic diagram of conductor wire of the embodiment of the present invention.
Fig. 4 is three schematic diagram of conductor wire of the embodiment of the present invention.
Fig. 5 is the conductive gauze schematic diagram of the embodiment of the present invention.
Fig. 6 is the metal-back structural schematic diagram of the embodiment of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description.It is understood that specific embodiment described herein is only used for explaining the application, rather than to the limit of the application
It is fixed.Based on the embodiment in the application, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall in the protection scope of this application.
Term " first ", " second ", " third " in the application are used for description purposes only, and should not be understood as instruction or dark
Show relative importance or implicitly indicates the quantity of indicated technical characteristic.It follows that define " first ", " second ",
The feature of " third " can explicitly or implicitly include at least one of the features.For example, in the model for not departing from the application
In the case where enclosing, first kind plane can be known as to the second class plane, and similarly, the second class plane can be known as the first kind and put down
Face.First kind plane and the second class plane both plane, but it is not same class plane.It is " more in the description of the present application
It is a " it is meant that at least two, such as two, three etc., unless otherwise specifically defined.In addition, term " includes " and
" having " and their any deformations, it is intended that cover and non-exclusive include.Such as contain a series of steps or units
Process, method, system, product or equipment are not limited to listed step or unit, but optionally further comprising do not arrange
Out the step of or unit, or optionally further comprising for the intrinsic other steps of these process, methods, product or equipment or list
Member.
It is referenced herein " embodiment " it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
It is contained at least one embodiment of the application.Each position in the description occur the phrase might not each mean it is identical
Embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art explicitly and
Implicitly understand, embodiment described herein can be combined with other embodiments.
Core of the invention thought is to carry out width to the interference electromagnetic wave that first unit generates using random number generation unit
Degree modulation carries out amplitude modulation to the output of power supply unit using random number generation unit, through amplitude specific to some embodiments
Modulated output enters first unit, so that the first unit is generated the random interference electromagnetic wave of amplitude size, due to using same
(output of power supply unit divides two-way to the power supply of one power supply unit, enters first unit after ovennodulation all the way, and another way is directly entered
Electricity consumption module), the operating condition wave frequency section that the interference electromagnetic wave and electricity consumption module which generates generate at work
Be it is identical, therefore, be radiated in environment after the superposition of two kinds of electromagnetic waves, attacker is difficult to distinguish interference electromagnetic wave and operating condition electromagnetism
Wave protects the information security of electricity consumption module, simultaneously as random number generation unit can be with only one, structure is simple, reduces
Cost.Currently, many secure data equipment all have encryption function, in order to realize encryption function, it is internal be generally integrated with
Machine number generating unit, therefore, the present invention may be implemented low cost and carry out safety upgrade to secure data equipment, prevent secure data
The operating condition electromagenetic wave radiation bring leakage of information that equipment generates at work, specifically, by the shell of existing secure data equipment
Changing the shell with the first unit into or being arranged one again outside existing secure data device housings has first list
The shell of member, upgrading is simple and convenient, and the secure data equipment safety performance after upgrading greatly promotes.
As one embodiment provided by the invention, the interference signal generator include random number generation unit and with this
The first unit of random number generation unit connection；The electricity that the frequency and the electricity consumption module for the electromagnetic wave that the first unit generates generate
The frequency of magnetic wave is identical, which carries out amplitude modulation to the electromagnetic wave that the first unit generates.Therefore, this
It is radiated in environment after two kinds of electromagnetic waves superposition that Unit one and electricity consumption module generate, attacker is difficult area, protects electricity consumption mould
The information security of block.
Fig. 1 is the structural schematic diagram of the interference signal generator of the embodiment of the present invention.Please refer to Fig. 1, the embodiment of the present invention
A kind of interference signal generator is provided.The interference signal generator, for protecting electricity consumption module 120, including power supply unit 110,
Random number generation unit 140 and first unit 130；140 width of random number generation unit is passed through in the output of the power supply unit 110
The first unit 130 is inputted after degree modulation, which also connect with the electricity consumption module 120；The first unit 130 with
The electromagnetic wave of the electricity consumption module 120 generation same frequency section.The interference electromagnetic wave and the electricity consumption module that the first unit 130 generates
The frequency band of the 120 operating condition electromagnetic waves generated be it is same, after the superposition of the interference electromagnetic wave and operating condition electromagnetic wave of same frequency segment,
Along with interference electromagnetic wave is modulated by random number, interference electromagnetic wave is unpredictable, therefore, considerably increases attacker's
Attack difficulty.Simultaneously as the random number generation unit of the embodiment of the present invention can use one, greatly reduce that structure is complicated
Degree, reduces costs.
The electricity consumption module 120 of the embodiment of the present invention, which can be processor, encrypting module, deciphering module, chip etc., to be had
Device, module or the unit of processing and calculation function.Certainly, which can also be some other circuit, including
Analog circuit or digital circuit.
The random number generation unit 140 of the embodiment of the present invention can be true random number generating unit, be also possible to pseudorandom
Number generating unit.The pseudo random number generating unit includes feedback shift register, and the feedback shift register is by multiple d type flip flops
It is composed in series.The true random number generating unit can be a true random number generation circuit, which includes:
One high frequency oscillator, for generating high frequency clock signal；One low-frequency oscillator generates noise source based on Resistance Thermal Noise；One T touching
Device is sent out, input end of clock CLK is connected with the output end of the low-frequency oscillator, the noise source which is generated
As clock signal；One multistage two-divider, input terminal are connected with the output end of the high frequency oscillator, output end and this
The end data input pin T of T trigger is connected；The low-frequency oscillator is to the high frequency clock signal by multistage two-divider frequency dividing
It is sampled, which exports true random number.The true random number generation circuit has good stochastic behaviour,
It realizes simple.Certainly, which can also be other true random number generation circuit, device or elements.This
Inventive embodiments preferably random number generation unit 140 is true random number generating unit, increases the difficulty of attack.Random number hair
Raw unit 140 exports carry out amplitude to power supply unit 110 and is modulated to the prior art, and this specification just repeats no more.
The power supply unit 110 is used for providing electric current or voltage for electricity consumption module 120 and first unit 130, certainly,
The power supply unit 110 is also provided to the use of random number generation unit 140.The power supply unit 110 includes Clock generation module
111 and power module 112, the electric current or voltage which generates the power module 112 are modulated,
It is modulated for example, by using PWM modulation or using PFM, which is the prior art, is repeated no more.The power module 112 warp
Required electric current output is generated after crossing the Clock generation module 111 modulation.Certainly, which can be direct output
The power supply of required electric current.The output of the power supply unit 110 is divided into two-way, uses all the way for electricity consumption module 120, and another way supplies first
Unit uses.
The effect of the first unit 130 is generation interference electromagnetic wave, and is to generate and operating condition electromagnetic wave same frequency segment
Interference electromagnetic wave, therefore, which is any device or structure that can produce required frequency band.For structure
Simply, cost is reduced, realization is facilitated, preferably first unit 130 of the embodiment of the present invention is several conductor wires either conductor wire
Net or sheet metal or metal-back etc..The material of the conductor wire can be metal, and the arrangement of conductor wire can be parallel
Cloth, is also possible to staggered, can also be other arrangements.The input terminal and output end of several conductor wires or conductive gauze
It is the combination between an input terminal, multiple input terminals, an output end and multiple output ends.If the embodiment of the present invention preferably should
Dry conductor wire or conductor wire net have an input terminal and an output end, realize more simple.Therefore, several conductor wires
With regard to needing to join end to end, it is cascaded.The sheet metal or metal-back have an input terminal and an output end.In order to increase
Add attack difficulty, the preferably conductor wire is irregular conductor wire, the amplitude for the interference electromagnetic wave which generates and
Main propagation direction is uncertain, so will increase degree of disturbance；The sheet metal or metal-back be have prominent structure or
The sheet metal or metal-back for structure of sinking, principle is identical as conductor wire, therefore, also will increase degree of disturbance.
Fig. 2 is one schematic diagram of conductor wire of the embodiment of the present invention.Fig. 3 is two schematic diagram of conductor wire of the embodiment of the present invention.
Fig. 4 is three schematic diagram of conductor wire of the embodiment of the present invention.Fig. 5 is the conductive gauze schematic diagram of the embodiment of the present invention.Fig. 6 is this hair
The metal-back structural schematic diagram of bright embodiment.
Specifically, referring to figure 2. to Fig. 5, the present embodiment preferably irregular conductor wire 131 includes sectional area in length direction
It is the conductor wire of variation, as shown in figure 4, the sectional area is from big to small again from small to large；Alternatively, the irregular conductor wire 131 is
Surface has raised or sunken conductor wire, as shown in figure 4, the conductor wire 131 includes several recess, such as located above recessed
The recess 1316 for falling into 1315 and being located below；Alternatively, it is not that the irregular conductor wire 131, which is at least there are two bending or bending,
The same conductor wire or at least there are two bending or bending be not in the conductor wire of a plane, as shown in Figures 2 and 3,
In the same plane, such as the bending 1311 is different with being bent 1312 for bending in Fig. 2 or bending；In Fig. 3 extremely
Rare one is bent or bends not in the same plane, which is different and not same with bending 1314
In plane.The preferably irregular conductive gauze of the conductor wire net, irregular conduction gauze can be the in irregular shape of mesh or
Person's shape of a mesh has different, and the conductor wire for being also possible to constitute conductive gauze is irregular, as shown in figure 5, this is not advised
Then conductive gauze 132 includes the mesh of irregular conductor wire and irregular shape, for example, mesh 1323 and mesh 1324 it is different,
And mesh 1324 be it is irregular, have an input terminal 1321 and an output end 1322.Conductor wire network optimization choosing is using above
Irregular conductor wire is constituted.Unpredictability in order to further increase, increases the difficulty of attack, and preferably this is not or not the embodiment of the present invention
The sectional area of regular conductor wire 131 is random in the variation of length direction；Alternatively, the protrusion of the irregular conductor wire 131 or
The shape of recess or arrangement are random；Alternatively, the shape or arrangement of bending or the bending of the irregular conductor wire 131
It is random.Refer at random and variation, shape or arrangement are not required, without limitation, as long as may be implemented.It leads
The material of electric wire or conductive gauze can be metal, can also be that semiconductor or other conductive materials, the present invention are implemented
Example preferred semiconductor material, one facilitates production, and two more have the electromagnetic wave that is generated due to the characteristic of semiconductor can not be pre-
The property surveyed, increases interference strength.
Fig. 6 is please referred to, the metal-back 133 of the embodiment of the present invention has several prominent structures 1331 and/or sunk structure
1332, the protrusion structure 1331 and sunk structure 1332 can be irregular, preferably the protrusion structure 1331 or the knot that sink
The shape of structure 1332 or arrangement are random.The protrusion structure and sunk structure of the sheet metal are identical as the metal-back 133, no
It is repeating.
The embodiment of the present invention also provides a kind of shell, which can produce interference electromagnetic wave, for protecting electricity consumption module.
The shell includes shell ontology and above-mentioned interference signal generator, which is fixed on the shell ontology.Such as this several is led
Line can be distributed on the shell ontology, can be end to end cascade, be also possible to form in parallel, be arranged in the shell
The surface of ontology, the preferably conductor wire cover the shell body surface with interval.The conduction gauze can also be located at the shell ontology
Surface, such as outer surface or inner surface may be located on the centre of the shell ontology, i.e., the shell ontology intermediate arrangement has conduction
Gauze can also increase the intensity of the shell ontology if the conduction gauze is metal mesh.The metal-back can also be located at the shell sheet
The surface or centre of body.The power supply unit and random number generation unit can be set on the shell ontology, also can be set at this
In the space that shell ontology is formed, such as with the setting of electricity consumption module on same local (circuit board).
The requirement of secure data equipment safety with higher, it is preferred to use above-mentioned shell is as shell.In order into one
Step enhancing safety, provides dual or multi-ensuring, the shell of preferred security data equipment of the embodiment of the present invention includes at least
First shell and second shell, second shell outside are provided with first shell, which accommodates the secure data equipment
The components such as internal circuit board, controller and energy-storage units.The first shell and/or the preferably above-mentioned shell of second shell are (i.e.
Including first unit, random number generation unit and power supply unit).The random number generation unit and power supply unit of the first shell are set
It sets on the board, the first unit of the first shell is fixed on the ontology of the first shell.The first shell it is random
Number generating units and power supply unit can with the random number generation unit and power supply unit of second shell share, it can reduce with
The use of machine number generating unit and power supply unit, reduces cost.In the case where optimal, only one in the secure data equipment is supplied
Electric unit (i.e. power module) and a random number generation unit.The first shell further includes being located in the first shell for examining
The the first attack detecting the unit whether first shell is attacked is surveyed, which further includes being located in the second shell to be used for
Detect the second attack detecting the unit whether second shell is attacked.The first, second attack detecting unit respectively be located at
First unit connection on first and second shell, when first unit is by attacking, the first and second attack detecting unit can be known.
The specific first unit is several conductor wires, such as several metal wires, these metal wires are arranged in the first shell and second shell
The surface of body, for generating interference electromagnetic wave.The random number generation unit and power supply unit distinguish only one (i.e. first shell
Shared with second shell), it is located on circuit board.The detection sensitivity of the second attack detecting unit is greater than the first attack inspection
Unit is surveyed, is preferably all connect with the controller, therefore, which could be aware that attack.Detection described in the present embodiment is sensitive
Degree refers to that the first attack detecting unit or the perception of the second attack detecting unit are broken into and (are either attacked or be destroyed) energy
The power of power.In the present embodiment, when being attacked, which detects attack, generates alarm signal, can hinder
The only attack of attacker.Since the detection sensitivity angle of the first attack detecting unit is lower, clever attacker is destroying the
When not detected by the first attack detecting unit when one shell, due to the presence of second shell, attacker cannot still obtain institute
It needs, needs to continue to implement attack.For attacker when attacking second shell, which detects attack,
Alarm signal is generated, the attack of attacker can be prevented.Since the detection sensitivity of the second attack detecting unit is higher, mention significantly
High attack detecting success rate, ensure that safety.Multiple protective shell, detection sensitivity high level matches with low level, reduces maloperation
While ensure that high attack detecting success rate, improve the safety of the secure data processing device of the embodiment of the present invention on the whole
Property.In order to improve safety, distance of the present embodiment preferably between the first shell and second shell is less than 5mm, such attacker
Second shell can be inevitably destroyed when breaking through first shell, play safer protection.One as the present embodiment
Kind implementation, the first attack detecting unit and/or the second attack detecting unit are respectively first sensor and the second sensing
Device, the first sensor are connect with the controller respectively with second sensor.The first sensor and second sensor can not
It connect with first unit and is directly connect with power supply module.The first sensor can be photoelectric sensor, pressure sensor, temperature
Sensor, baroceptor, vibrating sensor or strain gauge.The second sensor can also be with photoelectric sensor, pressure
Sensor, temperature sensor, baroceptor, vibrating sensor or strain gauge.
Although embodiment is illustrated by the attached drawing limited, the those skilled in the art of the art can be in institute
It states and carries out a variety of amendments and deformation on the basis of recording.For example, the technology of explanation can be according to the sequence for the method for being different from explanation
Execute, and/or explanation system, structure, device, circuit etc. constituent element can according to the method for being different from explanation other
Combination of shape and state or combination can reach result appropriate being substituted or being replaced by other constituent elements or equivalent.Therefore,
Other constituted modes, other embodiments and what is be equal with Patent request range belong to Patent request range.
Claims (11)
1. a kind of interference signal generator, for protecting electricity consumption module, which is characterized in that including random number generation unit and with
The first unit of the random number generation unit connection；The frequency and the electricity consumption module for the electromagnetic wave that the first unit generates
The frequency of the electromagnetic wave of generation is identical, and the random number generation unit carries out amplitude tune to the electromagnetic wave that the first unit generates
System.
2. interference signal generator according to claim 1, which is characterized in that further include respectively to the electricity consumption module and
The power supply unit of first unit power supply, said supply unit output input institute after random number generation unit amplitude modulation
State first unit.
3. interference signal generator according to claim 1 or 2, which is characterized in that the first unit includes conduction
Gauze or several conductor wires.
4. interference signal generator according to claim 3, it is characterised in that: the conductor wire is irregular conductor wire；
The irregular conductor wire include sectional area length direction be the conductor wire of variation or surface have it is raised or sunken
Conductor wire or at least there are two bending or bending be different conductor wire or at least there are two bending or bending
It is not in the conductor wire of a plane.
5. interference signal generator according to claim 4, it is characterised in that:
The variation is random；
Alternatively, the raised or sunken shape or arrangement are random；
Alternatively, the shape or arrangement of the bending or bending are random.
6. interference signal generator according to claim 4, which is characterized in that the conduction gauze includes described irregular
Conductor wire.
7. interference signal generator according to claim 1, which is characterized in that the first unit includes having prominent knot
The sheet metal or metal-back of structure and/or sagging structure.
8. interference signal generator according to claim 7, which is characterized in that the prominent structure or sagging structure
Shape and/or arrangement are random.
9. interference signal generator according to claim 2, which is characterized in that said supply unit includes that mould occurs for clock
Block and power module, the electric current or voltage that the Clock generation module generates power module are modulated.
10. a kind of shell, including shell ontology, which is characterized in that further include the described in any item interference signals of claim 1 to 9
Generator, the first unit are fixed on the shell ontology.
11. a kind of shell, which is characterized in that including first shell, the second shell on the inside of the first shell, for examining
It surveys the first shell the first attack detecting unit whether attacked and whether is attacked for detecting the second shell
Second attack detecting unit；The detection sensitivity of the second attack detecting unit is greater than the first attack detecting unit；Described
One shell and/or second shell include shell described in any one of claim 10.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114760003A (en) * | 2022-06-14 | 2022-07-15 | 北京密码云芯科技有限公司 | Encryption protection device for electromagnetic perception attack and use method |
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| CN109150367A (en) * | 2018-06-21 | 2019-01-04 | 中国科学院信息工程研究所 | The wireless signal leakage guard method of important place and device |
| CN109218564A (en) * | 2018-11-13 | 2019-01-15 | 深圳市金城保密技术有限公司 | Generation method, device, storage medium and the video interferometer of video jamming signal |
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| CN114760003A (en) * | 2022-06-14 | 2022-07-15 | 北京密码云芯科技有限公司 | Encryption protection device for electromagnetic perception attack and use method |
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