Terminal anti-eavesdropping device and system thereof

Abstract

The utility model relates to the technical field of eavesdropping prevention, in particular to a terminal anti-eavesdropping device and a terminal anti-eavesdropping system. The device comprises a first connection module, an audio management module, a storage module and an access management module, and the first connection module is used for establishing communication connection with an external terminal to obtain the audio control authority of the external terminal and obtain to-be-stored data; the audio management module is connected with the access management module, and a preset audio signal is built in the audio management module and is transmitted to the access management module; the access management module is connected with the first connection module, the storage module and the audio management module, and the access management module is used for performing data transmission with the storage module, performing data transmission with an external terminal through the first connection module and transmitting a preset audio signal to the external terminal through the first connection module. On the basis of anti-eavesdropping, the system also has data storage and reading functions, and has richer functions.

Description

Technical Field

[0001] This utility model relates to the field of anti-eavesdropping technology, and in particular to a terminal anti-eavesdropping device and system. Background Technology

[0002] With the advancement of technology and the development of society, smart terminals such as mobile phones and laptops have brought great convenience to people's lives and have become an indispensable part of people's lives.

[0003] In related technologies, software installed on smart terminals can access the terminal's microphone to record audio, facilitating the quick acquisition and processing of user information. However, because users are unaware of whether a mobile application is accessing the microphone for recording, their private calls or audio data may be maliciously eavesdropped on.

[0004] To address the aforementioned issues, users can disable the microphone permissions of the corresponding software in the background of their smart terminal, or connect a terminal anti-eavesdropping device to the smart terminal to collect sound signals from the environment in which the smart terminal is used, process the sound signals, and then transmit them to the smart terminal to prevent eavesdropping. However, existing terminal anti-eavesdropping devices only have anti-eavesdropping functions, which are relatively limited. Utility Model Content

[0005] The technical problem to be solved by this utility model embodiment is to provide a terminal anti-eavesdropping device and system to solve the problem that the terminal anti-eavesdropping device in the prior art has a relatively simple function.

[0006] This utility model discloses a terminal anti-eavesdropping device, including a first connection module, an audio management module, a storage module, and an access management module. The first connection module is used to establish a communication connection with an external terminal to obtain audio control permissions from the external terminal and to transmit data with the external terminal. The audio management module is connected to the access management module and has a built-in preset audio signal, which it transmits to the access management module. The access management module is connected to the first connection module, the storage module, and the audio management module. The access management module is used to transmit data with the storage module and to transmit data with the external terminal through the first connection module, and to transmit the preset audio signal to the external terminal through the first connection module.

[0007] Optionally, the access management module includes an access management chip, the access management chip is provided with a first communication interface, the storage module includes a flash memory, the flash memory is provided with a second communication interface, and the second communication interface is connected to the first communication interface.

[0008] Optionally, the first connection module is a connector for inserting into the external interface of an external terminal. The connector is a Micro USB connector, a Type-C connector, or a Lightning connector.

[0009] Optionally, the connector is provided with a first data transmission pin, the audio management module includes a DSP chip, the DSP chip is provided with a second data transmission pin, the access management chip is provided with a third data transmission pin and a fourth data transmission pin, the third data transmission pin is connected to the first data transmission pin, and the fourth data transmission pin is connected to the second data transmission pin.

[0010] Optionally, the terminal anti-eavesdropping device further includes a second connection module and a charging module. The second connection module is used to connect to an external adapter to obtain power. The charging module is located between the first connection module and the second connection module. The charging module is used to convert the power obtained by the second connection module and then charge the external terminal through the first connection module.

[0011] Optionally, the charging module includes a fast charging chip, which is connected to the first connection module and the second connection module. The fast charging chip is provided with a power output pin, which is connected to the power supply terminal of the audio management module.

[0012] Optionally, the terminal anti-eavesdropping device further includes a voltage regulator module, the voltage input terminal of which is connected to the power output pin of the fast charging chip, and the voltage output terminal is connected to the power supply terminal of the audio management module and the power supply terminal of the access management module.

[0013] Optionally, the second connection module includes a USB-A interface, a Type-C interface, or a Lightning interface, which is used to connect an external adapter to obtain power.

[0014] Optionally, the terminal anti-eavesdropping device further includes a housing and a circuit board disposed within the housing. The first connection module, audio management module, storage module, access management module, and second connection module are all disposed on the circuit board. The first connection module and the second connection module are distributed on opposite sides of the circuit board, and the first connection module is partially exposed outside the housing.

[0015] This utility model also discloses a terminal anti-eavesdropping system, including a terminal and a terminal anti-eavesdropping device as described above. The terminal can establish a communication connection with the first connection module of the terminal anti-eavesdropping device and receive preset audio signals and transmit data to be stored.

[0016] Compared with the prior art, the beneficial effects of the terminal anti-eavesdropping device provided in this utility model embodiment are as follows: by setting a first connection module, an audio management module, a storage module, and an access management module, the audio management module has a built-in preset audio signal and can transmit the preset audio signal to the access management module. The access management module can transmit the preset audio signal to an external terminal through the first connection module, and simulate the external microphone of the external terminal to return the built-in preset audio signal to the external terminal without setting a microphone, thereby achieving anti-eavesdropping. In addition, the access management module can transmit data with the storage module and transmit data with the external terminal through the first connection module, and has the function of storing and retrieving data. Therefore, the terminal anti-eavesdropping device of this application has the functions of data storage and retrieval in addition to anti-eavesdropping, and has richer functions and a better user experience. Attached Figure Description

[0017] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0018] Figure 1 This is a structural block diagram of an embodiment of the terminal anti-eavesdropping device provided by this utility model;

[0019] Figure 2 This is a simplified circuit diagram of another embodiment of the terminal anti-eavesdropping device provided by this utility model;

[0020] Figure 3 This is a circuit schematic diagram of an embodiment of the access management module provided by this utility model;

[0021] Figure 4 This is a circuit schematic diagram of an embodiment of the storage module provided by this utility model;

[0022] Figures 5A-5D This is a circuit schematic diagram of an embodiment of the audio management module provided by this utility model;

[0023] Figure 6 This is a circuit diagram of an embodiment of the first connection module provided by this utility model;

[0024] Figure 7 This is a circuit diagram of an embodiment of the charging module provided by this utility model;

[0025] Figure 8 This is a circuit diagram of an embodiment of the second connection module provided by this utility model;

[0026] Figure 9 This is a circuit diagram of an embodiment of the voltage regulator module provided by this utility model;

[0027] Figure 10This is a three-dimensional structural diagram of an embodiment of the terminal anti-eavesdropping device (excluding the housing state) provided by this utility model.

[0028] The labels for the attached figures are as follows:

[0029] 110. First connection module; J1. Type-C connector; 120. Audio management module; U3. DSP chip; 130. Storage module; U2. Flash memory; 140. Access management module; U1. Access management chip; 150. Second connection module; J2. Type-C interface; 160. Charging module; U4. Fast charging chip; 170. Voltage regulator module; 180. Circuit board. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0032] This utility model embodiment provides a terminal anti-eavesdropping device, such as Figure 1 As shown, the terminal anti-eavesdropping device includes a first connection module 110, an audio management module 120, a storage module 130, and an access management module 140.

[0033] The first connection module 110 is used to establish a communication connection with an external terminal to obtain audio control permissions from the external terminal and to obtain data to be stored.

[0034] The audio management module 120 is connected to the access management module 140. The audio management module 120 has a built-in preset audio signal and transmits it to the access management module 140.

[0035] The access management module 140 is connected to the first connection module 110, the storage module 130 and the audio management module 120. The access management module 140 is used to transmit data with the storage module 130 and transmit data with the external terminal through the first connection module 110, and to transmit preset audio signals to the external terminal through the first connection module 110.

[0036] This application establishes a first connection module 110, an audio management module 120, a storage module 130, and an access management module 140. The audio management module 120 has a built-in preset audio signal and can transmit the preset audio signal to the access management module 140. The access management module 140 can transmit the preset audio signal to an external terminal through the first connection module 110. Without a microphone, it simulates the external microphone of the external terminal and returns the built-in preset audio signal to the external terminal, thus achieving anti-eavesdropping. Furthermore, the access management module 140 can transmit data with the storage module and with the external terminal through the first connection module 110, possessing data storage and retrieval functions. Therefore, the terminal anti-eavesdropping device of this application not only has anti-eavesdropping capabilities but also data storage and retrieval functions, providing richer functionality and a better user experience.

[0037] In an optional embodiment of this application, reference is made to Figures 1 to 4 The access management module 140 includes an access management chip U1, which is provided with a first communication interface. The storage module 130 includes a flash memory U2, which is provided with a second communication interface and is connected to the first communication interface.

[0038] The access management chip U1 has the function of performing data storage and retrieval operations on the storage module 130. Specifically, the access management chip U1 can be an SMI325, SMI3252, or other commercially available USB flash drive controller chips.

[0039] Through the first communication interface of the access management chip U1 and the second communication interface of the flash memory U2, the access management chip U1 can transmit data with the flash memory U2, storing data to be stored obtained from the external terminal into the flash memory U2, or reading data from the flash memory U2 and transmitting it to the external terminal through the first connection module 110, thus realizing the functions of data storage and retrieval. The first communication interface is as follows: Figure 2 The SPI interface of the access management chip U1 shown is shown below. The second communication interface is as follows: Figure 2 The SPI interface of the flash memory U2 shown.

[0040] The first connection module 110 is a connector used to insert into the external interface of an external terminal. The connector is a Micro USB connector, a Type-C connector J1, or a Lightning connector.

[0041] The terminal eavesdropping prevention device can be plugged into an external terminal via a connector that supports USB audio protocols. After plugging into the external terminal, a handshake communication can be established, and the external terminal will automatically switch its audio input source to the terminal eavesdropping prevention device. The device then gains audio control access from the external terminal. Users simply plug the connector into the external terminal's interface for convenient use.

[0042] The Type-C connector J1 is a relatively universal standard connector, and its matching Type-C interface J2 is widely used in various terminals, such as mobile phones and tablets. Using the Type-C connector J1 as the connection module ensures compatibility and widespread availability, allowing the terminal anti-eavesdropping device to be used with more different types of terminal devices, thus exhibiting high compatibility. The Type-C connector J1 supports high-speed data transmission, offering high data transmission speed and stability, ensuring efficient and accurate data transmission. The Lightning connector also supports high-speed data transmission, as well as fast charging and audio signal transmission. In this embodiment, the Type-C connector J1 is preferably used.

[0043] In an optional embodiment of this application, reference is made to Figures 2 to 6 The connector is equipped with a first data transmission pin, such as... Figure 2 The pins D+ and D- shown indicate that the audio management module 120 includes a DSP chip U3, which has a second data transmission pin, such as... Figure 2 The pins DP and DM shown indicate that the access management chip U1 has a third data transmission pin and a fourth data transmission pin, as shown below. Figure 2 The pins shown are UD+, UD-, UD1+, UD1-, the third data transmission pin is connected to the first data transmission pin, and the fourth data transmission pin is connected to the second data transmission pin.

[0044] By setting the first data transmission pin, the second data transmission pin, the third data transmission pin, and the fourth data transmission pin, the DSP chip U3 can transmit the built-in preset audio signal to the access management chip U1. The access management chip U1 can then transmit the preset audio signal to an external terminal through a connector, and also transmit data with the external terminal through the connector.

[0045] The DSP chip U3 is a chip capable of implementing digital signal processing technology. The DSP chip U3 has built-in pre-stored preset audio signals, which can be disordered, ordered, or blank audio signals. Disordered audio signals are random audio data. Ordered audio signals are audio data exhibiting a certain pattern. Blank audio signals are signals without sound or audio content, i.e., silence signals. Specifically, the DSP chip U3 can utilize the SNC8X series chips. The circuit schematic of the DSP chip U3 is shown below. Figures 5A-5D As shown.

[0046] Specifically, the disordered audio signal can be generated in the following ways: a pseudo-random number generator can generate a random digital sequence with equal probability, and the random digital sequence can be directly output as a waveform to output the first white noise as the disordered audio signal; or the random digital sequence can be mapped to a specific voltage or audio value to output the second white noise as the disordered audio signal. The disordered audio signal is pre-stored in the DSP chip U3, and the DSP chip U3 can transmit the pre-stored disordered audio signal to the connection module through the second data transmission pin, and then transmit it to the external terminal through the first connection module 110.

[0047] Alternatively, random noise can be generated as a disordered audio signal using the inverse FFT or deconvolution method, and this generated disordered audio signal is pre-stored in the DSP chip U3. Generating random noise using the inverse FFT method involves generating a set of random frequency domain data, then converting the generated frequency domain data back to time domain data using the inverse FFT, thus generating random noise with specific spectral characteristics. Deconvolution, on the other hand, generates random noise with specific spectral characteristics through the inverse convolution operation of a specific signal. By adjusting the spectral characteristics of the convolution kernel in the inverse convolution operation, a noise signal with specific spectral characteristics can be generated using deconvolution. The disordered audio signal generated in the above methods is pre-stored in the DSP chip U3.

[0048] An ordered audio signal is a sound with a fixed pattern or regularity. An ordered audio signal can be a pre-recorded audio file. The audio file is pre-stored in the DSP chip U3. The content of the audio file can be a song, a piece of music, a human voice, a natural sound, or other sounds. Its format can be WAV, MP3, etc.

[0049] Disordered audio signals can be converted into blank audio signals by generating a data stream with all output values ​​being zero. The blank audio signal is pre-stored in the DSP chip U3 and can be transmitted to an external terminal via the connection module 110, where it can be captured and recognized.

[0050] refer to Figure 1 , Figures 6 to 8 In an optional embodiment of this application, the terminal anti-eavesdropping device further includes a second connection module 150 and a charging module 160. The second connection module 150 is used to connect to an external adapter to obtain power. The charging module 160 is located between the first connection module 110 and the second connection module 150. The charging module 160 is used to convert the power obtained by the second connection module 150 and then charge the external terminal through the first connection module 110.

[0051] By setting up a second connection module 150 and a charging module 160, the second connection module 150 can obtain power by connecting to a power supply device through an adapter, and the charging module 160 can convert the power obtained by the second connection module 150 into a suitable voltage to charge the external terminal connected to the first connection module 110. Therefore, the terminal anti-eavesdropping device of this application can not only achieve anti-eavesdropping and data transmission functions, but also achieve charging functions, thus possessing relatively rich functions.

[0052] The second connection module 150 includes a USB-A interface, a Type-C interface J2, or a Lightning interface. These interfaces are used to connect an external adapter to obtain power. All three interfaces support fast charging, allowing for rapid charging of external devices via the external adapter. In practice, the USB-A interface, Type-C interface J2, or Lightning interface can be connected to an external adapter via a charging cable.

[0053] Preferably, a Type-C interface J2 is used as the second connection module 150. The Type-C interface J2 is connected to an external adapter. The Type-C interface J2 can be plugged in and out in either direction without needing to pay attention to the insertion direction. Moreover, various adapters can support the Type-C interface. Therefore, the terminal anti-eavesdropping device with a Type-C interface has better compatibility.

[0054] In this embodiment, reference Figure 2 , Figures 6 to 8 The charging module 160 includes a fast charging chip U4, which is connected to the first connection module 110 and the second connection module 150. The fast charging chip U4 is provided with a power output pin, such as the LDO_5V pin shown in the figure. The power output pin is connected to the power terminal of the audio management module 120.

[0055] The fast charging chip U4 is a chip used to manage and control the charging process, typically used to support fast charging technology. The fast charging chip U4 effectively manages current and voltage to achieve faster charging speeds and usually has temperature monitoring capabilities. It can monitor the temperature of the chip and battery during charging. If the temperature becomes too high during charging, the fast charging chip U4 can adjust the charging speed or stop charging to protect the device being charged.

[0056] By configuring the fast charging chip U4, external terminals can be charged via fast charging, saving charging time. The power output pin of the fast charging chip U4 can also output a lower voltage to power the audio management module 120. The fast charging chip U4 can be a PD fast charging chip U4, a QC fast charging chip U4, etc. Preferably, in this embodiment, the fast charging chip U4 is a PD fast charging chip U4. The PD fast charging standard is a universal fast charging standard that supports fast charging for various devices, thus having wider compatibility and being applicable to various brands and models of terminal devices.

[0057] Furthermore, the terminal anti-eavesdropping device also includes a voltage regulator module 170. The voltage input terminal of the voltage regulator module 170 is connected to the power output pin of the fast charging chip U4, and the voltage output terminal is connected to the power supply terminal of the audio management module 120 and the power supply terminal of the access management module 140.

[0058] The voltage regulator module 170 regulates the voltage output from the power output pin of the fast charging chip U4, ensuring that the output voltage remains stable within a set range even when the input voltage fluctuates or changes. This provides a stable operating voltage for the audio management module 120 and the access management module 140. The circuit schematic of the voltage regulator module 170 is shown below. Figure 9 As shown.

[0059] refer to Figure 1 and Figure 10 In this embodiment, the terminal anti-eavesdropping device also includes a housing (not shown) and a circuit board 180 disposed inside the housing. The first connection module 110, the audio management module 120, the storage module 130, the access management module 140, and the second connection module 150 are all disposed on the circuit board 180. The first connection module 110 and the second connection module 150 are distributed on opposite sides of the circuit board 180. The first connection module 110 is partially exposed outside the housing.

[0060] The circuit board 180 provides a carrier for the first connection module 110, the audio management module 120, the storage module 130, the access management module 140, and the second connection module 150. The first connection module 110 and the second connection module 150 are distributed on opposite sides of the circuit board 180. When the first connection module 110 is connected to an external terminal, the external terminal provides a certain degree of support for the terminal's anti-eavesdropping device, and it is convenient to operate the second connection module 150 to connect to an external adapter.

[0061] This application embodiment also provides a terminal anti-eavesdropping system, including a terminal and a terminal anti-eavesdropping device as described above. The terminal can establish a communication connection with the first connection module 110 of the terminal anti-eavesdropping device, and receive preset audio signals and transmit data with the first connection module 110.

[0062] The terminal anti-eavesdropping system of this application includes a first connection module 110, an audio management module 120, a storage module 130, and an access management module 140. The audio management module 120 has a built-in preset audio signal and can transmit the preset audio signal to the access management module 140. The access management module 140 can transmit the preset audio signal to an external terminal through the first connection module 110. Without a microphone, it can simulate the external microphone of the external terminal and return the built-in preset audio signal to the external terminal, thus achieving anti-eavesdropping. Furthermore, the access management module 140 can transmit data with the storage module and with the external terminal through the first connection module 110, and has the functions of storing and retrieving data. Therefore, the terminal anti-eavesdropping device of this application not only has anti-eavesdropping capabilities but also data storage and retrieval functions, providing richer functionality and a better user experience.

[0063] It should be understood that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of the appended claims of this utility model.

Claims

1. A terminal anti-eavesdropping device, characterized in that, It includes a first connection module, an audio management module, a storage module, and an access management module, wherein, The first connection module is used to establish a communication connection with an external terminal to obtain audio control permissions from the external terminal and to transmit data with the external terminal; The audio management module is connected to the access management module. The audio management module has a built-in preset audio signal and transmits it to the access management module. The access management module connects the first connection module, the storage module, and the audio management module. The access management module is used to transmit data with the storage module and to transmit data with an external terminal through the first connection module, and to transmit a preset audio signal to an external terminal through the first connection module.

2. The terminal anti-eavesdropping device according to claim 1, characterized in that, The access management module includes an access management chip, which is provided with a first communication interface. The storage module includes a flash memory, which is provided with a second communication interface, and the second communication interface is connected to the first communication interface.

3. The terminal anti-eavesdropping device according to claim 2, characterized in that, The first connection module is a connector for inserting into the external interface of an external terminal. The connector is a Micro USB connector, a Type-C connector, or a Lightning connector.

4. The terminal anti-eavesdropping device according to claim 3, characterized in that, The connector is provided with a first data transmission pin, the audio management module includes a DSP chip, the DSP chip is provided with a second data transmission pin, the access management chip is provided with a third data transmission pin and a fourth data transmission pin, the third data transmission pin is connected to the first data transmission pin, and the fourth data transmission pin is connected to the second data transmission pin.

5. The terminal anti-eavesdropping device according to any one of claims 1 to 4, characterized in that, The terminal anti-eavesdropping device further includes a second connection module and a charging module. The second connection module is used to connect to an external power adapter to obtain power. The charging module is located between the first connection module and the second connection module. The charging module is used to convert the power obtained by the second connection module and then charge the external terminal through the first connection module.

6. The terminal anti-eavesdropping device according to claim 5, characterized in that, The charging module includes a fast charging chip, which is connected to the first connection module and the second connection module. The fast charging chip is provided with a power output pin, which is connected to the power supply terminal of the audio management module.

7. The terminal anti-eavesdropping device according to claim 6, characterized in that, The terminal anti-eavesdropping device also includes a voltage regulator module. The voltage input terminal of the voltage regulator module is connected to the power output pin of the fast charging chip, and the voltage output terminal is connected to the power supply terminal of the audio management module and the power supply terminal of the access management module.

8. The terminal anti-eavesdropping device according to claim 6, characterized in that, The second connection module includes a USB-A interface, a Type-C interface, or a Lightning interface, which is used to connect an external adapter to obtain power.

9. The terminal anti-eavesdropping device according to claim 8, characterized in that, The terminal anti-eavesdropping device also includes a housing and a circuit board disposed within the housing. The first connection module, audio management module, storage module, access management module, and second connection module are all disposed on the circuit board. The first connection module and the second connection module are distributed on opposite sides of the circuit board, and the first connection module is partially exposed outside the housing.

10. A terminal anti-eavesdropping system, characterized in that, The device includes a terminal and a terminal anti-eavesdropping device as described in any one of claims 1-9. The terminal can establish a communication connection with the first connection module of the terminal anti-eavesdropping device, and receive preset audio signals and transmit data with the first connection module.

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