Data high-dimension encryption method based on dynamic cross-linked polymer

Abstract

The invention discloses a data high-dimension encryption method based on a dynamic cross-linked polymer, and the method comprises the steps: an encryption party provides the dynamic cross-linked polymer as a material secret key and a data encryption carrier; establishing a random single mapping relation between the RGB value of the birefringent color and the encrypted data as a password book; compiling the encrypted data into a reproduced birefringence color sequence according to a random single mapping relation, and generating a key according to a response model of the dynamic cross-linked polymer birefringence color; and decrypting the carrier according to the key to obtain the birefringence color containing the encrypted information.

Description

Technical Field

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

[0002] The main existing optical encryption methods are computer-based image encryption processing, pattern encryption processing, etc., which implement encryption by applying a wrapping function operation to the grayscale value and RGB value of the pixel. Then, an unwrapping operation is applied to the encrypted disordered image to obtain a decrypted image. Due to the penetration of network eavesdroppers and network hackers, these communication methods are at risk of being cracked as the frequency of use increases. In addition, most of the traditional encrypted communication methods mentioned above are highly dependent on computers, which brings inconvenience to decryption in emergencies (such as power outages, computer failures, and other unexpected situations). When encountering important keys with strong timeliness, the key may become invalid.

[0003] The characteristics of network topology rearrangement of dynamic cross-linked polymers are expected to bring new solutions to data encryption. However, the current methods of using the dynamic characteristics of dynamic cross-linked polymers to achieve optical encryption focus on stimulating the dynamic network through external factors to achieve the purpose of recording encryption patterns. The dynamic performance of the dynamic network is not utilized in the decryption process, and the decryption process is too simple, which poses a risk of information failure.

[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] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a high-dimensional data encryption method based on a dynamically cross-linked polymer to achieve space-time encrypted communication with better confidentiality. Under a polarized light field, the dynamically cross-linked polymer undergoes birefringence, and the birefringence color is an optical macroscopic manifestation of the birefringence phenomenon, and encrypted information can be transmitted through color signals. This method realizes dynamic decryption by utilizing the dynamic optical response characteristics of the dynamically cross-linked polymer, and then finally realizes optical high-dimensional encryption by adjusting the decryption conditions.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A data high-dimensional encryption method based on a dynamically cross-linked polymer of the present invention comprises: The encryption party provides a dynamic cross-linked polymer as a material key and carrier for data encryption; A random single mapping relationship between the RGB value of the birefringence color and the encrypted data is established as a code book; The encrypted data is compiled into a reproduced 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; The carrier is decrypted according to the key to obtain the birefringence color containing the encrypted information.

[0007] In the method described, the RGB value of the birefringence color is the transmitted cryptographic information.

[0008] In the method described, the random single mapping relationship is a number-color mapping.

[0009] In the method described, the key includes a temperature-based key, a mechanical key, and a time sequence key.

[0010] In the method described, 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.

[0011] In the method described, the response model of the birefringence color of the dynamically cross-linked polymer is: (1) 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; (2) By linearly fitting the slopes of formulas (2) and (1), we can get N, C, and K. 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.

[0012] In the method described, the material key includes the catalyst content of the carrier.

[0013] In the method, the dynamic cross-linked polymer is prepared into a dynamic cross-linked network structure by introducing dynamic chemical bonds into a permanent cross-linked polymer network.

[0014] In the method described, 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 .

[0015] In the method described, the 1st to 3rd bits of the key are mechanical keys of 1000 times the loading rate v. If the number is less than 3, it is padded with 0. The 4th to 6th bits of the key are temperature keys 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 time is less than 3 digits, it will be padded with 0. Beneficial Effects

[0016] The present invention dynamically decrypts the dynamic cross-linked polymer according to the key to achieve data encryption in the time dimension and the space dimension, and can store, send and other encrypted information in time and space through the material key. The decryption link uses the dynamic optical response of the dynamic cross-linked polymer to achieve dynamic decryption. The encryption link introduces material keys, mechanical keys, and temperature keys; the dynamic decryption link introduces time series keys. These conditions add a barrier to the encrypted information that is difficult to decipher. The present invention fully utilizes the dynamics of the cross-linked network during decryption, controls the dynamic optical response from multiple dimensions such as temperature, strain rate, and material composition, and then transmits encrypted information in dynamic optical color changes.

[0017] 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 to enable those skilled in the art to 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 implementation methods of the present invention are described below by way of example. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] By reading the detailed description of the preferred specific embodiments below, various other advantages and benefits of the present invention will become clear to those of ordinary skill in the art. The drawings in the specification are only for the purpose of illustrating the preferred embodiments and are not considered to be limitations of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative work. Moreover, the same reference numerals are used to represent the same components throughout the drawings.

[0020] In the attached picture: Figure 1 It 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 an embodiment of the present disclosure; Figure 2 This is a schematic diagram of chromatographic collection of a carrier material at different stretching ratios in a data high-dimensional encryption method based on a dynamic cross-linked polymer provided by an embodiment of the present disclosure; Figure 3It is a key schematic diagram of a data high-dimensional encryption method based on a dynamic cross-linked polymer provided by an embodiment of the present disclosure; Figure 4 It 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.

[0021] The present invention is further explained below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described in combination 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 creative work are within the scope of protection of the present invention.

[0023] 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 claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] 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 require further definition and explanation in subsequent drawings.

[0025] 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 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0029] 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 in conjunction with the accompanying drawings, and each of the accompanying drawings does not constitute a limitation on the embodiments of the present invention.

[0030] 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: The encryption party provides a dynamic cross-linked polymer as a material key and carrier for data encryption; A random single mapping relationship between the RGB value of the birefringence color and the encrypted data is established as a code book; The encrypted data is compiled into a reproduced 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; The carrier is decrypted according to the key to obtain the birefringence color containing the encrypted information.

[0031] In a preferred embodiment of the method, the RGB value of the birefringence color is the transmitted cryptographic information.

[0032] In a preferred implementation of the method, the random single mapping relationship is a number-color mapping.

[0033] In a preferred implementation of the method, the key includes a temperature-based key, a mechanical key, and a time sequence key.

[0034] 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.

[0035] In a preferred embodiment of the method, the response model of the birefringence color of the dynamically cross-linked polymer is: (1) 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; (2) By linearly fitting the slopes of formulas (2) and (1), we can get N, C, and K. B is the Boltzmann constant; T is the ambient temperature, Δn represents the optical birefringence value of the material; λ is the stretching ratio of the material, S(λ,T) refers to the nominal stress of the material under the conditions of stretching 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.

[0036] In a preferred embodiment of the method, the material key includes the catalyst content of the carrier.

[0037] In one embodiment, the method comprises the following steps: 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; Obtaining and recording a birefringent color ribbon of the carrier, wherein the birefringent color ribbon is obtained by 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; According to the requirements of encrypted communication, the birefringence color containing the encrypted information 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.

[0038] The carrier is decrypted according to the key to obtain the birefringence color containing the encrypted information.

[0039] In a preferred embodiment of the method, the RGB value of the birefringence color is a single mapping of the transmitted cryptographic information.

[0040] In a preferred embodiment of the method, the dynamically cross-linked polymer is formed into a dynamically cross-linked network structure by introducing dynamic chemical bonds into a permanently cross-linked polymer network.

[0041] In a preferred embodiment of the method, the basic light of different colors of the carrier, the birefringence colors under different stresses at different ambient temperatures and different stretching times are collected by a color spectrum recording system.

[0042] In a preferred embodiment of the method, the chromatogram recording system comprises a light source part, a polarizer, a heating system for adjusting the temperature of the carrier, and an analyzer.

[0043] 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°C (423K), the corresponding position of the key is 423; 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 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 50s after loading, the second decryption time is 101s, and the third decryption time is 203s after loading... 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.

[0044] In a preferred embodiment of the method, the corresponding birefringence colors are obtained by adjusting the ambient temperature, the stretching time, the strain rate of the carrier and / or the network composition of the carrier to form the cryptographic library.

[0045] In one embodiment, the method includes, Preparation of reusable carriers, such as Figure 1As shown in the figure, cross-linked polymers are a type of dynamic cross-linked polymers with a cross-linked three-dimensional network structure. The cross-linked network maintains the dimensional stability of the polymer and gives the cross-linked polymer the characteristics of high temperature resistance, insulation, high strength and high stiffness. Epoxy polymer materials containing dynamic bonds are a new type of dynamic cross-linked polymer with a wide range of applications and reusability. Dynamic cross-linked networks are made by introducing dynamic chemical bonds (DCBs) into permanent covalent networks (PCNs). Due to the presence of dynamic chemical bonds, the polymer chains in the dynamic cross-linked network structure can undergo bond exchange reactions under certain external environmental stimuli (such as light and heat). The dissociation and reconnection of dynamic bonds cause the topological rearrangement of the polymer network, which exhibits the characteristics of stress relaxation and viscoelasticity on a macro scale. Due to the introduction of dynamic chemical bonds, while retaining the original stable three-dimensional cross-linked network, it has the characteristics of recyclability, reshaping and self-healing.

[0046] Glass transition temperature is a very critical physical quantity for color carrier materials. At room temperature, the carrier material has similar physical properties to epoxy resin, but when the ambient temperature is close to or higher than the glass transition temperature, the bond exchange reaction of the material is activated, and the mechanical behavior of the material at this time is temperature-dependent.

[0047] Before conducting the experiment, we must first determine the experimental conditions. 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. For stretching experiments, the theoretical formula is as follows: (2) Where N is the initial crosslinking density of the material; K B is the Boltzmann constant; T is the ambient temperature specified in the experiment. The value on the left side of the equation represents the nominal stress value of the material corresponding to different stretching ratios at different temperatures. For the carrier material, its birefringence and stress value show the following relationship: (3) 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 detecting the stress value during the tensile test. Figure 4 Shown is 180°C, strain rate 10 -3 (s 1 ) under different stretching ratios. In this case, the dimensions of the carrier material are: 60 mm × 10 mm × 2 mm (length × width × thickness).

[0048] (4) Formula (4) reflects the relationship between the light intensity of the carrier material recorded at the decryption moment during the stretching process and its birefringence. 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.

[0049] 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.

[0050] like Figure 3 As shown, in addition to the preparation of the carrier material and the collection of the chromatogram, the most critical factor for encrypted communication is the generation of the key. The key is composed of 3i+6 (i is the number of password bits) digits. 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°C (423K), the corresponding position of the key is 423; 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 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 50s after loading, the second decryption time is 101s, and the third decryption time is 203s after loading... like Figure 4 As shown, in the decryption step, the encrypted transmission terminal decrypts the carrier material in response to the action conditions according to the obtained key, obtains the birefringence color containing the encrypted information, and completes the translation of the final birefringence color sequence to the required data according to the code book.

[0051] In one embodiment, the time response of the birefringence color of the dynamic cross-linked polymer is used to translate the data into the birefringence color under specific conditions, thereby realizing data encryption. When encrypting: First, the user selects a certain dynamic cross-linked polymer system according to the needs, which is the material key. The user can select a single material unit to realize single-channel information encryption, or select different material units to prepare multiple encryption channel materials in an integrated manner to realize multi-channel information encryption; second, establish a random single mapping relationship between the RGB value of the birefringence color and the encrypted data (number-color mapping), which is the code book; third, set the temperature key and mechanical key (uniaxial stretching rate of the material), and translate the data into a specific color sequence under this condition according to the code book; fourth, according to the response model of the birefringence color of the dynamic cross-linked polymer, the color sequence is converted into a time sequence, that is, the time key; when decrypting, the user uniaxially stretches the material key according to the temperature key and mechanical key provided by the encryption party, extracts the birefringence color sequence according to the time key, and completes the acquisition of light information. Finally, according to the code book, the color sequence is decrypted into the target data.

[0052] In one embodiment, the method includes, 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; According to the dynamic chain evolution model of dynamic cross-linked polymers, combined with the optical Lorentz formula, a dynamic birefringence color evolution model is established. It is established that there is a random single mapping relationship (number-color mapping) between the RGB value of the birefringence color and the encrypted data, which is the code book.

[0053] Obtaining and recording a birefringent color ribbon of the carrier, wherein the birefringent color 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; According to the requirements of encrypted communication, the birefringence color containing 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.

[0054] In the method, the dynamic cross-linked polymer is prepared into a dynamic cross-linked network structure by introducing dynamic chemical bonds into a permanent cross-linked polymer network.

[0055] In the method, the birefringence color of the carrier at different strain rates, different ambient temperatures and different stretching times is collected by a chromatographic recording system.

[0056] In the method described, the chromatogram recording system includes a light source part, a polarizer, a heating system for adjusting the temperature of the carrier, a stretching test system and an analyzer.

[0057] In the method described, 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 it is less than 3 digits, it will be padded with 0. For example: the loading strain rate is 0.01s -1 , 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 correspond to a double refraction 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 50s after loading, the second decryption time is 101s, and the third decryption time is 203s after loading... 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.

[0058] 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 components of the carrier to form a password database.

[0059] In the method described, the user dynamically decrypts the material key to obtain a birefringence color sequence, and finally interprets the color sequence into the data to be transmitted according to the code book.

[0060] Although the embodiments of the present invention are described above in conjunction with the accompanying drawings, the present invention is not limited to the above specific embodiments and application fields, and the above specific embodiments are only illustrative and instructive, rather than restrictive. A person of ordinary skill in the art can also make many forms under the guidance of this specification and without departing from the scope of protection of the claims of the present invention, all of which belong to the protection of the present invention.

Claims

1. A high-dimensional data encryption method based on a dynamically cross-linked polymer, characterized in that: It includes the following steps: The encryption party provides a dynamic cross-linked polymer as a material key and carrier for data encryption; Establish a random single mapping relationship between the RGB value of the birefringence color and the encrypted data as a code book; The encrypted data is compiled into a reproduced 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; The carrier is decrypted according to the key to obtain the birefringence color containing the encrypted information.

2. The method according to claim 1, characterized in that Preferably, the RGB value of the birefringence color is the transmitted cryptographic 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, characterized in that The keys include temperature-based keys, mechanical keys, and time sequence keys.

5. The method according to claim 4, characterized in that 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.

6. The method according to claim 1, characterized in that The response model of the birefringence color of dynamically cross-linked polymers is: (1)， 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; (2)， By linearly fitting the slopes of formulas (2) and (1), we can get N, C, and K. 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.

7. The method according to claim 1, characterized in that Included in the material key is the catalyst content of the support.

8. The method according to claim 1, characterized in that: 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.

9. 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 .

10. The method according to claim 9, 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 digits, 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 time is less than 3 digits, it will be padded with 0.

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