High-dimensional data encryption method based on dynamic cross-linking polymer

Abstract

Disclosed is a high-dimensional data encryption method based on a dynamically cross-linked polymer. In the method, an encryption party provides a dynamically cross-linked polymer as a material key and a carrier for data encryption; a random single mapping relationship between the RGB value of a birefringence color and the encrypted data is established as a codebook; the encrypted data is compiled into a reproducible birefringence color sequence based on the random single mapping relationship, and a key is generated based on a response model of the birefringence color of the dynamically cross-linked polymer; and the carrier is decrypted based on the key to obtain the birefringence color containing the encrypted information.

Description

Technical Field

[0001] The present invention relates to the field of encrypted communication technology, and in particular to a high-dimensional data encryption method based on a dynamic cross-linked polymer. Background Art

[0002] Existing optical encryption methods primarily rely on computer-based image and pattern encryption, achieving encryption by applying a wrapping function to the grayscale and RGB values ​​of pixels. The encrypted, unordered image is then decrypted by applying an unwrapping operation. Due to the increasing penetration of network eavesdroppers and hackers, these communication methods pose a risk of being cracked as their use becomes more frequent. Furthermore, most of these traditional encrypted communication methods rely heavily on computers, making decryption difficult in unexpected situations (such as power outages and computer failures). This can lead to the loss of critical, time-sensitive keys.

[0003] Exploiting the network topology rearrangement properties of dynamically cross-linked polymers promises to bring new solutions to data encryption. However, current approaches to optical encryption using the dynamic properties of dynamically cross-linked polymers focus on recording encrypted patterns through external stimulation of the dynamic network. However, the decryption process fails to utilize the dynamic properties of the dynamic network, resulting in a simplistic decryption process and the risk of data loss.

[0004] The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the Invention

[0005] To address the shortcomings of the existing technology, the present invention aims to provide a high-dimensional data encryption method based on dynamically cross-linked polymers, enabling enhanced security in spatiotemporal encrypted communication. Under polarized light, dynamically cross-linked polymers undergo birefringence. Birefringence, a macroscopic optical manifestation of birefringence, can be used to transmit encrypted information through color signals. This method leverages the dynamic optical response of dynamically cross-linked polymers to achieve dynamic decryption, ultimately achieving optical high-dimensional encryption by manipulating the decryption conditions.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A high-dimensional data encryption method based on a dynamically cross-linked polymer of the present invention comprises:

[0008] The encryption party provides a dynamic cross-linked polymer as the material key and carrier of data encryption;

[0009] Establish a random single mapping relationship between the RGB value of the birefringence color and the encrypted data as the code book;

[0010] The encrypted data is compiled into a reproducible birefringence color sequence according to a random single mapping relationship, and a key is generated according to a response model of the birefringence color of the dynamic cross-linked polymer;

[0011] The carrier is decrypted according to the key to obtain the birefringence color containing the encrypted information.

[0012] In the method described above, the RGB value of the birefringence color is the transmitted password information.

[0013] In the method described, the random single mapping relationship is a number-color mapping.

[0014] In the method, the keys include temperature-based keys, mechanical keys, and time sequence keys.

[0015] In the method, the key is a dynamically cross-linked polymer material, the temperature key is the ambient temperature during dynamic decryption, the mechanical key is the strain rate during dynamic decryption, and the time sequence key is the birefringence color extraction time during dynamic decryption.

[0016] In the method described, the response model of the birefringence color of the dynamic cross-linked polymer is: (1),

[0017] The optical coefficient C and initial cross-linking density N of the material in the model are obtained from the rapid tensile test of the material, respectively;

[0018] (2),

[0019] The slopes of N, C, and K are obtained by linear fitting formulas (2) and (1). B is the Boltzmann constant; T is the ambient temperature, Δn represents the optical birefringence value of the material; λ is the stretch ratio of the material, and S(λ,T) refers to the nominal stress of the material under the conditions of stretch ratio λ and ambient temperature T.

[0020] In the method, the material key includes the catalyst content of the carrier.

[0021] In the method, the dynamic cross-linked polymer is formed into a dynamic cross-linked network structure by introducing dynamic chemical bonds into a permanent cross-linked polymer network.

[0022] In the method described above, the key is composed of 3i+6 digits, which are the decryption loading rate, the ambient temperature T and the time key t1t2t3...t i .

[0023] In the method described, bits 1 to 3 of the key are a mechanical key that is 1000 times the loading rate v. If the number is less than 3, it is padded with 0s. Bits 4 to 6 of the key are a temperature key representing the decrypted Kelvin temperature. Starting from the 7th bit, every 3 digits of the key correspond to a birefringence color decryption time t. i (i=1,2,3,...), if a single moment is less than 3 digits, it will be padded with 0. Beneficial effects

[0024] The present invention dynamically decrypts dynamically cross-linked polymers based on a key, achieving data encryption in both time and space dimensions. The encrypted information can be stored, sent, or preserved across time and space using a material key. The decryption process utilizes the dynamic optical response of the dynamically cross-linked polymer to achieve dynamic decryption. Material keys, mechanical keys, and temperature keys are introduced into the encryption process, while time series keys are introduced into the dynamic decryption process. These conditions create a barrier to decryption of the encrypted information. The present invention fully utilizes the dynamic nature of the cross-linked network during decryption, controlling the dynamic optical response from multiple dimensions, such as temperature, strain rate, and material composition, thereby transmitting encrypted information through dynamic optical color changes.

[0025] The above description is only an overview of the technical solution of the present invention. In order to make the technical means of the present invention clearer and easier to understand, so that those skilled in the art can implement it according to the contents of the specification, and to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described below by way of example. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0027] Various other advantages and benefits of the present invention will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are intended only to illustrate preferred embodiments and are not to be construed as limiting the present invention. It should be understood that the drawings described below are merely examples of the present invention, and that those skilled in the art will be able to derive other drawings from these drawings without inventive effort. Throughout the drawings, identical reference numerals are used to denote identical components.

[0028] In the attached figure:

[0029] Figure 1This is a schematic diagram of a cross-linking network in a polymer according to a high-dimensional data encryption method based on a dynamic cross-linking polymer provided by one embodiment of the present disclosure;

[0030] Figure 2 This is a schematic diagram of chromatographic collection of a carrier material at different stretching ratios according to a high-dimensional data encryption method based on a dynamic cross-linked polymer provided by one embodiment of the present disclosure;

[0031] Figure 3 This is a key diagram of a high-dimensional data encryption method based on a dynamic cross-linked polymer provided by an embodiment of the present disclosure;

[0032] Figure 4 This is a schematic diagram of the decryption process of a high-dimensional data encryption method based on a dynamic cross-linked polymer provided by an embodiment of the present disclosure.

[0033] The present invention will be further explained below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0039] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0041] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings, and the accompanying drawings do not constitute a limitation on the embodiments of the present invention.

[0042] In one embodiment, if Figures 1 to 4 As shown, the present disclosure provides a data high-dimensional encryption method based on a dynamic cross-linked polymer, comprising the following steps:

[0043] The encryption party provides a dynamic cross-linked polymer as the material key and carrier of data encryption;

[0044] Establish a random single mapping relationship between the RGB value of the birefringence color and the encrypted data as the code book;

[0045] The encrypted data is compiled into a reproducible birefringence color sequence according to a random single mapping relationship, and a key is generated according to a response model of the birefringence color of the dynamic cross-linked polymer;

[0046] The carrier is decrypted according to the key to obtain the birefringence color containing the encrypted information.

[0047] In a preferred embodiment of the method, the RGB value of the birefringence color is the transmitted password information.

[0048] In a preferred embodiment of the method, the random single mapping relationship is a number-color mapping.

[0049] In a preferred embodiment of the method, the keys include temperature-based keys, mechanical keys, and time sequence keys.

[0050] In a preferred embodiment of the method, the key is a dynamically cross-linked polymer material, the temperature key is the ambient temperature during dynamic decryption, the mechanical key is the strain rate during dynamic decryption, and the moment sequence key is the birefringence color extraction moment during dynamic decryption.

[0051] In a preferred embodiment of the method, the response model of the birefringence color of the dynamic cross-linked polymer is (1),

[0052] The optical coefficient C and initial cross-linking density N of the material in the model are obtained from the rapid tensile test of the material, respectively;

[0053] (2),

[0054] The slopes of N, C, and K are obtained by linear fitting formulas (2) and (1). B is the Boltzmann constant; T is the ambient temperature, Δn represents the optical birefringence value of the material; λ is the stretch ratio of the material, S(λ,T) refers to the nominal stress of the material under the conditions of stretch ratio λ and ambient temperature T; λ= is defined as the stretched length of the material / initial length, which can be expressed as: 1+v*t, where v is the loading strain rate; t is the stretching time.

[0055] In a preferred embodiment of the method, the material key includes the catalyst content of the support.

[0056] In one embodiment, the method comprises the following steps:

[0057] Providing a dynamically cross-linked polymer having a dynamically cross-linked network structure as a material key and measuring the glass transition temperature of the carrier;

[0058] Obtaining and recording a birefringence ribbon on the carrier, wherein the birefringence ribbon is obtained by performing uniaxial tensile tests at different strain rates at different ambient temperatures T, wherein the ambient temperature T is not lower than the glass transition temperature;

[0059] According to the requirements of encrypted communication, the birefringence color containing the encrypted information that needs to be reproduced is determined, and a key is generated based on the birefringence color. The key includes the decryption loading rate based on the birefringence color, the ambient temperature T, and different decryption times t i (i=1,2,3,…), where the decryption loading rate represents the tensile strain rate applied to the carrier during decryption, the ambient temperature T and different decryption times t i (i=1,2,3,……) is the specific decryption condition.

[0060] The carrier is decrypted according to the key to obtain the birefringence color containing the encrypted information.

[0061] In a preferred embodiment of the method, the RGB value of the birefringence color is a single mapping of the transmitted cryptographic information.

[0062] In a preferred embodiment of the method, the dynamically cross-linked polymer is formed into a dynamic cross-linked network structure by introducing dynamic chemical bonds into a permanent cross-linked polymer network.

[0063] In a preferred embodiment of the method, a chromatographic recording system is used to collect birefringence colors of the carrier under different stresses at different ambient temperatures and different stretching times, using different colors of basic light of the carrier.

[0064] In a preferred embodiment of the method, the chromatogram recording system includes a light source part, a polarizer, a heating system for adjusting the temperature of the carrier, and an analyzer.

[0065] In the preferred embodiment of the method, the key is composed of 3i+6 (i is the number of password bits) digits, which are the decryption loading rate, the ambient temperature T and different decryption times t i (i=1,2,3,...), the 1st to 3rd digits of the key are used for decryption. The loading rate is a 3-digit number, which is 1000 times the loading rate. If it is less than 3 digits, it will be padded with 0. For example: the loading strain rate is 0.01s -1 , then the corresponding position in the key is 010; the 4th to 6th digits of the key are the ambient temperature T, which is a three-digit number that records the ambient Kelvin temperature. For example, when the temperature is 150℃ (423K), the corresponding position of the key is 423; starting from the 7th digit, every 3 digits of the key corresponds to a birefringence color decryption time t i(i=1,2,3,...), if a single time is less than 3 digits, it is padded with 0. For example, if the key starts from the 7th digit and is 050101203..., it means that the first decryption time is 50 seconds after loading, the second decryption time is 101 seconds, and the third decryption time is 203 seconds after loading...

[0066] In a preferred embodiment of the method, the network components of the carrier lead to different responses of birefringence colors under the same action conditions, and the key includes the catalyst content of the carrier.

[0067] In a preferred embodiment of the method, the corresponding birefringence colors are obtained by adjusting the ambient temperature, stretching time, strain rate of the carrier and / or network composition of the carrier to form the cryptographic library.

[0068] In one embodiment, the method includes,

[0069] Preparation of reusable carriers, such as Figure 1 As shown, cross-linked polymers are a type of dynamically cross-linked polymer with a three-dimensional cross-linked network structure. This cross-linked network maintains the polymer's dimensional stability and imparts high-temperature resistance, electrical insulation, high strength, and high stiffness. Epoxy-based polymers containing dynamic bonds are a new type of dynamically cross-linked polymer with a wide range of applications and reusability. Dynamic cross-linked networks are created by introducing dynamic chemical bonds (DCBs) into permanently cross-linked polymer networks (PCNs). Due to the presence of dynamic chemical bonds, the polymer chains within the dynamic cross-linked network can undergo bond exchange reactions under specific environmental stimuli (such as light or heat). The dissociation and reconnection of dynamic bonds causes topological rearrangements in the polymer network, exhibiting macroscopic properties of stress relaxation and viscoelasticity. The introduction of dynamic chemical bonds preserves the inherent stability of the three-dimensional cross-linked network while also enabling recyclability, reshaping, and self-healing.

[0070] The glass transition temperature (GTT) is a critical physical quantity for color carrier materials. At room temperature, the carrier material has physical properties similar to those of epoxy resin. However, when the ambient temperature is close to or above the GTT, the bond exchange reaction in the material is activated, and the mechanical behavior of the material becomes temperature-dependent.

[0071] Before conducting the experiment, the experimental conditions must be determined first. Different stretching ratios and different temperatures will lead to different final birefringence colors. Due to different experimental methods, the acquisition of color spectrum can be divided into stretching experiments. The theoretical formula for stretching experiments is as follows:

[0072] (2)

[0073] Where N is the initial crosslinking density of the material; K B is the Boltzmann constant; T is the experimental ambient temperature. The values ​​on the left side of the equation represent the nominal stress values ​​of the material at different temperatures and stretch ratios. For the carrier material, the relationship between birefringence and stress is as follows:

[0074] (3)

[0075] In formula (3), C is the optical constant of the carrier material, which has little correlation with temperature and can be measured experimentally. Therefore, the expected birefringence color can be obtained by measuring the stress value during the tensile test. Figure 4 Shown is 180°C, strain rate 10 -3 (s 1 ). In this case, the dimensions of the carrier material are: 60 mm × 10 mm × 2 mm (length × width × thickness).

[0076] (4)

[0077] Formula (4) reflects the relationship between the light intensity of the carrier material and its birefringence recorded at the decryption moment during the stretching process. is the average light intensity of the image, d is the thickness of the material, is the wavelength of the light wave in the light field, and Δn is the optical birefringence value of the material.

[0078] In summary, by setting different ambient temperatures and different stretching times to record the birefringence color of the carrier material at that moment, as the number of sampling points increases, the chromatograms of the carrier material under different conditions are collected.

[0079] like Figure 3 As shown, in addition to the preparation of the carrier material and the collection of the chromatogram, the most critical factor in encrypted communication is the generation of the key. The key is composed of 3i+6 digits (i is the number of cipher bits). In this method, the key is divided into three parts, namely the decryption loading rate, the ambient temperature T, and different decryption times t. i (i=1,2,3,...), the 1st to 3rd digits of the key are used for decryption. The loading rate is a 3-digit number, which is 1000 times the loading rate. If it is less than 3 digits, it will be padded with 0. For example: the loading strain rate is 0.01s -1 , then the corresponding position in the key is 010; the 4th to 6th digits of the key are the ambient temperature T, which is a three-digit number that records the ambient Kelvin temperature. For example, when the temperature is 150℃ (423K), the corresponding position of the key is 423; starting from the 7th digit, every 3 digits of the key corresponds to a birefringence color decryption time t i(i=1,2,3,...), if a single time is less than 3 digits, it is padded with 0. For example, if the key starts from the 7th digit and is 050101203..., it means that the first decryption time is 50 seconds after loading, the second decryption time is 101 seconds, and the third decryption time is 203 seconds after loading...

[0080] like Figure 4 As shown, in the decryption step, the encrypted transmission terminal decrypts the carrier material in response to the action conditions based on the obtained key, obtaining the birefringence color containing the encrypted information. The final birefringence color sequence is translated into the required data based on the code book.

[0081] In one embodiment, data encryption is achieved by translating the temporal response of the birefringence color of a dynamically cross-linked polymer into birefringence colors under specific conditions. During encryption, first, the user selects a dynamically cross-linked polymer system based on their needs, which serves as the material key. Users can choose a single material unit for single-channel information encryption, or select different material units to create a multi-channel encryption channel material in an integrated manner. Second, a random, single mapping relationship (number-color mapping) is established between the RGB values ​​of the birefringence color and the encrypted data, serving as the codebook. Third, a temperature key and a mechanical key (the uniaxial stretching rate of the material) are set, and the data is translated into a specific color sequence under these conditions according to the codebook. Fourth, based on the birefringence color response model of the dynamically cross-linked polymer, the color sequence is converted into a time sequence, serving as the time key. During decryption, the user uniaxially stretches the material key according to the temperature key and mechanical key provided by the encryption provider, extracting the birefringence color sequence based on the time key to complete optical information acquisition. Finally, the color sequence is decrypted into the target data using the codebook.

[0082] In one embodiment, the method includes,

[0083] Providing a dynamically cross-linked polymer having a dynamically cross-linked network structure as a material key and measuring the glass transition temperature of the material;

[0084] Based on the dynamic chain evolution model of dynamically cross-linked polymers and combined with the optical Lorentz formula, a dynamic birefringence color evolution model is established. A random single mapping relationship (number-color mapping) between the RGB values ​​of the birefringence color and the encrypted data is established, which is the codebook.

[0085] Obtaining and recording a birefringence ribbon on the carrier, wherein the birefringence ribbon is obtained by performing a uniaxial tensile test at different strain rates at an ambient temperature T, wherein the ambient temperature T is not lower than the glass transition temperature;

[0086] Based on the requirements of encrypted communication, the birefringence color containing the encrypted information that needs to be reproduced is determined, and a key is generated based on the encryption requirements. The key includes a temperature key, a mechanical key, and a time sequence key. The RGB value of the birefringence color is a single mapping of the transmitted cryptographic information.

[0087] In the method, the dynamic cross-linked polymer is formed into a dynamic cross-linked network structure by introducing dynamic chemical bonds into a permanent cross-linked polymer network.

[0088] In the method, the birefringence colors of the carrier at different strain rates, different ambient temperatures and different stretching times are collected by a chromatographic recording system.

[0089] In the method, the chromatogram recording system includes a light source, a polarizer, a heating system for adjusting the temperature of a carrier, a tensile testing system and an analyzer.

[0090] In the method described above, the key is composed of 3i+6 digits, which are the decryption loading rate, the ambient temperature T and the time key t1t2t3...t i , the 1st to 3rd digits of the key are the mechanical key: 1000 times the loading rate v. If the number is less than 3, it will be padded with 0. For example: the loading strain rate is 0.01s -1 , then the corresponding position in the key is 010; the 4th to 6th bits of the key are the temperature key, which represents the decrypted Kelvin temperature. For example, when the temperature is 150℃ (423K), the corresponding position of the key is 423; starting from the 7th bit, every 3 digits of the key corresponds to a birefringence color decryption time t i (i=1,2,3,...), if a single time is less than 3 digits, it is padded with 0. For example, if the key starts from the 7th digit and is 050101203..., it means that the first decryption time is 50 seconds after loading, the second decryption time is 101 seconds, and the third decryption time is 203 seconds after loading...

[0091] In the method, the network components of the carrier lead to different responses of birefringence colors under the same action conditions, and the key includes the dynamic bond catalyst content of the carrier.

[0092] In the method, the corresponding birefringence colors are obtained by adjusting the ambient temperature, strain rate, stretching time, strain rate of the carrier and network composition of the carrier to form a password database.

[0093] In the method described, the user dynamically decrypts the material key to obtain a birefringence color sequence, and finally decrypts the color sequence into the data to be transmitted according to the code book.

[0094] Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-mentioned specific embodiments and application fields. The above-mentioned specific embodiments are merely illustrative and instructive, and are not restrictive. A person skilled in the art, guided by this specification and without departing from the scope of protection of the claims of the present invention, may also devise various forms, all of which fall within the scope of protection of the present invention.

Claims

1. A high-dimensional data encryption method based on dynamic cross-linked polymers, characterized in that: It includes the following steps: The encryption party provides a dynamic cross-linked polymer as the material key and carrier of data encryption; Establish a random single mapping relationship between the RGB value of the birefringence color and the encrypted data as the code book; The encrypted data is compiled into a reproducible birefringence color sequence according to a random single mapping relationship, and then a key including a temperature key, a mechanical key, and a time sequence key is generated according to the response model of the dynamic cross-linked polymer birefringence color. The temperature key is the ambient temperature during dynamic decryption, the mechanical key is the strain rate during dynamic decryption, and the time sequence key is the time of birefringence color extraction during dynamic decryption. Decrypting the carrier according to the key to obtain a birefringence color containing encrypted information; Among them, the response model of the birefringence color of the dynamic cross-linked polymer is: (1)， The optical coefficient C and initial crosslinking density N of the material in the model are obtained from the rapid tensile test of the material, respectively: (2)， The slopes of N, C, and K are obtained by linear fitting formulas (2) and (1). B is the Boltzmann constant; T is the ambient temperature, Δn represents the optical birefringence value of the material; λ is the stretch ratio of the material; S(λ,T) refers to the nominal stress of the material under the conditions of stretch ratio λ and ambient temperature T.

2. The method according to claim 1, characterized in that The RGB value of the birefringence color is the transmitted password information.

3. The method according to claim 1, characterized in that The random single mapping relationship is the number-color mapping.

4. The method according to claim 1, wherein Included in the material key is the catalyst content of the support.

5. The method according to claim 1, wherein The dynamic cross-linked polymer is formed into a dynamic cross-linked network structure by introducing dynamic chemical bonds into a permanent cross-linked polymer network.

6. The method according to claim 1, characterized in that The key consists of 3i+6 digits, which are the decryption loading rate, ambient temperature T and time key t1t2t3...t i .

7. The method according to claim 6, characterized in that The 1st to 3rd digits of the key are the mechanical key of 1000 times the loading rate v. If the number is less than 3, it will be padded with 0. The 4th to 6th digits of the key are the temperature key representing the decrypted Kelvin temperature. Starting from the 7th digit, every 3 digits of the key correspond to a birefringence color decryption time t. i , i=1,2,3,..., if a single moment is less than 3 digits, it will be padded with 0.

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