Preparation, encryption and decryption method of paper-based sensing device for communication encryption

Abstract

The invention relates to the technical field of communication encryption, and discloses a preparation, encryption and decryption method of a paper-based sensing device for communication encryption, and the preparation method comprises the following steps: dissolving metal halide perovskite in a solvent, and preparing a perovskite precursor solution; the method comprises the following steps: drawing an optical detection array electrode structure and an interconnection wire on cellulose filter paper, and synthesizing an optical response pixel region of an optical detection array; and adding the perovskite precursor solution to the cellulose filter paper with the optical detection array for treatment to obtain the paper-based sensing device. The problems that an existing detection array device preparation technology is complex in process and strict in requirement are solved, and the method has the advantage that the encryption effect of the device in a memory can be remarkably enhanced.

Description

Technical Field

[0001] The present invention relates to the field of communication encryption technology, and more specifically, to a method for preparing, encrypting and decrypting a paper-based sensor device for communication encryption. Background Art

[0002] In today's Internet of Things, image information is transmitted all the time. These large-scale, real-time communications often involve a lot of sensitive information in daily life, and these sensitive data often become the target of hackers' attacks. These encryption units used for encryption are physically separated from the sensor units and are easily attacked from the outside during the transmission process. The attacker's attack is usually cracked by known information and reliable computing power. With the development of machine learning and quantum computing today, machine learning can even be cracked directly by computing power, and the security of software algorithm cryptography has declined. Hardware cryptography has advantages over software cryptography due to its simple design and good randomness, but the hardware security module and the sensor module are physically isolated, and attackers can obtain security keys by disconnecting the physical connection. Therefore, highly reliable real-time encryption communication technology is needed to protect data.

[0003] Neuromorphic devices, as the hardware carrier for realizing neuromorphic computing, are the key to building neuromorphic chips. At the same time, the development of human visual system and optics has provided new ideas for the research of neuromorphic devices. Optoelectronic neuromorphic devices combine the advantages of photonics and electronics and have great potential in neuromorphic computing. Therefore, it is very necessary to provide a paper-based neuromorphic synaptic device for processing and encrypting information transmission.

[0004] The prior art has a neuromorphic visual sensor with encryption function, including a sensing and computing integrated module, which is used to perceive external visual images, and then use optical signals to perform pre-processing on the perceived images including encryption, decryption, destruction and denoising of the images to obtain pre-processed images; a translation, storage and computing integrated module, which is used to receive the pre-processed images, perform post-processing on the pre-processed images including encoding, recognition and classification of the images, and store weight factors used for image post-processing.

[0005] However, existing detection array devices rely on complex micro-nano processing technology, and have strict requirements on flexible substrates and a narrow selection range, resulting in high device costs and limiting the promotion of such flexible wearable devices. Therefore, how to design a stable and reliable method for preparing paper-based sensor devices is a technical problem that urgently needs to be solved in this technical field. Summary of the invention

[0006] In order to solve the problem that the existing detection array device preparation technology is complex and has strict requirements, the present invention provides a method for preparing, encrypting and decrypting a paper-based sensor device for communication encryption, which has the characteristic of being able to significantly enhance the encryption effect of the device in the memory.

[0007] In order to achieve the above-mentioned purpose of the present invention, the technical scheme adopted is as follows:

[0008] A method for preparing a paper-based sensor device for communication encryption comprises the following specific steps:

[0009] Dissolving metal halide perovskite in a solvent to prepare a perovskite precursor solution;

[0010] The photo-responsive pixel region of the photodetection array is synthesized by drawing the photodetection array electrode structure and interconnecting wires on cellulose filter paper;

[0011] The perovskite precursor solution is added to a cellulose filter paper with a light detection array to obtain a paper-based sensor device.

[0012] Preferably, the metal halide perovskite is dissolved in a solvent to prepare a perovskite precursor solution, and the specific steps are:

[0013] Dissolving a metal halide perovskite solid raw material in a dimethyl sulfoxide solvent according to a set amount ratio;

[0014] The solution is heated and stirred within a set time; the stirred solution is filtered to complete the preparation of the perovskite precursor solution.

[0015] Furthermore, by drawing the light detection array electrode structure and interconnecting wires on the cellulose filter paper, the light response pixel area of ​​the light detection array is synthesized, and the specific steps are as follows:

[0016] Take cellulose filter paper and cut it into required specifications and shapes;

[0017] Drawing the photodetection array electrode structure and interconnecting wires on paper using conductive ink;

[0018] The mapped electrode array is defined as the photoresponsive pixel region of the photodetection array.

[0019] Furthermore, the conductive ink is printed by a pencil or an inkjet printer; and the two ends of the light detection array electrode structure are arranged on the same side of the paper substrate or on two sides of the paper substrate.

[0020] Furthermore, the perovskite precursor solution is added to a cellulose filter paper with a light detection array to obtain a paper-based sensor device. The specific steps are as follows:

[0021] A perovskite precursor solution is taken by a pipette and dripped onto a filter paper to form a photoresponsive pixel area or a perovskite precursor solution is printed onto the filter paper by an inkjet printer to produce a photoresponsive array with a certain size.

[0022] The photoresponse array is heated and annealed at a set temperature to obtain a paper-based sensor device.

[0023] A paper-based sensor device encryption method, based on the paper-based sensor device, includes the following specific steps:

[0024] Quantify the range of conductance states;

[0025] Determine the plaintext that needs to be encrypted;

[0026] The plaintext is encoded and stored in the memristor array and mapped to the conductance sequence;

[0027] Applying a number of random pulses to the paper-based sensor device based on the conductance sequence and the conductance state range to generate a public key;

[0028] Combine the public key and plaintext to generate ciphertext and private key.

[0029] Preferably, the conductance state range is quantified, and the specific steps are:

[0030] Apply n ultraviolet light pulses to the paper-based sensor device in sequence until the device current stops increasing, and record the conductivity state information corresponding to each ultraviolet light pulse;

[0031] Applying n additional ultraviolet light pulses to the paper-based sensor device in sequence, and recording the conductivity state information corresponding to each ultraviolet light pulse;

[0032] The combination results in a conductivity state range with 2n quantized conductivity state information.

[0033] Furthermore, the plaintext is encoded and stored in the memristor array and mapped to the conductance sequence. The specific steps are as follows:

[0034] Use several multi-bit binary numbers to represent each letter of the plaintext;

[0035] All binary digits are converted by coding and stored in a memristor array as several binary groups;

[0036] Mapping each binary group to a conductivity signal to obtain a number of conductivity signals;

[0037] The conductances are sorted to form a conductance sequence.

[0038] Furthermore, the public key and plaintext are combined to generate ciphertext and private key, which is specifically expressed as:

[0039] Combine the public key and plaintext to generate ciphertext:

[0040]

[0041] Among them, x1 is plain text, x2 is the public key;

[0042] Further generate the private key g(x):

[0043]

[0044] A decryption method for a paper-based sensor device, based on the encryption method, includes the following specific steps:

[0045] Applying a pulse stimulus corresponding to the conductance sequence of the private key to the paper-based sensor device to obtain a decrypted conductance sequence output by the paper-based sensor device;

[0046] The decrypted conductance sequence is mapped back to the corresponding binary number, and the binary number is converted back to words and combined to obtain the plaintext.

[0047] The beneficial effects of the present invention are as follows:

[0048] The present invention discloses a method for preparing a paper-based sensor device for communication encryption. Cellulose filter paper is used as a substrate. A semiconductor perovskite synaptic light-responsive pixel region is synthesized in situ on the filter paper substrate, and a corresponding electrode structure and coupling wires are constructed to prepare a highly flexible perovskite paper light detection array device. Thus, the present invention reliably and stably prepares a paper-based flexible perovskite photodetector array with high bending stability for the first time, providing a strategy for encryption using public and private keys derived from the self-oscillating synaptic behavior of the device, and the asymmetric nature of the strategy can significantly enhance the efficacy of encryption in memory. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a schematic flow chart of a method for preparing a paper-based sensor device for communication encryption according to the present invention.

[0050] Figure 2 Schematic diagram of the preparation of a single perovskite quantum dot / paper composite device.

[0051] Figure 3 It is a schematic diagram of the test results of the photoelectric response characteristics of the perovskite quantum dot / paper composite flexible light detection array at different frequencies using the present invention.

[0052] Figure 4 This is a schematic diagram of the PPF characteristics of the perovskite quantum dot / paper composite flexible synaptic photodetection device simulated within 1 second.

[0053] Figure 5 This is a schematic diagram of the PPF characteristics of the perovskite quantum dot / paper composite flexible synaptic photodetection device simulated within 0.5 seconds.

[0054] Figure 6 This is a schematic diagram of the PPF characteristics of the perovskite quantum dot / paper composite flexible synaptic photodetection device simulated within 0.18 seconds.

[0055] Figure 7 It is a schematic flow chart of the encryption method of the paper-based sensor device of the present invention.

[0056] Figure 8 This is a schematic diagram of 4×4 perovskite quantum dot array encryption and decryption

[0057] Fig. 9 It is a schematic flow chart of the decryption method of the paper-based sensor device of the present invention. DETAILED DESCRIPTION

[0058] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0059] Example 1

[0060] like Figure 1 As shown, a method for preparing a paper-based sensor device for communication encryption includes the following specific steps:

[0061] Dissolving metal halide perovskite in a solvent to prepare a perovskite precursor solution;

[0062] The photo-responsive pixel region of the photodetection array is synthesized by drawing the photodetection array electrode structure and interconnecting wires on cellulose filter paper;

[0063] The perovskite precursor solution is added to a cellulose filter paper with a light detection array to obtain a paper-based sensor device.

[0064] In a specific embodiment, the metal halide perovskite is dissolved in a solvent to prepare a perovskite precursor solution, and the specific steps are:

[0065] MaBr and PbBr2 metal halide perovskite solid raw materials are dissolved in dimethyl sulfoxide solvent at a molar ratio of 1:1, with a concentration of 0-1 mol / L;

[0066] The mixture was heated and stirred at 45° C. for 4 hours, and the stirred solution was filtered to complete the preparation of the perovskite precursor solution.

[0067] In a specific embodiment, the light detection array electrode structure and interconnecting wires are drawn on cellulose filter paper to synthesize the light response pixel area of ​​the light detection array, and the specific steps are as follows:

[0068] Take cellulose filter paper and cut it into 1cm*2cm strips;

[0069] Drawing the photodetection array electrode structure and interconnecting wires on paper using conductive ink;

[0070] The mapped electrode array is defined as the photoresponsive pixel region of the photodetection array.

[0071] In a specific embodiment, the conductive ink is printed by a pencil or an inkjet printer; and the two ends of the light detection array electrode structure are arranged on the same side of the paper substrate or on two sides of the paper substrate.

[0072] In a specific embodiment, the perovskite precursor solution is added to a cellulose filter paper having a light detection array to obtain a paper-based sensor device, and the specific steps are as follows:

[0073] A perovskite precursor solution is taken by a pipette and dripped onto a filter paper to form a photoresponsive pixel area or a perovskite precursor solution is printed onto the filter paper by an inkjet printer to produce a photoresponsive array with a certain size.

[0074] The photoresponse array was heated and annealed at 100° C. for 10 minutes to obtain a paper-based sensor device.

[0075] Example 2

[0076] More specifically, in this embodiment, the metal halide perovskite is dissolved in a solvent to prepare a perovskite precursor solution, and the specific steps are:

[0077] Dissolve in dimethyl sulfoxide solvent according to the molar ratio of 1:1; dissolve CsBr and PbBr2 solid raw materials in dimethyl sulfoxide solvent at a concentration of 0-1 mol / L;

[0078] Stir and heat at 45° C. for 2 hours, filter the stirred solution, and complete the preparation of the perovskite precursor solution.

[0079] like Figure 2 As shown, in a specific embodiment, by drawing the light detection array electrode structure and interconnecting wires on cellulose filter paper, the light response pixel area of ​​the light detection array is synthesized, and the specific steps are:

[0080] Take cellulose filter paper and cut it into 2cm*2cm blocks;

[0081] Drawing the photodetection array electrode structure and interconnecting wires on paper using conductive ink;

[0082] The mapped electrode array is defined as the photoresponsive pixel region of the photodetection array.

[0083] In a specific embodiment, the conductive ink is printed by a pencil or an inkjet printer; and the two ends of the light detection array electrode structure are arranged on the same side of the paper substrate or on two sides of the paper substrate.

[0084] In a specific embodiment, the perovskite precursor solution is added to a cellulose filter paper having a light detection array to obtain a paper-based sensor device, and the specific steps are as follows:

[0085] A perovskite precursor solution is taken by a pipette and dripped onto a filter paper to form a photoresponsive pixel area or a perovskite precursor solution is printed onto the filter paper by an inkjet printer to produce a photoresponsive array with a certain size.

[0086] The photoresponse array was heated and annealed at 100° C. for 10 minutes to obtain a paper-based sensor device.

[0087] In this embodiment, Figure 3 After heating and annealing, the perovskite precursor adheres to the fiber of the filter paper and crystallizes and grows into quantum dots. These quantum dots are sufficiently stable under the protection of cellulose. Under ultraviolet light, the composite material will emit bright green fluorescence (due to the perovskite precursor composition used), and at the same time show obvious photoconductivity effect. In this way, a flexible perovskite light detection array with image sensing capability is obtained. A certain bias voltage is applied to both ends of the electrode of each pixel, and obvious photocurrent can be detected under certain light.

[0088] In this embodiment, Figure 4 , Figure 5 , Figure 6 As shown in the figure, the paper-based sensor device used for communication encryption has self-oscillating synaptic performance, which can respond quickly and effectively and focus on a specific state after receiving pulse stimulation. That is to say, when a pulse signal is applied, the response of the material can accurately reach the preset conductivity state or other physical properties.

[0089] This paper-based sensor device uses cellulose paper as a flexible substrate. By in-situ synthesizing perovskite quantum dots on the substrate, a paper-based flexible perovskite photodetector array with high bending stability is prepared.

[0090] In this embodiment, the designed light detection array is illuminated under a certain bias voltage, proving that the light detection array device has obvious light response characteristics. At the same time, its dark current and photocurrent show good stability in the bending cycle, and the flexible device has reliable image sensing performance. The substrate selected by the present invention is cellulose paper with high flexibility. The cellulose in the paper plays a key role in the in-situ synthesis of perovskite quantum dots and the stabilization of perovskite quantum dots. The paper fiber provides loading sites and passivation ligands for the perovskite quantum dots, making it difficult for the light detection array device to cause quantum dots to fall off and the device to fail during bending. And the light detection array device provides a strategy for encryption using public and private keys derived from the self-oscillating synaptic behavior of the device. The asymmetric nature of this strategy can significantly enhance the efficacy of encryption in memory.

[0091] In summary, the prepared perovskite quantum dot / paper device exhibits obvious light detection characteristics, the perovskite quantum dots have good contact, and there is a good current transmission channel. The prepared electrode forms a good ohmic contact with the perovskite quantum dot active material, indicating that the perovskite quantum dots synthesized in situ on the cellulose paper substrate have obvious semiconductor photoconductivity. At the same time, the method of pencil-drawn graphite electrodes and interconnects has high reliability. Each pixel can be addressed independently, which can be further expanded to flexible image sensor devices with larger areas and higher pixel densities. And the self-oscillation behavior of the device can derive public and private keys, which improves the encryption effect in memory.

[0092] Through the above examples and analysis, it can be concluded that the present invention prepares a paper-based sensor with a perovskite quantum dot / paper flexible light detection array. A regular conclusion with scientific guiding significance is obtained, which has important guiding significance for the selection of device materials and structural design in this field. The flexible light detection array has excellent light detection performance and image sensing performance. Compared with traditional image sensor devices, the present invention not only has obvious advantages in bending stability, but also has the characteristics of simplicity, low cost and scalability in its preparation method. Compared with the symmetric operation that relies on the same key to encrypt and decrypt data, the present invention utilizes the public key and private key derived from the self-oscillating synaptic behavior of the device. The asymmetric nature of this strategy significantly enhances the efficacy of encryption in memory. It provides a new route for the preparation of flexible light image sensing encryption devices.

[0093] Example 3

[0094] like Figure 7 As shown, an encryption method for a paper-based sensor device, based on the paper-based sensor device, includes the following specific steps:

[0095] Quantify the range of conductance states;

[0096] Determine the plaintext that needs to be encrypted;

[0097] The plaintext is encoded and stored in the memristor array and mapped to the conductance sequence;

[0098] Applying a number of random pulses to the paper-based sensor device based on the conductance sequence and the conductance state range to generate a public key;

[0099] Combine the public key and plaintext to generate ciphertext and private key.

[0100] In a specific embodiment, the conductance state range is quantified by:

[0101] 21 ultraviolet light pulses with a length of 365nm, an amplitude of 3V, a width of 0.1s, and an interval of 0.2s were applied to the paper-based sensor device in sequence. The device current increased from 8.35nA to 9.65nA, and the conductivity state information corresponding to each ultraviolet light pulse was recorded.

[0102] 21 additional UV light pulses with a length of 365 nm, an amplitude of 3 V, a width of 0.1 s, and an interval of 0.2 s were applied to the paper-based sensor device in sequence, and the device current decreased from 9.65 nA to 8.35 nA. The conductivity state information corresponding to each UV light pulse was recorded.

[0103] The combination results in a conductivity state range with 42 quantized conductivity state information.

[0104] In a specific embodiment, Figure 8 As shown, the plaintext is encoded and stored in the memristor array and mapped to the conductance sequence. The specific steps are:

[0105] The encrypted “Encryption” uses a meticulous encoding process to convert each letter into its corresponding 8-bit binary representation: “0100 0101”, “0110 1110”, “0110 0011”, “0111 0010”, “0111 1001”, “0111 0000”, “0111 0100”, “0110 1001”, “0110 1111” and “0110 1110”;

[0106] The 80 binary digits are stored in a 4×4 array using a 5-bit binary transmission scheme, and their conductance sequences are represented as “08”, “21”, “23”, “06”, “06”, “28”, “19”, “25”, “14”, “01”, “26”, “06”, “18”, “27”, “27”, “14”;

[0107] The conductances are sorted to form a conductance sequence.

[0108] In a specific embodiment, the ciphertext and private key are generated by combining the public key and the plaintext, which is specifically expressed as follows:

[0109] Combine the public key and plaintext to generate ciphertext:

[0110]

[0111] Among them, x1 is plain text, x2 is the public key;

[0112] Further generate the private key g(x):

[0113]

[0114] In this embodiment, the generated public key is specifically a conductance sequence including "08", "21", "23", "06", "06", "28", "19", "25", "14", "01", "26", "06", "18", "27", "27", "14", and the generated ciphertext is specifically a conductance sequence including "10", "17", "14", "20", "06", "13", "1", "06", "15", "13", "12", "06", "12", "13", "15", "17". The generated private key is specifically a conductance sequence including "26", "3", "5", "16", "0", "2", "16", "11", "1", "28", "4", "0", "12", "2", "0", "11".

[0115] Example 4

[0116] like Fig. 9 As shown, a decryption method of a paper-based sensor device, based on the encryption method, includes the following specific steps:

[0117] Applying a pulse stimulus corresponding to the conductance sequence of the private key to the paper-based sensor device to obtain a decrypted conductance sequence output by the paper-based sensor device;

[0118] Map the decrypted conductance sequence back to the corresponding binary number, convert the binary number back to words and combine them to get the plaintext of "Encryption".

[0119] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A method for preparing a paper-based sensor device for communication encryption, characterized in that: The specific steps include: Dissolving metal halide perovskite in a solvent to prepare a perovskite precursor solution; The photo-responsive pixel region of the photodetection array is synthesized by drawing the photodetection array electrode structure and interconnecting wires on cellulose filter paper; The perovskite precursor solution is added to a cellulose filter paper with a light detection array to obtain a paper-based sensor device.

2. The method for preparing a paper-based sensor device for communication encryption according to claim 1, characterized in that: Dissolve the metal halide perovskite in a solvent to prepare a perovskite precursor solution. The specific steps are: Dissolving a metal halide perovskite solid raw material in a dimethyl sulfoxide solvent according to a set amount ratio; The solution is heated and stirred within a set time; the stirred solution is filtered to complete the preparation of the perovskite precursor solution.

3. The method for preparing a paper-based sensor device for communication encryption according to claim 1, characterized in that: The photodetection array electrode structure and interconnecting wires are drawn on cellulose filter paper to synthesize the photoresponse pixel area of ​​the photodetection array. The specific steps are as follows: Take cellulose filter paper and cut it into required specifications and shapes; Drawing the photodetection array electrode structure and interconnecting wires on paper using conductive ink; The mapped electrode array is defined as the photoresponsive pixel region of the photodetection array.

4. The method for preparing a paper-based sensor device for communication encryption according to claim 3, characterized in that: The conductive ink is printed by a pencil or an inkjet printer; the two ends of the light detection array electrode structure are arranged on the same side of the paper substrate or on the two sides of the paper substrate respectively.

5. The method for preparing a paper-based sensor device for communication encryption according to claim 3, characterized in that: The perovskite precursor solution is added to the cellulose filter paper with the light detection array to obtain a paper-based sensor device. The specific steps are as follows: A perovskite precursor solution is taken by a pipette and dripped onto a filter paper to form a photoresponsive pixel area or a perovskite precursor solution is printed onto the filter paper by an inkjet printer to produce a photoresponsive array with a certain size. The photoresponse array is heated and annealed at a set temperature to obtain a paper-based sensor device.

6. A paper-based sensor device encryption method, characterized in that: The paper-based sensor device according to any one of claims 1 to 5 comprises the following specific steps: Quantify the range of conductance states; Determine the plaintext that needs to be encrypted; The plaintext is encoded and stored in the memristor array and mapped to the conductance sequence; Applying a number of random pulses to the paper-based sensor device based on the conductance sequence and the conductance state range to generate a public key; Combine the public key and plaintext to generate ciphertext and private key.

7. The encryption method of a paper-based sensor device according to claim 7, characterized in that: Quantify the range of conductivity states. The specific steps are: Apply n ultraviolet light pulses to the paper-based sensor device in sequence until the device current stops increasing, and record the conductivity state information corresponding to each ultraviolet light pulse; Applying n additional ultraviolet light pulses to the paper-based sensor device in sequence, and recording the conductivity state information corresponding to each ultraviolet light pulse; The combination results in a conductivity state range with 2n quantized conductivity state information.

8. The encryption method of a paper-based sensor device according to claim 7, characterized in that: The plaintext is encoded and stored in the memristor array and mapped to the conductance sequence. The specific steps are: Use several multi-bit binary numbers to represent each letter of the plaintext; All binary digits are converted by coding and stored in a memristor array as several binary groups; Mapping each binary group to a conductivity signal to obtain a number of conductivity signals; The conductances are sorted to form a conductance sequence.

9. The encryption method of a paper-based sensor device according to claim 8, characterized in that: Combining the public key and plaintext to generate ciphertext and private key is specifically expressed as: Combine the public key and plaintext to generate ciphertext: Among them, x1 is plain text, x2 is the public key; Further generate the private key g(x):

10. A decryption method for a paper-based sensor device, characterized in that: Based on the encryption method according to any one of claims 6 to 9, the method comprises the following specific steps: Applying a pulse stimulus corresponding to the conductance sequence of the private key to the paper-based sensor device to obtain a decrypted conductance sequence output by the paper-based sensor device; The decrypted conductance sequence is mapped back to the corresponding binary number, and the binary number is converted back to words and combined to obtain the plaintext.

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