CN113194701A - Electromagnetic leakage attack prevention device - Google Patents
Electromagnetic leakage attack prevention device Download PDFInfo
- Publication number
- CN113194701A CN113194701A CN202110366540.1A CN202110366540A CN113194701A CN 113194701 A CN113194701 A CN 113194701A CN 202110366540 A CN202110366540 A CN 202110366540A CN 113194701 A CN113194701 A CN 113194701A
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- electromagnetic
- shield cover
- shielding
- circuit board
- coating
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/0045—Casings being rigid plastic containers having a coating of shielding material
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses an electromagnetic leakage attack prevention device, which aims to overcome the problem of poor interference resistance in the prior art and comprises a shielding cover made of hot-dip galvanized steel, wherein the hot-dip galvanized steel is also called SGCC (Standard general reference conductor) and is high-quality anti-prying heavy industrial steel, an opening is formed in one end of the shielding cover, a circuit board covering the opening of the shielding cover is fixedly arranged on the shielding cover, a control chip is connected onto the circuit board and arranged in the shielding cover, an electromagnetic resistance coating is arranged on the inner surface of the shielding cover, and the electromagnetic resistance coating is made of an EMI shielding material.
Description
Technical Field
The invention belongs to electronic products, and particularly relates to an electromagnetic leakage attack prevention device.
Background
With the rapid development of smart devices and the internet, communication devices are gradually popularized, and the communication devices realize remote communication through radio waves, but the radio waves are easily interfered by electromagnetic waves emitted by other electrical appliances, power supplies, the atmosphere and the like, and are also easily attacked by electromagnetic waves for a hacker to steal confidential data, and the hardware security is becoming an important research object in electronic products.
However, the prior art is not perfect, and with the portable requirement of people for the equipment, the equipment tends to adopt the casing made of metal, and the shielding case made of metal has a simpler structure and a poor electromagnetic shielding effect, and is easy to be attacked by electromagnetic interference, so that the equipment has the problems of reduced communication quality and leakage of confidential data.
Summary of the invention
In order to overcome the defects and problems in the prior art, the invention provides an electromagnetic leakage attack prevention device.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an anti-electromagnetic leakage attack device, includes the shield cover that adopts hot dip galvanized steel to make, and shield cover one end has the opening, and the fixed circuit board of lid establishing on the shield cover opening that is provided with on the shield cover is connected with control chip on the circuit board, and control chip sets up in the shield cover, and its characterized in that, the internal surface of shield cover is provided with anti-electromagnetic coating, and anti-electromagnetic coating adopts EMI shielding material to make.
Preferably, the electromagnetic resistant coating contains 60-70% of conductive epoxy resin, 8-12% of silver-coated copper powder and 0.3-0.6% of curing agent by mass.
Preferably, the inner surface of the shielding cover is further provided with a shielding net which is formed by weaving steel wires, the anti-electromagnetic coating covers the shielding net, and the anti-electromagnetic coating fastens the shielding net on the inner surface of the shielding cover.
Preferably, the steel wire has a diameter of 0.3 to 1.1 mm.
Preferably, the circuit board is provided with an inductance coil, the inductance coil is used for acquiring electromagnetic field signals and converting the electromagnetic field signals into current signals, the inductance coil is electrically connected with a detection module, the detection module is used for comparing the current signals acquired by the inductance coil with a preset threshold value, the detection module is electrically connected to the control chip, and when the current signals acquired by the inductance coil are higher than the preset threshold value, the detection module sends reset signals to the control chip.
Preferably, the whole structure of the inductance coil is circular.
Preferably, the circuit board is connected with an electromagnetic interference signal generator, the electromagnetic interference signal generator is arranged in the shielding case, the electromagnetic interference signal generator is electrically connected to the control chip, the electromagnetic interference signal generator is connected with an antenna module, and the antenna module is arranged outside the shielding case.
Preferably, a plug is formed on the shielding cover, a slot is formed on the circuit board, and the plug is inserted into the slot.
Compared with the prior art, the invention has the outstanding and beneficial technical effects that:
(1) in this anti-electromagnetic leakage attack device, control chip sets up in the shield cover, and anti-electromagnetic coating sets up on the internal surface of shield cover, and shield cover and anti-electromagnetic coating play double-shielded effect, weaken external electromagnetic pulse and propagate to the shield cover in, anti-electromagnetic coating plays electromagnetic shield's effect, therefore this anti-electromagnetic leakage attack device has that electromagnetic pulse protecting effect is good, reliable operation and security are strong advantage.
(2) In the electromagnetic leakage attack preventing device, the conductive epoxy resin has the characteristics of good conductivity, strong toughness, strong viscosity and heat resistance, the viscosity, the toughness, the heat resistance and the conductivity of the electromagnetic-resistant coating are improved, the electromagnetic-resistant coating is convenient to adhere to the surface of the shielding case, the problem that the electromagnetic-resistant coating is cracked or even falls is also avoided, the silver-coated copper powder is characterized in that the surface of the copper powder is coated with the silver coating, compared with single metal powder, the silver-coated copper powder has the characteristics of strong oxidation resistance and good conductivity, the conductivity of the electromagnetic-resistant coating is improved, and the curing agent has the characteristic of slow reaction at normal temperature, so that the electromagnetic-resistant coating can be stored for a long time.
(3) In this anti-electromagnetic leakage attack device, compound anti-electromagnetic coating and shielding net on the shield cover, the shield cover adopts hot dip galvanized steel to make, the shielding net adopts the steel wire to weave to form, anti-electromagnetic coating adheres on the internal surface of shield cover, anti-electromagnetic coating still fastens the shielding net on the internal surface of shield cover, structural design is reasonable, the processing preparation of being convenient for, and the shield cover that compound has anti-electromagnetic coating and shielding net has mechanical strength height, anti-electromagnetic energy is strong and the advantage that the wholeness is good.
(4) In this anti-electromagnetic leakage attack device, inductance coils is used for gathering the electromagnetic field signal on every side to convert the electromagnetic field signal who gathers into current signal and send to detecting module, detecting module is used for comparing current signal and predetermined threshold value, if exceed the threshold value, detecting module sends reset signal to control chip, when control chip receives reset signal, control chip directly resets, has played the effect of circuit protection, therefore this anti-electromagnetic leakage attack device has multiple protection's advantage to electromagnetic impact.
(5) In the electromagnetic leakage attack prevention device, the electromagnetic interference signal generator is used for outputting electromagnetic interference signals to the antenna module, the antenna module is used for diffusing the electromagnetic interference signals to the periphery of the electromagnetic leakage attack prevention device, the electromagnetic interference signals play a role in avoiding other people from stealing radio waves of the electromagnetic leakage attack prevention device and avoiding the problem that secret information is stolen, and therefore the electromagnetic leakage attack prevention device has the advantages of being anti-theft and high in safety factor.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is one of the schematic diagrams of the explosive structure created by the present invention;
FIG. 3 is a second schematic diagram of the explosion structure created by the present invention;
FIG. 4 is a schematic cross-sectional structure diagram of the shielding case, the anti-electromagnetic coating and the shielding net of the invention;
in the figure: 1-shielding case, 2-circuit board, 3-control chip, 4-anti-electromagnetic coating, 5-shielding net, 6-inductance coil, 7-detection module, 8-electromagnetic interference signal generator, 9-antenna module, 10-plug, 11-slot.
Detailed Description
In order to facilitate the understanding of those skilled in the art, the invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 4, an electromagnetic leakage attack prevention device comprises a hollow shielding case 1, wherein an opening is formed in one end of the shielding case 1, a circuit board 2 is fixedly arranged on the shielding case 1, the circuit board 2 is arranged on the opening of the shielding case 1 in a covering manner, a control chip 3 is electrically connected to the circuit board 2, the control chip 3 is arranged in the shielding case 1, the circuit board 2 seals the shielding case 1, and the circuit board 2 plays a role in sealing protection for the control chip 3 in the shielding case 1.
The shielding case 1 is made of hot-dip galvanized steel, the hot-dip galvanized steel is also called SGCC and is heavy industrial steel with anti-prying property and high quality, and the shielding case 1 made of the hot-dip galvanized steel has the advantages of light weight and good electromagnetic shielding effect. The internal surface of shield cover 1 is provided with anti-electromagnetic coating 4, anti-electromagnetic coating 4 adopts EMI shielding material to make, in this anti-electromagnetic leakage attack device, control chip 3 sets up in shield cover 1, anti-electromagnetic coating 4 sets up on the internal surface of shield cover 1, shield cover 1 and anti-electromagnetic coating 4 play double-shielded effect, weaken in external electromagnetic pulse propagates to shield cover 1, anti-electromagnetic coating 4 plays electromagnetic shield's effect, consequently this anti-electromagnetic leakage attack device has that electromagnetic pulse protective effect is good, the advantage that reliable operation and security are strong.
The anti-electromagnetic coating 4 comprises, by mass, 60-70% of conductive epoxy resin, 8-12% of silver-coated copper powder and 0.3-0.6% of curing agent, wherein the conductive epoxy resin has the characteristics of good conductivity, strong toughness, strong viscosity and heat resistance, the viscosity, the toughness, the heat resistance and the conductivity of the anti-electromagnetic coating 4 are improved, the anti-electromagnetic coating 4 can be conveniently adhered to the surface of the shielding case 1, and the problem that the anti-electromagnetic coating 4 is cracked and even falls is avoided.
The internal surface of shield cover 1 still is provided with shielding net 5, shielding net 5 adopts the steel wire to weave and forms, the diameter of steel wire is 0.3-1.1mm, the steel wire also has good electric conductivity, magnetic conductivity and pliability, shielding net 5 is equivalent to the equipotential body, the electromagnetic shield effect of this anti-electromagnetic leakage attack device has further been promoted, the cladding of anti-electromagnetic coating 4 is on shielding net 5, anti-electromagnetic coating 4 fastens shielding net 5 on the internal surface of shield cover 1, the installation of shielding net 5 on shield cover 1 has been made things convenient for.
In this anti-electromagnetic leakage attack device, compound anti-electromagnetic coating 4 and shielding net 5 on shield cover 1, shield cover 1 adopts hot-dip galvanized steel to make, shielding net 5 adopts the steel wire to weave and forms, anti-electromagnetic coating 4 adhesion is on shield cover 1's internal surface, anti-electromagnetic coating 4 still fastens shield net 5 on shield cover 1's internal surface, structural design is reasonable, the processing preparation of being convenient for, and compound shield cover 1 that has anti-electromagnetic coating 4 and shielding net 5 has mechanical strength height, anti-electromagnetic ability is strong and the advantage that the wholeness is good.
An inductance coil 6 is fixedly arranged on the circuit board 2, a detection module 7 is electrically connected to the inductance coil 6, the inductance coil 6 and the detection module 7 are respectively arranged in the shielding case 1, and the detection module 7 are electrically connected to the control chip 3.
In this anti-electromagnetic leakage attack device, inductance coils 6 is used for gathering the electromagnetic field signal on every side, and convert the electromagnetic field signal who gathers into current signal and send to detecting module 7, detecting module 7 is used for comparing current signal and preset threshold value, if exceed the threshold value, detecting module 7 sends reset signal to control chip 3, when control chip 3 received reset signal, control chip 3 directly resets, the effect of circuit protection has been played, consequently this anti-electromagnetic leakage attack device has the advantage of multiple protection to electromagnetic impact.
The whole structure of the inductance coil 6 is circular, and the circular inductance coil 6 can receive electromagnetic fields electrified in any direction around, so that the effect of omnibearing protection is achieved.
The electromagnetic interference signal generator 8 is fixedly arranged on the circuit board 2, the electromagnetic interference signal generator 8 is electrically connected to the control chip 3, the electromagnetic interference signal generator 8 is electrically connected with an antenna module 9, the electromagnetic interference signal generator 8 is arranged in the shielding case 1, the antenna module 9 is fixedly arranged on the circuit board 2, and the antenna module 9 is arranged outside the shielding case 1.
In the electromagnetic leakage attack preventing device, the electromagnetic interference signal generator 8 is used for outputting electromagnetic interference signals to the antenna module 9, the antenna module 9 is used for diffusing the electromagnetic interference signals to the periphery of the electromagnetic leakage attack preventing device, the electromagnetic interference signals play a role in preventing other people from stealing radio waves of the electromagnetic leakage attack preventing device and avoiding the problem that confidential information is stolen, and therefore the electromagnetic leakage attack preventing device has the advantages of being anti-theft and high in safety factor.
Be formed with plug 10 on shield cover 1, plug 10 sets up in the open-ended outside of shield cover 1, has seted up slot 11 on circuit board 2, and plug 10 inserts and establishes in slot 11 to realize that circuit board 2 is fixed to be set up on shield cover 1, the bare-handed dismouting that can of user, further made things convenient for the assembly.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention shall be covered within the protection scope of the invention.
Claims (8)
1. The utility model provides an anti-electromagnetic leakage attack device, a serial communication port, including shield cover (1) that adopts hot dip galvanizing steel to make, shield cover (1) one end has the opening, shield cover (1) is gone up fixed being provided with to cover circuit board (2) of establishing on shield cover (1) opening, be connected with control chip (3) on circuit board (2), control chip (3) set up in shield cover (1), the internal surface of shield cover (1) is provided with anti-electromagnetic coating (4), anti-electromagnetic coating (4) adopt EMI shielding material to make.
2. An electromagnetic leakage attack preventing device according to claim 1, characterised in that the electromagnetic leakage attack preventing coating (4) contains 60-70% by mass of conductive epoxy resin, 8-12% by mass of silver-coated copper powder and 0.3-0.6% by mass of curing agent.
3. An electromagnetic leakage attack preventing device according to claim 1 or 2, characterized in that the inner surface of the shielding case (1) is further provided with a shielding net (5), the shielding net (5) is woven by steel wires, the electromagnetic resistant coating (4) is coated on the shielding net (5), and the electromagnetic resistant coating (4) fastens the shielding net (5) on the inner surface of the shielding case (1).
4. A device for preventing electromagnetic leakage according to claim 3, wherein said steel wire has a diameter of 0.3-1.1 mm.
5. The electromagnetic leakage attack preventing device according to claim 1, wherein an inductance coil (6) is arranged on the circuit board (2), the inductance coil (6) is used for collecting electromagnetic field signals and converting the electromagnetic field signals into current signals, the inductance coil (6) is electrically connected with a detection module (7), the detection module (7) is used for comparing the current signals collected by the inductance coil (6) with a preset threshold value, the detection module (7) is electrically connected to the control chip (3), and when the current signals collected by the inductance coil (6) are higher than the preset threshold value, the detection module (7) sends a reset signal to the control chip (3).
6. An electromagnetic leakage attack preventing device according to claim 5, characterized in that the whole structure of the inductance coil (6) is circular.
7. An electromagnetic leakage attack preventing device according to claim 1, characterized in that the circuit board (2) is connected with an electromagnetic interference signal generator (8), the electromagnetic interference signal generator (8) is arranged in the shielding case (1), the electromagnetic interference signal generator (8) is electrically connected to the control chip (3), the electromagnetic interference signal generator (8) is connected with an antenna module (9), and the antenna module (9) is arranged outside the shielding case (1).
8. The electromagnetic leakage attack preventing device according to claim 1, wherein the shielding case (1) is formed with a plug (10), the circuit board (2) is formed with a slot (11), and the plug (10) is inserted into the slot (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110366540.1A CN113194701A (en) | 2021-04-06 | 2021-04-06 | Electromagnetic leakage attack prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110366540.1A CN113194701A (en) | 2021-04-06 | 2021-04-06 | Electromagnetic leakage attack prevention device |
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| Publication Number | Publication Date |
|---|---|
| CN113194701A true CN113194701A (en) | 2021-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110366540.1A Pending CN113194701A (en) | 2021-04-06 | 2021-04-06 | Electromagnetic leakage attack prevention device |
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| CN (1) | CN113194701A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117794213A (en) * | 2023-12-29 | 2024-03-29 | 南通诚业德精密组件有限公司 | Electromagnetic shielding device for electronic equipment |
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| US20200043868A1 (en) * | 2018-07-31 | 2020-02-06 | Nvidia Corporation | Protecting chips from electromagnetic pulse attacks using an antenna |
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2021
- 2021-04-06 CN CN202110366540.1A patent/CN113194701A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1998274A (en) * | 2003-06-30 | 2007-07-11 | 诺基亚公司 | Electromagnetic interference shield and method of making the same |
| WO2005059999A1 (en) * | 2003-12-10 | 2005-06-30 | Innova Card | Integrated circuit protected by an active shielding |
| CN204538375U (en) * | 2015-04-20 | 2015-08-05 | 淮南师范学院 | A kind of shielding construction for connector supply socket |
| CN105323031A (en) * | 2015-11-12 | 2016-02-10 | 浙江大学 | Anti-eavesdropping device based on electromagnetic interference attack |
| CN105555115A (en) * | 2016-02-17 | 2016-05-04 | 莫镇威 | Electromagnetic shielding method for communication equipment and communication equipment with electromagnetic shielding function |
| CN105694470A (en) * | 2016-02-17 | 2016-06-22 | 莫镇威 | Electromagnetic shielding material preparation method, electromagnetic shielding material product and electromagnetic shielding key terminal |
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| CN109130383A (en) * | 2018-07-25 | 2019-01-04 | 深圳市弘海电子材料技术有限公司 | A kind of bilayer electromagnetic shielding film and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117794213A (en) * | 2023-12-29 | 2024-03-29 | 南通诚业德精密组件有限公司 | Electromagnetic shielding device for electronic equipment |
| CN117794213B (en) * | 2023-12-29 | 2024-06-04 | 南通诚业德精密组件有限公司 | Electromagnetic shielding device for electronic equipment |
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Application publication date: 20210730 |