CN105306163A - Portable recording shielding device and realizing method thereof - Google Patents
Portable recording shielding device and realizing method thereof Download PDFInfo
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- CN105306163A CN105306163A CN201510718242.9A CN201510718242A CN105306163A CN 105306163 A CN105306163 A CN 105306163A CN 201510718242 A CN201510718242 A CN 201510718242A CN 105306163 A CN105306163 A CN 105306163A
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Abstract
The invention discloses a portable recording shielding device and a realizing method thereof. The device includes that an ultrasonic signal generator module is used for generating a multi-frequency clock ultrasonic electric signal, a random number generator module is used for a random number sequence, an encrypting module is used for encrypting the random number sequence, a transformer is used for amplifying the multi-frequency clock ultrasonic electric signal, and an ultrasonic probe is used for carrying out electric-acoustic conversion on the ultrasonic electric signal and transmitting an ultrasonic signal. The method comprises the following steps: a main controller judges the frequency of the multi-frequency clock ultrasonic electric signal and further detects the electric quantity, and if the electric quantity is higher than a threshold value, the main controller controls a mini fan to dissipate heat, or otherwise conducts automatic shutdown to finish the process. The device and the method disclosed by the invention are capable of shielding multiple types of equipment, have the characteristics of high safety, good shielding effect, good portability, good hidden effect, good heat dissipation effect and the like, and can be used for solving the problem of voice information leakage caused by illegal recording under various circumstances, especially under a mobile context.
Description
Technical field
The invention belongs to recording shield technology field, be specifically related to a kind of portable recording screening arrangement and its implementation.
Background technology
The U.S. Snowdon " prism door event " occurred for 2013 causes huge impact to west and even All Around The World, and this event table understands the hidden danger that there is a large amount of information-leakages in current life.Information security is the lifeline of an enterprise, a department and even whole country.If confidential information is revealed, to be so no matter that therefore country, government department, enterprise and even individual can suffer immeasurable loss.Divulge a secret for voice recording and also there is no effective solution both at home and abroad at present, how to block various sound pick-up outfit, thus prevent the divulging a secret with regard to a problem demanding prompt solution in the informatization of Cheng Liao China of voice messaging.The appearance of recording shielding device can effectively solve this problem.
Recording shielding device, also known as recording cropper or recording block device etc., is mainly used in preventing the equipment such as mobile phone, recording pen from illegally recording.The recording shielding device overwhelming majority domestic is at present all based on electromagnetic interference and this two schemes of background noise, such scheme can only form recording shielding by the equipment lower to integrated level, in use also there is obvious heard sound simultaneously, thus cause the problems such as overlay device type is few, shield effectiveness is poor, and practicality is not strong.In addition, existing recording shielding body is long-pending generally bigger than normal, does not support mobile use.Therefore existing recording shielding device cannot be applied to the especially various mobile context of all kinds of occasion better.
Summary of the invention
The invention provides a kind of portable recording screening arrangement and its implementation, the present invention can shield all kinds of sound pick-up outfit, with the problem that the voice messaging caused because illegally recording under solving under various occasion especially mobile context is divulged a secret, there is moveable characteristic simultaneously, meet real requirement, described below:
A kind of portable recording screening arrangement, described recording screening arrangement comprises: master controller, ultrasonic signal generation module, random number generation module, crypto module, transformer and ultrasonic probe,
Described master controller is connected with described random number generation module, described crypto module and described ultrasonic signal generation module respectively; Described master controller is connected with described transformer, described mini-fan; Described transformer is connected with described ultrasonic probe;
Described ultrasonic signal generation module is for generating multifrequency point ultrasonic electrical signal; Described random number generation module is for generating random number sequence; Described crypto module is used for encrypted random number sequence;
Described transformer is used for multifrequency point ultrasonic electrical signal to amplify; Described ultrasonic probe is used for realizing carrying out electroacoustic conversion to multifrequency point ultrasonic electrical signal, and launches ultrasonic signal.
Wherein, described recording screening arrangement also comprises: lithium battery, and described lithium battery is used for power supply.
Described recording screening arrangement also comprises: mini-fan, and described mini-fan is used for heat radiation.
The frequency range of described multifrequency point ultrasonic electrical signal is between 0-500Khz.
Wherein, the commercial cipher algorithm that described crypto module adopts is SM1 or SM4 algorithm.
Described ultrasonic probe adopts gas Jie property piezoelectric supersonic probe, and the sound intensity of the ultrasonic signal generated is greater than 80db.
An implementation method for portable recording screening arrangement, described implementation method comprises the following steps:
(1) ultrasonic signal generation module generates multifrequency point ultrasonic electrical signal;
(2) master controller judges whether the frequency of multifrequency point ultrasonic electrical signal is in 0-500Khz, if perform step (3), otherwise returns step (1);
(3) random number generation module generates random number sequence; Crypto module is encrypted random number sequence;
(4) master controller is by each random number in the random number sequence after encryption, respectively as the continuous output time length of the ultrasonic electrical signal of corresponding frequency, then exports the ultrasonic electrical signal of corresponding frequency to transformer according to this time span;
(5) transformer amplifies the ultrasonic electrical signal after conversion, exports ultrasonic probe to;
(6) ultrasonic probe carries out electroacoustic conversion to the ultrasonic electrical signal after amplification, and generate random ultrasonic signal, and launch, flow process terminates.
Wherein, described implementation method also comprises: master controller carries out electric power detection, if electricity is higher than threshold value, then controls mini-fan and dispels the heat; Otherwise carry out automatic shutdown, flow process terminates.
The beneficial effect of technical scheme provided by the invention is:
1) shielding device kind is many.Interference signal used in the present invention is ultrasonic signal, and its frequency is within the range of receiving of most of sound pick-up outfit sonic transducer.Therefore, the present invention has shield effectiveness to most sound pick-up outfit.
2) high security.Its distribution probability of the interference signal that the present invention launches is similar to white noise, without any rule, therefore cannot be reduced to primary speech signal by correlation techniques such as statistics, ensure that recording shielding truly, has higher fail safe.
3) shield effectiveness is good.What the present invention launched is the interference signal unordered being in a jumble similar to white noise, after this signal is recorded by sound pick-up outfit, can only hear the noise that loudness " is grown " greatly, wherein without any residual voice signal.Therefore shield effectiveness is better.
4) good portability.Device volume of the present invention is less, and built-in lithium battery, also can use under various occasion especially mobile context simultaneously.
5) disguised strong, without heard sound in device busy process of the present invention, be suitable for shielding sound pick-up outfit under hidden state.And this device also can, by the articles for daily use such as charger baby that disguise oneself as, be convenient to hide.
6) thermal diffusivity is good.Device built-in miniature fan of the present invention, can prevent works long hours causes temperature too high.
Relative to prior art, the present invention has the features such as shielding device kind is many, fail safe is high, shield effectiveness is good, portable, disguise strong, thermal diffusivity is good, can all kinds of sound pick-up outfit of shielding, the problem that the voice messaging caused because illegally recording under can solving under various occasion especially mobile context is divulged a secret.
Accompanying drawing explanation
Fig. 1 is the structural representation of portable recording screening arrangement;
Fig. 2 is the flow chart of the implementation method of portable recording screening arrangement.
In accompanying drawing, the list of parts representated by each label is as follows:
1: master controller; 2: ultrasonic signal generation module;
3: random number generation module; 4: crypto module;
5: transformer; 6: ultrasonic probe;
7: lithium battery; 8: mini-fan.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below embodiment of the present invention is described further in detail.
Embodiment 1
A kind of portable recording screening arrangement, see Fig. 1, this recording screening arrangement comprises: master controller 1, ultrasonic signal generation module 2, random number generation module 3, crypto module 4, transformer 5, ultrasonic probe 6, lithium battery 7 and mini-fan 8.
Master controller 1 is connected with ultrasonic signal generation module 2 by Serial Peripheral Interface (SPI) (adopting general UART interface); Master controller 1 (adopts general I by Serial Peripheral Interface (SPI)
2c interface) be connected with random number generation module 3; Master controller 1 is connected with crypto module 4 by Serial Peripheral Interface (SPI) (adopting general SPI interface);
Master controller 1 is also connected with mini-fan 8 with transformer 5, lithium battery 7; Transformer 5 is connected with ultrasonic probe 6.
Master controller 1 generates multifrequency point ultrasonic electrical signal by ultrasonic signal generation module 2.
Master controller 1 generates the seed of random signal by random number generation module 3.Due to the randomness of the data that random number generation module 3 generates, ensure that the voice messaging by shielding interference cannot reduce.
Master controller 1, by crypto module 4, adopts the close algorithm of high safe state to be encrypted computing to the random number that random number generation module 3 generates, realizes the enciphered data of high security.
Crypto module 4 in the embodiment of the present invention be through the certification of national Password Management office and model examination & approval, the cryptographic algorithm of employing has SM1 or SM4 cryptographic algorithm.This crypto module 4 adopts techniques well known in the art, and the embodiment of the present invention does not repeat this.
Multifrequency point ultrasonic electrical signal is amplified by transformer 5 by master controller 1, exports ultrasonic probe 6 to.
Ultrasonic probe 6 is used for carrying out electroacoustic conversion to the ultrasonic electrical signal after amplifying, and launches powerful ultrasonic signal.
Lithium battery 7 is also respectively master controller 1, ultrasonic signal generation module 2, random number generation module 3, crypto module 4, transformer 5, ultrasonic probe 6 and mini-fan 8 and powers.
Mini-fan 8 dispels the heat for whole device.
Wherein, the embodiment of the present invention is not restricted the chip model that master controller 1 adopts, and the preferred model of the embodiment of the present invention is that the chip of AT91SAM7X256 realizes.
The embodiment of the present invention is not restricted the chip model that ultrasonic signal generation module 2 adopts, and the preferred model of the embodiment of the present invention is that QUALCOMMQ2368 chip realizes.
Random number generation module 3 in the embodiment of the present invention is through the real random number generator of the certification of national Password Management office and model examination & approval.
The multifrequency point ultrasonic electrical signal that ultrasonic signal generation module 2 in the embodiment of the present invention generates, its frequency range should be between 0-500Khz.
Ultrasonic probe 6 in the embodiment of the present invention adopts gas Jie property piezoelectric supersonic to pop one's head in, and the ultrasonic signal generated, its sound intensity should be greater than 80db.
Due to (people's ear not audible) within the range of receiving that the frequency of this ultrasonic signal is in sound pick-up outfit sonic transducer.As long as guarantee that the signal sound in its working region is powerful in 80db, this acoustical power transmitted just can be made much larger than the acoustical power of sound source, just compacting interference can be formed to sound source under silent condition, sound pick-up outfit is made to be recorded to noise information, and this noise cannot be reduced into useful voice messaging, thus realize shielding recording.
The embodiment of the present invention is to the model of each device except doing specified otherwise, and the model of other devices does not limit, as long as can complete the device of above-mentioned functions.
Embodiment 2
An implementation method for portable recording screening arrangement, see Fig. 1 and 2, the implementation method of this recording screening arrangement specifically comprises the following steps:
(1) lithium battery 7 is powered, and master controller 1 detects power up, and carries out initialization, completes initial configuration;
(2) master controller 1 pair of lithium battery 7 carries out electric power detection, if electricity is higher than threshold value, then perform step (3), otherwise carry out automatic shutdown process, flow process terminates;
(3) master controller 1 dispels the heat by controlling mini-fan 8;
(4) master controller 1 generates multifrequency point ultrasonic electrical signal by ultrasonic signal generation module 2;
(5) master controller 1 judges whether its frequency of multifrequency point ultrasonic electrical signal generated is in 0-500Khz, if so, performs step (6), otherwise returns step (4);
(6) master controller 1 generates random number sequence by random number generation module 3;
(7) master controller 1 is by crypto module 4, adopts secure cryptographic algorithm to be encrypted random number sequence;
(8) master controller 1 is by each random number in the random number sequence after encryption, respectively as the continuous output time length of the ultrasonic electrical signal of corresponding frequency, (namely each random number has a corresponding frequency, the concrete numerical value of random number is as continuous output time length), then export the ultrasonic electrical signal of corresponding frequency to transformer according to this time span;
(9) transformer 5 amplifies the ultrasonic electrical signal after conversion, exports ultrasonic probe 6 to;
(10) ultrasonic probe 6 carries out electroacoustic conversion to the ultrasonic electrical signal amplified, and generate random high-power ultrasonics signal, and launch, flow process terminates.
In sum, the embodiment of the present invention is achieved by above-mentioned steps can shield all kinds of sound pick-up outfit, with the problem that the voice messaging caused because illegally recording under solving under various occasion especially mobile context is divulged a secret, there is moveable characteristic simultaneously, meet real requirement.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a portable recording screening arrangement, is characterized in that, described recording screening arrangement comprises: master controller, ultrasonic signal generation module, random number generation module, crypto module, transformer and ultrasonic probe,
Described master controller is connected with described random number generation module, described crypto module and described ultrasonic signal generation module respectively; Described master controller is connected with described transformer, described mini-fan; Described transformer is connected with described ultrasonic probe;
Described ultrasonic signal generation module is for generating multifrequency point ultrasonic electrical signal; Described random number generation module is for generating random number sequence; Described crypto module is used for encrypted random number sequence;
Described transformer is used for multifrequency point ultrasonic electrical signal to amplify; Described ultrasonic probe is used for realizing carrying out electroacoustic conversion to multifrequency point ultrasonic electrical signal, and launches ultrasonic signal.
2. the portable recording screening arrangement of one according to claim 1, is characterized in that, described recording screening arrangement also comprises: lithium battery, and described lithium battery is used for power supply.
3. the portable recording screening arrangement of one according to claim 1, is characterized in that, described recording screening arrangement also comprises: mini-fan, and described mini-fan is used for heat radiation.
4. the portable recording screening arrangement of one according to claim 1, is characterized in that, the frequency range of described multifrequency point ultrasonic electrical signal is between 0-500Khz.
5. the portable recording screening arrangement of one according to claim 1, is characterized in that, the commercial cipher algorithm that described crypto module adopts is SM1 or SM4 algorithm.
6. the portable recording screening arrangement of one according to claim 1, is characterized in that, described ultrasonic probe adopts gas Jie type piezo ultrasound transducers, and the sound intensity of the ultrasonic signal generated is greater than 80db.
7., for an implementation method for a kind of portable recording screening arrangement described in claim arbitrary in claim 1-6, it is characterized in that, described implementation method comprises the following steps:
(1) ultrasonic signal generation module generates multifrequency point ultrasonic electrical signal;
(2) master controller judges whether the frequency of multifrequency point ultrasonic electrical signal is in 0-500Khz, if perform step (3), otherwise returns step (1);
(3) random number generation module generates random number sequence; Crypto module is encrypted random number sequence;
(4) master controller is by each random number in the random number sequence after encryption, respectively as the continuous output time length of the ultrasonic electrical signal of corresponding frequency, then exports the ultrasonic electrical signal of corresponding frequency to transformer according to this time span;
(5) transformer amplifies the ultrasonic electrical signal after conversion, exports ultrasonic probe to;
(6) ultrasonic probe carries out electroacoustic conversion to the ultrasonic electrical signal after amplification, and generate random ultrasonic signal, and launch, flow process terminates.
8. the implementation method of portable recording screening arrangement according to claim 7, it is characterized in that, described implementation method also comprises:
Master controller carries out electric power detection, if electricity is higher than threshold value, then controls mini-fan and dispels the heat; Otherwise carry out automatic shutdown, flow process terminates.
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| CN201510718242.9A CN105306163B (en) | 2015-10-29 | 2015-10-29 | The portable recording screening arrangement of one kind and its implementation |
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| CN201510718242.9A CN105306163B (en) | 2015-10-29 | 2015-10-29 | The portable recording screening arrangement of one kind and its implementation |
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| CN105306163A true CN105306163A (en) | 2016-02-03 |
| CN105306163B CN105306163B (en) | 2019-09-20 |
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Cited By (2)
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| CN107846259A (en) * | 2017-11-19 | 2018-03-27 | 天津光电安辰信息技术股份有限公司 | A kind of omnidirectional's recording screening arrangement and its implementation |
| CN117254875A (en) * | 2023-11-07 | 2023-12-19 | 长春理工大学 | Portable desk-top anti-recording device |
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| CN105306163B (en) | 2019-09-20 |
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