Audio-video data encryption system and method

Abstract

The application discloses an audio and video data encryption system and method, and relates to the field of audio and video data encryption, which can effectively improve the security of audio and video data.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optoelectronic technology, in particular to an audio and video data encryption system and method. BACKGROUND

[0002] With the continuous development of science and technology, the continuous improvement of people's living standards, the digital intelligent terminal system such as set top box or digital television is widely used, and can be seen everywhere in people's daily life and entertainment, and users can record favorite television programs or make reservations for recording television programs to be played, so as to facilitate users to watch or collect at any time.

[0003] At present, for audio and video data, users can use digital intelligent terminal system to record the audio and video sent by the front end. However, such recording may be maliciously copied or randomly distributed without authorization, which may cause economic and copyright losses to operators. The encryption of audio and video by the front end and the encryption technology of the channel in the audio and video transmission process are mature enough. However, the encryption of audio and video data by the terminal system is currently only a simple encryption process using a simple random number or a chip unique serial number ID, which may have certain security risks and face the risk of being cracked.

[0004] The above content is only used to assist in understanding the technical solutions of the present application, and does not mean that the above content is related technology. SUMMARY

[0005] The main purpose of the present application is to provide an audio and video data encryption system and method, which aims to solve the technical problem of simple encryption of audio and video data by the terminal in the prior art.

[0006] To achieve the above purpose, the present application provides an audio and video data encryption system, which comprises a THz light source, a detection array panel, a signal processing device and an encryption processing device.

[0007] The THz light source is used to generate THz light based on a data encryption request.

[0008] The detection array panel is used to collect the THz light and convert the THz light into an analog electrical signal, and then send the analog electrical signal to the signal processing device.

[0009] The signal processing device is used to convert the analog electrical signal into encryption information and send the encryption information to the encryption processing device.

[0010] The encryption processing device is used to encrypt the audio and video metadata to be encrypted according to the encryption information to obtain target audio and video metadata.

[0011] Optionally, the detection array panel comprises a two-dimensional code optical assembly and a photoelectric conversion detector.

[0012] The two-dimensional code optical assembly is configured to collect the THz light and focus the THz light to the photoelectric conversion detector.

[0013] The photoelectric conversion detector is configured to convert the focused THz light into an analog electrical signal and send the analog electrical signal to the signal processing device.

[0014] Optionally, the two-dimensional code optical assembly comprises an absorbing film and a condenser lens.

[0015] The absorbing film is arranged on the condenser lens and configured to cover part of the condenser lens to shield the THz light.

[0016] The condenser lens is configured to focus the THz light.

[0017] Optionally, the photoelectric conversion detector comprises a detector module and a conversion module.

[0018] The detector module is configured to generate an electron current based on the focused THz light.

[0019] The conversion module is configured to convert the electron current into an analog electrical signal and send the analog electrical signal to the signal processing device.

[0020] Optionally, the signal processing device comprises a signal acquisition module, a signal amplification module, a filtering module, a signal difference module, and an analog-digital conversion module.

[0021] The signal acquisition module is configured to acquire the analog electrical signal and send the analog electrical signal to the signal amplification module.

[0022] The signal amplification module is configured to amplify the analog electrical signal and send the amplified analog electrical signal to the filtering module.

[0023] The filtering module is configured to filter the amplified analog electrical signal and send the filtered analog electrical signal to the signal difference module.

[0024] The signal difference module is configured to difference the filtered analog electrical signal and send the differentiated analog electrical signal to the analog-digital conversion module.

[0025] The analog-digital conversion module is configured to analog-digital convert the differentiated analog electrical signal to generate encrypted information and send the encrypted information to the encryption processing device.

[0026] Optionally, the signal amplification module comprises a multi-stage amplification submodule and a negative feedback module.

[0027] The multi-stage amplification submodule is configured to amplify the analog electrical signal.

[0028] The negative feedback module is configured to perform stability adjustment on the multi-stage amplification submodule through a negative feedback signal.

[0029] Optionally, the analog-digital conversion module comprises a signal conversion submodule and a threshold comparison submodule.

[0030] The signal conversion submodule is configured to perform analog-digital conversion on the differential analog electrical signal to generate a digital signal, and send the digital signal to the threshold comparison submodule.

[0031] The threshold comparison submodule is configured to compare the digital signal with a preset threshold, generate encrypted information based on a threshold comparison result, and send the encrypted information to the encryption processing device.

[0032] Optionally, the encryption processing device comprises a verification module and a storage module.

[0033] The verification module is configured to verify the encrypted information, and encrypt to-be-encrypted audio-video metadata based on the encrypted information to generate target audio-video metadata after verification.

[0034] The storage module is configured to store the target audio-video metadata.

[0035] Optionally, the THz light source comprises a controller and a THz point light source.

[0036] The controller is configured to turn on the point THz light source when receiving the data encryption request.

[0037] The THz point light source is configured to generate THz light.

[0038] In addition, to achieve the above-mentioned purpose, the application further provides an audio-video data encryption method, which comprises the following steps:

[0039] The THz light source generates THz light based on a data encryption request.

[0040] The detection array type panel collects the THz light, converts the THz light into an analog electrical signal, and sends the analog electrical signal to the signal processing device.

[0041] The signal processing device converts the analog electrical signal into encrypted information, and sends the encrypted information to the encryption processing device.

[0042] The encryption processing device encrypts the audio and video metadata to be encrypted according to the encryption information, and obtains target audio and video metadata.

[0043] The application generates THz light based on a data encryption request through a THz light source; a detection array panel collects the THz light and converts the THz light into an analog electric signal, and then sends the analog electric signal to a signal processing device; the signal processing device converts the analog electric signal into encryption information and sends the encryption information to an encryption processing device; and the encryption processing device encrypts audio and video metadata to be encrypted according to the encryption information, and obtains target audio and video metadata. Since the application converts the THz light collected by the detection array panel into an analog electric signal and sends the analog electric signal to the signal processing device to generate encryption information, and then encrypts the audio and video data through the encryption processing device based on the encryption information, the security of the audio and video data can be effectively improved compared with the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 It is a structural block diagram of the first embodiment of the audio and video data encryption system of the application;

[0045] Figure 2 It is a structural block diagram of the second embodiment of the audio and video data encryption method of the application;

[0046] Figure 3 It is a structural schematic diagram of the detection array panel in the second embodiment of the audio and video data encryption system of the application;

[0047] Figure 4 It is a planar schematic diagram of the two-dimensional code optical assembly in the detection array panel of the audio and video data encryption system of the application;

[0048] Figure 5 It is a structural block diagram of the third embodiment of the audio and video data encryption method of the application;

[0049] Figure 6 It is a flow schematic diagram of the first embodiment of the audio and video data encryption method of the application;

[0050] Figure 7 It is a flow schematic diagram of the digital intelligent terminal application scene of the first embodiment of the audio and video data encryption method of the application.

[0051] The implementation, functional features and advantages of the application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0052] It should be understood that the specific embodiments described herein are only used to explain the application, and are not used to limit the application.

[0053] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0054] It should be noted that all the direction indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the direction indications also change accordingly.

[0055] In addition, the descriptions of “first”, “second” and the like in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as “first”, “second” can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person of ordinary skill in the art, and when the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the protection scope of the present application.

[0056] With reference to Figure 1 , Figure 1 The figure is a structural block diagram of a first embodiment of an audio and video data encryption system of the present application.

[0057] As Figure 1 shown, the above-mentioned audio and video data encryption system includes a THz (Tera Hertz, Terahertz) light source 100, a detection array type panel 200, a signal processing device 300 and an encryption processing device 400.

[0058] It should be noted that the system provided in the present embodiment can be applied in a scene of encrypting audio and video data on a digital intelligent terminal, or other scenes of encrypting audio and video data. Hereinafter, the above-mentioned audio and video data encryption system (hereinafter referred to as encryption system) is used to specifically describe the present embodiment and each of the following embodiments.

[0059] In the present embodiment, the THz light source 100 is used to generate THz light based on a data encryption request.

[0060] It can be understood that the above-mentioned THz light source can be selected from a micro single-frequency THz light source, a resonant tunneling diode THz oscillation source, a thin film THz light source combined with a phase change material and a magnetostrictive material, a photoconductive THz light source made of indium antimonide material, or a semiconductor THz light source made of graphene material, and the embodiment is not limited thereto, and the purpose is to generate a high-power THz point light source. The above-mentioned data encryption request can be a pre-set instruction signal for turning on the THz point light source to generate THz light.

[0061] Further, in order to improve the convenience of use of the user, the THz light source 100 further comprises a controller 101 and a THz point light source 102.

[0062] It can be understood that the above-mentioned controller 101 is used to turn on the point THz light source when the data encryption request is received; and the above-mentioned THz point light source 102 is used to generate THz light.

[0063] It should be noted that the triggering mode of the above-mentioned data encryption request can be that the user sends a pre-set instruction signal through a key.

[0064] In the embodiment, the detection array panel 200 is used to collect the THz light, convert the THz light into an analog electrical signal, and send the analog electrical signal to the signal processing device.

[0065] In a specific implementation, the encryption system causes corresponding movement of the carrier of the detector after irradiating the THz light on the detection array panel with high resolution, wide band and high absorption rate, and then forms an electronic flow which is collected by the signal processing device, that is, the collected THz light is converted into an analog electrical signal, and the analog electrical signal is sent to the signal processing device.

[0066] In the embodiment, the signal processing device 300 is used to convert the analog electrical signal into encryption information and send the encryption information to the encryption processing device.

[0067] In a specific implementation, the encryption system generates encryption information by using the signal processing device to convert the analog electrical signal into digital information, and then sends the encryption information to the encryption processing device.

[0068] It should be noted that due to the different arrangement of the probe array panel and the shielding THz light signal, the encryption information generated by the optical system is also different. The above-mentioned encryption information can be a digital serial number, for example: 0 / 1 serial number 01011111111011011101111111100111101110111101011011111 10111101, or other serial numbers. The serial number can be directly stored in the system memory, or stored in the flash plug-in. However, due to the security of the flash plug-in cannot be guaranteed, once cracked, it means that the two-dimensional code serial number is invalid and may cause system security risk, so it loses the meaning of encryption. Therefore, if it needs to be stored in the flash plug-in, special processing is required, for example: the chip ID representing the uniqueness of the device is bound with the serial number and stored in the flash plug-in. The present embodiment does not limit this.

[0069] In the present embodiment, the encryption processing device 400 is configured to encrypt the to-be-encrypted audio / video metadata according to the encryption information, to obtain target audio / video metadata.

[0070] It can be understood that the above-mentioned target audio / video metadata needs to be decrypted if it involves scrambled data. In any case, the target audio / video metadata is normal playable audio / video data.

[0071] It should be noted that the encryption method of the above-mentioned to-be-encrypted audio / video metadata according to the encryption information is not limited to a certain algorithm, for example:

[0072] a. Simple and or operation of audio / video metadata and encryption information;

[0073] b. The encryption information is regularly inserted into the audio / video metadata at a certain audio / video timestamp or a certain frame number;

[0074] c. The encryption information is attached to the audio / video metadata, and then the crc (Cyclic Redundancy Check) is calculated and attached to the beginning of the data or inserted into the data.

[0075] It can be understood that when the user wants to play the encrypted audio / video data, the decryption can be performed through the reverse operation of the above-mentioned encryption process, and the encryption information inherent in the encryption system memory is used for verification, and finally the audio / video metadata is decrypted and played back. Match the above-mentioned encryption system, there are also many decryption methods.

[0076] Further, in order to improve the security of the audio / video data, the encryption processing device 400 further comprises a verification module 401 and a storage module 402.

[0077] It can be understood that the above-mentioned verification module 401 is used to verify the encrypted information, and after verification, the encrypted audio and video metadata to be encrypted is encrypted based on the encrypted information to generate target audio and video metadata; the above-mentioned storage module 402 is used to store the target audio and video metadata.

[0078] The embodiment generates THz light based on a data encryption request through a THz light source; a detection array panel collects the THz light and converts the THz light into an analog electrical signal, and then sends the analog electrical signal to a signal processing device; the signal processing device converts the analog electrical signal into encrypted information and sends the encrypted information to an encryption processing device; the encryption processing device encrypts the audio and video metadata to be encrypted according to the encrypted information to obtain target audio and video metadata. Since the embodiment converts the THz light into an analog electrical signal after collecting the THz light through the detection array panel and sends the analog electrical signal to the signal processing device to generate encrypted information, and then encrypts the audio and video data through the encryption processing device based on the encrypted information, compared with the prior art, the security of the audio and video data can be effectively improved.

[0079] With reference to Figure 2 , Figure 2 is a structural block diagram of a second embodiment of the audio and video data encryption system of the present application.

[0080] As Figure 2 shown, the above-mentioned detection array panel 200 further comprises a two-dimensional code optical assembly 201 and a photoelectric conversion detector 202.

[0081] In the embodiment, the two-dimensional code optical assembly 201 is used to collect the THz light and focus the THz light to the photoelectric conversion detector;

[0082] Further, in order to improve the diversity and complexity of the above-mentioned encrypted information, the two-dimensional code optical assembly 201 further comprises an absorbing film 2011 and a condenser lens 2012.

[0083] In the embodiment, the absorbing film 2011 is arranged on the condenser lens 2012 and is used to cover part of the condenser lens to shield the THz light.

[0084] For reference Figure 3, a high-sensitivity THz detection array panel is used to collect THz light, the array panel is composed of a plurality of THz absorption films, THz condensing lenses and high-precision and high-sensitivity THz element detectors integrated into pixel units arranged densely according to a certain length-width ratio. The THz light signals detected by the array pixels are further converted into electrical signals, then collected by a THz electronic circuit signal collection system and coded into a 0 / 1 sequence set by a CPU, and finally used to encrypt audio and video data. The density of the array pixels determines the number of different two-dimensional codes generated. For example, refer to Figure 4 , Figure 4 The figure is a plan view of the optical components of the two-dimensional code in the detection array panel. As can be seen, a 3*3 pixel panel can generate a maximum of 2 9 = 512 different two-dimensional codes; a 5*6 pixel panel can generate a maximum of 2 30 = 1073741824 different two-dimensional codes; and a 10*10 pixel panel can generate a maximum of 2 100 different two-dimensional codes. Therefore, regardless of the number of products, the corresponding number of two-dimensional codes can be generated, so that each machine is bound to a chip ID to achieve the purpose of chip uniqueness.

[0085] It can be understood that the above-mentioned absorption film can be a film for shielding THz light. Different from the central frequency of the THz light source, a film with a large spectral range and high absorption rate can be selected as a THz optical shield. For example, nickel, platinum, copper, cobalt or their alloys can be selected in combination with graphene materials to prepare a super-thin THz shielding film with high shielding efficiency, stability and softness through related fusion process technology. The above-mentioned condensing lens can be an optical lens for focusing THz light.

[0086] It should be noted that in order to reduce the loss of THz light waves, the wavelength of the point THz light source used will be different, and the material of the optical lens selected will also be different. For example, when the wavelength of the point THz light source is 1.2um-1000um (microns), high-resistivity float zone silicon (HRFZ-Si) crystal material can be selected. This material hardly absorbs THz light waves in this range, reducing the loss of THz light waves. When the wavelength of the light source is 200um-1000um (microns), a polymer organic material with a flat transmittance curve can be selected to improve the transmittance of the optical lens.

[0087] It should be noted that the design of this optical lens is first simulated and designed by Zemax software, and then corrected from the actual process. The factors to be considered in the design are as follows:

[0088] (1) The open rate parameter will affect the transmittance of the lens. Therefore, the density of the edge area of the light focusing pixel lens arranged in the optical lens array is as much as possible to the opening threshold of the pixel lens, and the THz light transmittance is improved.

[0089] (2) By adjusting the curvature constant and aspheric coefficient of the aspheric lens, the spherical aberration is eliminated to the maximum extent. The purpose is to improve the optical quality and converge the light to the same point. Further enhance the light intensity, indirectly improve the efficiency and sensitivity of the detector.

[0090] (3) The optical lens center of the detection pixel should be aligned with the center of the photoelectric detector, the size of the lens section is the same as the size of the photoelectric conversion detector, and the optical lens array is filled with black matrix with thickness of um (micron) level in the gap of the pixel lens. The purpose is to prevent THz light from passing through the slit between the lenses, prevent edge light interference between the pixels, and improve the utilization efficiency of the light source.

[0091] The purpose of the above implementation is to collimate and focus the THz light, so that as much light as possible hits the micro THz photoelectric detector, thereby improving the detection rate and accuracy of the THz light.

[0092] In this embodiment, the photoelectric conversion detector 202 is used to convert the focused THz light into an analog electrical signal, and send the analog electrical signal to the signal processing device.

[0093] Further, in order to effectively convert the THz light into an analog electrical signal, the photoelectric conversion detector 202 includes a detector module 2021 and a conversion module 2022.

[0094] In this embodiment, the detector module 2021 is used to form an electron current based on the internal carrier of the focused THz light;

[0095] In this embodiment, the conversion module 2022 is used to convert the electron current into an analog electrical signal, and send the analog electrical signal to the signal processing device.

[0096] In this embodiment, the absorbing film is arranged on the condenser lens, which is used to cover part of the condenser lens to shield the THz light, and form a two-dimensional code optical assembly. Then the two-dimensional code optical assembly collects the THz light, and focuses the THz light to the photoelectric conversion detector. The photoelectric conversion detector converts the focused THz light into an analog electrical signal, and sends the analog electrical signal to the signal processing device. The complexity of the encrypted information is improved, and the detection rate and accuracy of the photoelectric conversion detector to the THz light are also improved.

[0097] Referring toFigure 5 , Figure 5 Figure 3 is a structural block diagram of a third embodiment of the audio and video data encryption system of the present application.

[0098] As shown in Figure 5 , the signal processing device 300 further includes a signal acquisition module 301, a signal amplification module 302, a filtering module 303, a signal difference module 304, and an analog-to-digital conversion module 305.

[0099] In this embodiment, the signal acquisition module 301 is configured to acquire an analog electrical signal and send the analog electrical signal to the signal amplification module 302.

[0100] It should be understood that the signal acquisition module acquires the corresponding movement of the charge carriers of the detector caused by the focused THz light irradiating the detection array panel, and then forms an electronic current, i.e., an analog electrical signal.

[0101] It should be noted that the signal acquisition module 301 acquires signal change information in real time at a preset time frequency, for example, 1 second, 800 milliseconds, 500 milliseconds, etc., 20 times, 10 times, 5 times, etc., and the present embodiment does not limit the same.

[0102] In this embodiment, the signal amplification module 302 is configured to amplify the analog electrical signal and send the amplified analog electrical signal to the filtering module 303.

[0103] It should be noted that, in order to improve the stability and reliability of the amplified analog electrical signal, the signal amplification module 302 further includes a multi-stage amplification submodule 3021 and a negative feedback submodule 3022.

[0104] In this embodiment, the multi-stage amplification submodule 3021 is configured to amplify the analog electrical signal.

[0105] It should be noted that the center frequency of the analog electrical signal should be consistent or matched with the frequency of the THz light source, and then the stability and reliability of the analog electrical signal can be improved by amplifying and filtering in a small range of the center frequency.

[0106] In this embodiment, the negative feedback submodule 3022 is configured to adjust the stability of the multi-stage amplification submodule through a negative feedback signal.

[0107] In this embodiment, the filtering module 303 is configured to filter the amplified analog electrical signal and send the filtered analog electrical signal to the signal difference module 304.

[0108] In this embodiment, the signal difference module 304 is configured to perform differential processing on the filtered analog electrical signal, and send the differential analog electrical signal to the analog-digital conversion module 305.

[0109] In this embodiment, the analog-digital conversion module 305 is configured to perform analog-digital conversion on the differential analog electrical signal to generate encrypted information, and send the encrypted information to the encryption processing device 400.

[0110] Further, in order to improve the accuracy of converting the analog electrical signal into the digital signal, the analog-digital conversion module 305 further includes a signal conversion submodule 3051 and a threshold comparison submodule 3052.

[0111] In this embodiment, the signal conversion submodule 3051 is configured to perform analog-digital conversion on the differential analog electrical signal to generate a digital signal, and send the digital signal to the threshold comparison submodule.

[0112] It should be noted that the signals collected by some photoelectric conversion detectors are very weak, almost 0, because the THz light is shielded by the absorbing film. The signals collected by the photoelectric conversion detectors that are not shielded will be above 3V after signal processing. The THz light source is located at the center of the array, so the signals collected by the THz detection elements at the periphery are weaker than those collected by the central detection elements. Therefore, when the terminal is started, it needs to collect the voltage of the unshielded photoelectric conversion detector for a certain period of time. The smallest voltage collected in the signal is used as the threshold to generate the 0 / 1 sequence two-dimensional code.

[0113] In this embodiment, the threshold comparison submodule 3052 is configured to compare the digital signal with a preset threshold, generate encrypted information based on the threshold comparison result, and send the encrypted information to the encryption processing device.

[0114] It should be noted that, in order to reduce errors, the digital signal can be compared with the preset threshold multiple times. For example, the THz digital signal can be collected 20 times at a frequency of 2s collection. If 18 times reach the threshold or above in the collection, the corresponding THz pixel is considered as 1; if 18 times or more do not collect or collect weak signals, the corresponding THz pixel is considered as 0.

[0115] The embodiment amplifies the analog electric signal through the signal amplification module, and sends the amplified analog electric signal to the filtering module; the filtering module filters the amplified analog electric signal, so that the analog electric signal is smoothly amplified, the reliability and stability of the analog electric signal are improved, and then the filtered analog electric signal is sent to the signal difference module; the signal difference module differentiates the filtered analog electric signal, and sends the differentiated analog electric signal to the analog-digital conversion module; the analog-digital conversion module converts the differentiated analog electric signal into encrypted information, so that the accuracy and reliability of the encrypted information are effectively improved.

[0116] In addition, with reference to Figure 6 , Figure 6 The flowchart of the audio and video data encryption method is shown in the first embodiment of the application, and the audio and video data encryption method comprises the following steps:

[0117] Step S10: The THz light source generates THz light based on a data encryption request;

[0118] Step S20: The probe array panel collects the THz light and converts the THz light into an analog electric signal, and then sends the analog electric signal to the signal processing device;

[0119] Step S30: The signal processing device converts the analog electric signal into encrypted information, and sends the encrypted information to the encryption processing device;

[0120] Step S40: The encryption processing device encrypts the audio and video metadata to be encrypted according to the encrypted information, and obtains target audio and video metadata.

[0121] Further, in order to improve the convenience of use of the user, the above step S10 comprises:

[0122] Step S101: Turn on the point THz light source when the data encryption request is received;

[0123] Step S102: Generate THz light through the point THz light source;

[0124] Further, in order to improve the security of the audio and video data, the above step S40 comprises:

[0125] Step S401: The verification module verifies the encrypted information, and after verification, encrypts the audio and video metadata to be encrypted based on the encrypted information to generate target audio and video metadata;

[0126] Step S402: The storage module stores the target audio and video metadata.

[0127] Further, reference can be made toFigure 7 Figure 7 The figure is a flow chart of the application of the first embodiment of the audio and video data encryption method to the digital intelligent terminal.

[0128] The THz two-dimensional code is generated by a THz optical system.

[0129] The 0 / 1 sequence key is generated based on the above-mentioned THz two-dimensional code, and the 0 / 1 sequence key is sent to the data encryption processor.

[0130] The audio and video data from the front end are received by the digital intelligent terminal, and it is verified whether there is scrambling.

[0131] If yes, the audio and video data are descrambled, the audio and video metadata are obtained, and the audio and video metadata are sent to the data encryption processor.

[0132] The audio and video metadata are encrypted by the data encryption processor based on the 0 / 1 sequence key, and the encrypted PVR (Personal video recorder) data stored in a file are obtained.

[0133] In the embodiment, the THz light is generated based on a data encryption request by a THz light source, the THz light is collected by a probe array panel, the THz light is converted into an analog electrical signal, the analog electrical signal is sent to a signal processing device, the analog electrical signal is converted into encryption information by the signal processing device, the encryption information is sent to an encryption processing device, and the target audio and video metadata are obtained by encrypting the audio and video metadata to be encrypted by the encryption processing device based on the encryption information. Compared with the prior art, the security of the audio and video data can be effectively improved by converting the THz light into an analog electrical signal after collecting the THz light by the probe array panel and sending the analog electrical signal to the signal processing device to generate encryption information, and then encrypting the audio and video data by the encryption processing device based on the encryption information.

[0134] Other embodiments or specific implementations of the audio and video data encryption method can refer to the above-mentioned system embodiments, which will not be described here.

[0135] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article, or system. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article, or system including the element.

[0136] ​The above-mentioned embodiment numbers of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0137] Through the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be realized by means of software and the necessary general hardware platform, of course, they can also be realized by hardware, but in many cases the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory / random access memory, a magnetic disk, an optical disk), and includes a plurality of instructions for making a terminal device (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in various embodiments of the present application.

[0138] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent flow transformation made by using the content of the specification and drawings, or directly or indirectly applied to other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An audio / video data encryption system, characterized by, The system comprises a THz light source, a detection array panel, a signal processing device and an encryption processing device; The THz light source is configured to generate THz light based on a data encryption request; The detection array panel is configured to collect the THz light, convert the THz light into an analog electrical signal, and send the analog electrical signal to the signal processing device, wherein the detection array panel is formed by densely arranging a plurality of THz absorption films, THz condenser lenses and THz element detectors in pixel units according to a preset length-width ratio; The signal processing device is configured to convert the analog electrical signal into encrypted information and send the encrypted information to the encryption processing device; The encryption processing device is configured to encrypt to-be-encrypted audio and video metadata based on the encrypted information to obtain target audio and video metadata; The detection array panel comprises a two-dimensional code optical assembly and a photoelectric conversion detector; The two-dimensional code optical assembly is configured to collect the THz light and focus the THz light on the photoelectric conversion detector; The photoelectric conversion detector is configured to convert the focused THz light into an analog electrical signal and send the analog electrical signal to the signal processing device; The two-dimensional code optical assembly comprises an absorption film and a condenser lens; The absorption film is arranged on the condenser lens and configured to cover part of the condenser lens to shield the THz light; The condenser lens is configured to focus the THz light.

2. The system of claim 1, wherein, The photoelectric conversion detector comprises a detector module and a conversion module; The detector module is configured to form an electron flow by exciting internal carriers based on the focused THz light; The conversion module is configured to convert the electron flow into an analog electrical signal and send the analog electrical signal to the signal processing device.

3. The system of claim 1, wherein, The signal processing device comprises a signal acquisition module, a signal amplification module, a filtering module, a signal difference module and an analog-digital conversion module; The signal acquisition module is configured to acquire an analog electrical signal and send the analog electrical signal to the signal amplification module; The signal amplification module is configured to amplify the analog electrical signal and send the amplified analog electrical signal to the filtering module; The filtering module is configured to filter the amplified analog electrical signal and send the filtered analog electrical signal to the signal difference module; The signal difference module is configured to difference the filtered analog electrical signal and send the differentiated analog electrical signal to the analog-digital conversion module; The analog-digital conversion module is configured to perform analog-digital conversion on the differentiated analog electrical signal to generate encrypted information and send the encrypted information to the encryption processing device.

4. The system of claim 3, wherein, The signal amplification module comprises a multi-stage amplification submodule and a negative feedback module; The multi-stage amplification submodule is configured to amplify the analog electrical signal; The negative feedback module is configured to adjust the stability of the multi-stage amplification submodule through a negative feedback signal.

5. The system of claim 3, wherein, The analog-digital conversion module comprises a signal conversion submodule and a threshold comparison submodule; The signal conversion submodule is configured to perform analog-digital conversion on the differential analog electrical signal to generate a digital signal, and send the digital signal to the threshold comparison submodule. The threshold comparison submodule is configured to compare the digital signal with a preset threshold, generate encrypted information based on a threshold comparison result, and send the encrypted information to the encryption processing device.

6. The system of claim 1, wherein, The encryption processing device comprises a verification module and a storage module. The verification module is configured to verify the encrypted information, and encrypt to-be-encrypted audio-video metadata based on the encrypted information to generate target audio-video metadata after verification is passed. The storage module is configured to store the target audio-video metadata.

7. The system of claim 1, wherein, The THz light source comprises a controller and a point THz light source. The controller is configured to start the point THz light source when receiving the data encryption request. The point THz light source is configured to generate THz light.

8. An audio / video data encryption method, characterized by, The audio-video data encryption method is applied to an audio-video data encryption system, and the system comprises a THz light source, a detection array panel, a signal processing device, and an encryption processing device. The THz light source generates THz light based on a data encryption request. The detection array panel collects the THz light, converts the THz light into an analog electrical signal, and sends the analog electrical signal to the signal processing device. The signal processing device converts the analog electrical signal into encrypted information and sends the encrypted information to the encryption processing device. The encryption processing device encrypts to-be-encrypted audio-video metadata according to the encrypted information to obtain target audio-video metadata. The detection array panel comprises a two-dimensional code optical assembly and a photoelectric conversion detector. The two-dimensional code optical assembly collects the THz light and focuses the THz light to the photoelectric conversion detector. The photoelectric conversion detector converts the focused THz light into an analog electrical signal and sends the analog electrical signal to the signal processing device. The two-dimensional code optical assembly comprises an absorbing film and a condenser lens, the absorbing film is arranged on the condenser lens and is used for covering part of the condenser lens to shield the THz light, and the condenser lens is used for focusing the THz light.

Images