CN107911192A - The interference system of thief-proof playback - Google Patents
The interference system of thief-proof playback Download PDFInfo
- Publication number
- CN107911192A CN107911192A CN201711310873.2A CN201711310873A CN107911192A CN 107911192 A CN107911192 A CN 107911192A CN 201711310873 A CN201711310873 A CN 201711310873A CN 107911192 A CN107911192 A CN 107911192A
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- Prior art keywords
- sent
- signal
- field controller
- generator
- modulation module
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Classifications
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- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/80—Jamming or countermeasure characterized by its function
- H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
- H04K3/825—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection by jamming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
- H04L9/0869—Generation of secret information including derivation or calculation of cryptographic keys or passwords involving random numbers or seeds
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Burglar Alarm Systems (AREA)
Abstract
The invention discloses the interference system of thief-proof playback, including sender unit and the modulation module being connected on sender unit, the modulation module also passes sequentially through encryption processing module and random number generator is connected with field controller, and power module and electromagnetic wave generator matched with modulation module, supersonic generator are also associated with the field controller；System produces random sequence with random number generator, computing is encrypted to it using encryption processor, the radio frequency and ultrasonic signal that encrypted sequence pair electromagnetic wave generator and supersonic generator are sent are modulated, produce have can not restore, noiseless and aliasing interference signal, the signal disturbs sound collection equipment, is blocked so as to fulfill recording.Provide a kind of brand-new shielding interference system.
Description
Technical field
The present invention relates to a kind of signal interference system, and in particular to the interference system of thief-proof playback.
Background technology
Nowadays, either expanding economy, or the fierceness of domestic and international market are striven unexpectedly, and information security all plays decisive
Effect.Especially security assurance information is increasingly dependent in production, business and innovation area, success and the development of corporate operation
The constantly improve of work.It can be said that information security concerns each national vital interests.The information environment for creating safety is existing
For the indispensable condition of social development, because the every field in country specific activity all suffers from various security threats.
It is well known that information can become raw material, product or service, correctly using information can bring interests on material and
Benefit.Therefore, the owner of each information pays special attention to information security, pays attention to keeping secret, and establishes and perfect information is protected
System, in order to avoid accessed and stolen by hacker.Hacker is probably a people, it is also possible to a tissue.They are interested be as
What obtains secret information.The ubiquitous spy in the world today steals economic information, military information, political affairs by various secret means
Information and scientific and technological information are controlled, by being used after analysis.With the development of market economy and the popularization of internet, belonged in the past
In many equipment of intelligence department's control, all have spread to now in society.
Technology path is included with two kinds of frequency acoustic jamming and electromagnetic interference used by recording shielding at present.Wherein, together
The shortcomings that frequency acoustic jamming is directly disturbed using audio signal, and interference effect is preferable, but maximum is that have audible noise, Yong Hubi
Must wear and earphone or voice communication be carried out in shielding house, limitation is too big, can only under some more special occasions ability
Use, this method is restricted by environmental condition, while can also give people to bring interference and inconvenience, and user can not receive.And radiate
Conflicting mode then disturbs sound pick-up outfit using frequency electromagnetic waves, and interference, the latter can be realized in the case of asonant
It is mainly for old-fashioned sound pick-up outfit, such as cassette recorder, analog recording pen.For some new-type sound pick-up outfits, such as
Mobile phone, digital recording pen etc., its interference effect is extremely limited, so that cause that overlay device type is few, shield effectiveness is poor, practicality
The problems such as not strong.Therefore existing shielding product can not preferably meet existing demand.
The content of the invention
The technical problems to be solved by the invention are that therefore existing shielding product can not preferably meet existing demand,
Purpose is the interference system for providing thief-proof playback, and existing need can not preferably be met by solving therefore existing shielding product
The problem of asking.
The present invention is achieved through the following technical solutions：
The interference system of thief-proof playback, including sender unit and the modulation mould that is connected on sender unit
Block, the modulation module also passes sequentially through encryption processing module and random number generator is connected with field controller, the scene
Power module and electromagnetic wave generator matched with modulation module, supersonic generator are also associated with controller；
Electromagnetic wave generator：The trigger signal that field controller is sent is received, generation electromagnetic wave signal is sent to modulation mould
Block；
Supersonic generator：The trigger signal that field controller is sent is received, generation ultrasonic signal is sent to modulation mould
Block；
Random number generator：The trigger signal that field controller is sent is received, one group of random sequence of generation is sent to encryption
Processor；
Encryption processor：Receive the random sequence that random number generator is sent to be encrypted, the encryption data of generation is sent out
It is sent to modulation module；
Modulation module：The encryption data that encryption processor is sent is received, electromagnetic wave generator is sent according to encryption data
Electromagnetic wave signal and supersonic generator send ultrasonic signal be modulated, by modulated signal be sent to signal hair
Injection device；
Field controller：After powering on, trigger signal is sent to random number generator, electromagnetic wave generator and ultrasonic wave
Generator.
System produces random sequence with random number generator, computing is encrypted to it using encryption processor, after encryption
Sequence pair electromagnetic wave generator and the radio frequency that sends of supersonic generator and ultrasonic signal be modulated, producing has and can not answer
Former, noiseless and aliasing interference signal, the signal disturb sound collection equipment, are blocked so as to fulfill recording.Work is former
Reason is：There are substantial amounts of electronic component, such as capacitance, resistance, IC in electronic equipment, when these electronic components be exposed to compared with
, can absorption of electromagnetic energy in strong electromagnetic field.For sound pick-up outfit, on the one hand, electromagnetic energy can pass through sound pick-up outfit
Transducer, the medium such as power cord be coupled to inside sound pick-up outfit, destroy the electronic functionalities of its front end.Meanwhile recording is set
Cylindrical conductor in standby, such as metal lead wire, metal connector, and the loop being made of metallic conductor, such as the circuit of pcb board
Deng can form inductive voltage and current in the electromagnetic field of alternation, sensitive electronic device is impacted.On the other hand,
Electromagnetic energy can invade the inside of sound pick-up outfit by the gap or hole of sound pick-up outfit, into the electromagnetism inside equipment
Pulse by directly irradiation inside electronic component, such as various transistors, integrated circuit, chip, comparator, operational amplifier
Deng.So as to produce stronger immediate current or higher transient voltage.This product realizes that technology path is to use a kind of function
Property interference source realizes that the interference to recording is blocked.Intercept unit of recording produces radio frequency, multifrequency and ultrasonic signal, realizes to record
The direct interference of sound equipment, reaches the effect that recording failure or recording effect reduce.
The power module uses lithium battery.The limitation of fixed power source has been broken away from using lithium battery power supply, has made it using more
There is flexibility.
Trigger module is additionally provided with the field controller.Trigger module uses audio-switch, when having detected sound
When turn on field controller, control field controller is started to work, and the power supply of field controller is disconnected in no sound, is saved
Electricity consumption, extends usage time.
It is also associated with being arranged on the indicator light of equipment surface on the field controller.Due to ultrasonic wave and electromagnetic wave people all
It is detectable, therefore, user can only judge the working status of equipment by being arranged on the indicator light of equipment surface.
Compared with prior art, the present invention have the following advantages and advantages：
1st, the interference system of the thief-proof playback of the present invention, the system use the mixing perturbation technique that high frequency low-frequency phase combines,
High-frequency Interference carries out the interference of electromagnetic radiation from the angle of electronic device EMC, disturbs its normal work；Low-frequency disturbance is from being mixed into original
The angle of voice signal, there is provided a kind of vox capitis signal, and this voice signal is similarly not heard sound；Low-and high-frequency is combined
Technology, compensate for the situation that the single High-frequency Interference technology speech ciphering equipment perfect to some electronic shields can not disturb, and have
The amount of electromagnetic radiation for reducing single High-frequency Interference of effect, makes product more environmentally-friendly；
2nd, the interference system of the thief-proof playback of the present invention, this product is static during the work time, noiseless, division operation person's prompting
Outside, without any other discernable part, and the cooperation and camouflage of environment can be carried out according to surrounding environment, there is high security.
Brief description of the drawings
Attached drawing described herein is used for providing further understanding the embodiment of the present invention, forms one of the application
Point, do not form the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is present system structure diagram.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment 1
As shown in Figure 1, the interference system of the thief-proof playback of the present invention, including sender unit are launched with signal is connected to
MC1496 modulation modules on device, the modulation module also pass sequentially through AT89S51 encryption processing modules and STM32 random numbers
Maker is connected with iMx.8 field controllers, and power module is also associated with the field controller and is matched with modulation module
LC electromagnetic wave generators, RC supersonic generators；System produces random sequence with random number generator, using encryption processor
It is encrypted computing, the radio frequency and ultrasonic signal that encrypted sequence pair electromagnetic wave generator and supersonic generator are sent
Be modulated, produce have can not restore, noiseless and aliasing interference signal, which disturbs sound pick-up outfit so that
Realize that recording is blocked.Operation principle is：There are substantial amounts of electronic component, such as capacitance, resistance, IC in electronic equipment, when this
A little electronic components are exposed in stronger electromagnetic field, can absorption of electromagnetic energy.For sound pick-up outfit, on the one hand, electromagnetism
Energy can be coupled to inside sound pick-up outfit by mediums such as the transducer of sound pick-up outfit, power cords, destroy the electronics of its front end
Functions of the equipments.Meanwhile the cylindrical conductor in sound pick-up outfit, such as metal lead wire, metal connector, and be made of metallic conductor
The circuit of loop, such as pcb board, can form inductive voltage and current in the electromagnetic field of alternation, to sensitive electronic device
Impact.On the other hand, electromagnetic energy can invade the inside of sound pick-up outfit by the gap or hole of sound pick-up outfit,
Into the electromagnetic pulse inside equipment by the internal electronic component of directly irradiation, as various transistors, integrated circuit, chip,
Comparator, operational amplifier etc..So as to produce stronger immediate current or higher transient voltage.This product realizes technology
Route is to realize that the interference to recording is blocked using a kind of feature interference source.Record intercept unit produce radio frequency, multifrequency and
Ultrasonic signal, realizes the direct interference to sound pick-up outfit, reaches the effect that recording failure or recording effect reduce.The electricity
Source module uses lithium battery.The limitation of fixed power source is broken away from using lithium battery power supply, using it more has flexibility.It is described existing
Trigger module is additionally provided with the controller of field.Trigger module uses audio-switch, and field control is turned on when having detected sound
Device, control field controller are started to work, and the power supply of field controller are disconnected in no sound, using electricity wisely, extends and use
Time.It is also associated with being arranged on the indicator light of equipment surface on the field controller.Since ultrasonic wave and electromagnetic wave people are all examined
Feel less than therefore, user can only judge the working status of equipment by being arranged on the indicator light of equipment surface.
Electromagnetic wave generator：The trigger signal that field controller is sent is received, generation electromagnetic wave signal is sent to modulation mould
Block；
Supersonic generator：The trigger signal that field controller is sent is received, generation ultrasonic signal is sent to modulation mould
Block；
Random number generator：The trigger signal that field controller is sent is received, one group of random sequence of generation is sent to encryption
Processor；
Encryption processor：Receive the random sequence that random number generator is sent to be encrypted, the encryption data of generation is sent out
It is sent to modulation module；
Modulation module：The encryption data that encryption processor is sent is received, electromagnetic wave generator is sent according to encryption data
Electromagnetic wave signal and supersonic generator send ultrasonic signal be modulated, by modulated signal be sent to signal hair
Injection device；
Field controller：After powering on, trigger signal is sent to random number generator, electromagnetic wave generator and ultrasonic wave
Generator.
Above-described embodiment, has carried out the purpose of the present invention, technical solution and beneficial effect further
Describe in detail, it should be understood that the foregoing is merely the embodiment of the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution, improvement and etc. done, should all include
Within protection scope of the present invention.
Claims (4)
1. the interference system of thief-proof playback, including sender unit and the modulation module that is connected on sender unit,
It is characterized in that, the modulation module also passes sequentially through encryption processing module and random number generator is connected with field controller,
Power module and electromagnetic wave generator matched with modulation module, supersonic generator are also associated with the field controller；
Electromagnetic wave generator：The trigger signal that field controller is sent is received, generation electromagnetic wave signal is sent to modulation module；
Supersonic generator：The trigger signal that field controller is sent is received, generation ultrasonic signal is sent to modulation module；
Random number generator：The trigger signal that field controller is sent is received, one group of random sequence of generation is sent to encryption
Device；
Encryption processor：Receive the random sequence that random number generator is sent to be encrypted, the encryption data of generation is sent to
Modulation module；
Modulation module：Receive the encryption data that encryption processor is sent, the electricity sent according to encryption data to electromagnetic wave generator
The ultrasonic signal that magnetostatic wave signal and supersonic generator are sent is modulated, and modulated signal is sent to signal transmitting dress
Put；
Field controller：After powering on, send trigger signal and occur to random number generator, electromagnetic wave generator and ultrasonic wave
Device.
2. the interference system of thief-proof playback according to claim 1, it is characterised in that the power module is using lithium electricity
Pond.
3. the interference system of thief-proof playback according to claim 1, it is characterised in that also set on the field controller
It is equipped with trigger module.
4. the interference system of thief-proof playback according to claim 1, it is characterised in that also connect on the field controller
It is connected to the indicator light for being arranged on equipment surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711310873.2A CN107911192A (en) | 2017-12-11 | 2017-12-11 | The interference system of thief-proof playback |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711310873.2A CN107911192A (en) | 2017-12-11 | 2017-12-11 | The interference system of thief-proof playback |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107911192A true CN107911192A (en) | 2018-04-13 |
Family
ID=61865077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711310873.2A Withdrawn CN107911192A (en) | 2017-12-11 | 2017-12-11 | The interference system of thief-proof playback |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107911192A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108769841A (en) * | 2018-04-24 | 2018-11-06 | 新疆大学 | A kind of the recording cutting device and its implementation of remote control |
| CN110096902A (en) * | 2019-03-15 | 2019-08-06 | 杭州钱袋金融信息服务有限公司 | A kind of vocal print encryption device and method |
| CN110098890A (en) * | 2019-01-26 | 2019-08-06 | 鼎铉商用密码测评技术(深圳)有限公司 | A kind of interference signal generator, shell and shell |
| CN113539225A (en) * | 2021-07-22 | 2021-10-22 | 北京电信易通信息技术股份有限公司 | On-vehicle anti-eavesdropping device based on strong acoustic transducer array |
| CN114268406A (en) * | 2021-12-31 | 2022-04-01 | 深圳市安卫普科技有限公司 | Interference device |
| CN114696940A (en) * | 2022-03-09 | 2022-07-01 | 电子科技大学 | Recording prevention method for meeting room |
| CN116667967A (en) * | 2023-07-31 | 2023-08-29 | 国密蓝盾(山东)信息安全技术有限公司 | Method and system for preventing eavesdropping and recording in conference room |
-
2017
- 2017-12-11 CN CN201711310873.2A patent/CN107911192A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108769841A (en) * | 2018-04-24 | 2018-11-06 | 新疆大学 | A kind of the recording cutting device and its implementation of remote control |
| CN110098890A (en) * | 2019-01-26 | 2019-08-06 | 鼎铉商用密码测评技术(深圳)有限公司 | A kind of interference signal generator, shell and shell |
| CN110096902A (en) * | 2019-03-15 | 2019-08-06 | 杭州钱袋金融信息服务有限公司 | A kind of vocal print encryption device and method |
| CN113539225A (en) * | 2021-07-22 | 2021-10-22 | 北京电信易通信息技术股份有限公司 | On-vehicle anti-eavesdropping device based on strong acoustic transducer array |
| CN113539225B (en) * | 2021-07-22 | 2022-02-11 | 北京电信易通信息技术股份有限公司 | On-vehicle anti-eavesdropping device based on strong acoustic transducer array |
| CN114268406A (en) * | 2021-12-31 | 2022-04-01 | 深圳市安卫普科技有限公司 | Interference device |
| CN114696940A (en) * | 2022-03-09 | 2022-07-01 | 电子科技大学 | Recording prevention method for meeting room |
| CN114696940B (en) * | 2022-03-09 | 2023-08-25 | 电子科技大学 | Conference room anti-recording method |
| CN116667967A (en) * | 2023-07-31 | 2023-08-29 | 国密蓝盾(山东)信息安全技术有限公司 | Method and system for preventing eavesdropping and recording in conference room |
| CN116667967B (en) * | 2023-07-31 | 2023-10-10 | 国密蓝盾(山东)信息安全技术有限公司 | Method and system for preventing eavesdropping and recording in conference room |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180413 |
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| WW01 | Invention patent application withdrawn after publication |