Encryption film, modular encryption film and manufacturing method thereof, information encryption method

Abstract

The embodiment of the present application discloses an encryption film, a modular encryption film and a method for making the same, and an information encryption method. The encryption film includes a masking layer, an encryption information layer, and an afterglow encryption information layer; the masking layer is used to display basic information and mask the encryption information layer and the afterglow encryption information layer; the encryption information layer is used to carry the first encryption information and mask the afterglow encryption information layer; the afterglow encryption information layer is used to carry the second encryption information; wherein the encryption information layer and the afterglow encryption information layer respectively contain different types of carbon dot materials, and display the first encryption information or the second encryption information under the control of an ultraviolet light source of a specific wavelength. This method realizes physical encryption through a structure set by three layers of carbon dot materials, and does not require purification of carbon dots, simplifies the preparation process, and thus improves preparation efficiency.

Description

Technical Field

[0001] The present application relates to the field of security technology, and in particular to an encryption film, a modular encryption film and a manufacturing method thereof, and an information encryption method. Background Art

[0002] With the continuous development of science and technology, especially information security, encryption is currently used to solve the security problem of information in the transmission process, mainly including algorithm encryption and process encryption, and process encryption is mainly achieved by preparing encryption materials.

[0003] Current encryption materials and preparation schemes usually require complex chemical synthesis processes or precise physical preparation techniques. The preparation tools required are expensive, and the preparation process is cumbersome and time-consuming, resulting in low preparation efficiency. The corresponding encryption and decryption process is also relatively complicated. Summary of the invention

[0004] Based on this, the present application provides an encryption film, a modular encryption film and a manufacturing method thereof, and an information encryption method to solve the problem that the existing encryption film structure setting leads to a complex preparation process and low efficiency.

[0005] In a first aspect, an encryption film is provided, comprising: a masking layer, an encryption information layer, and an afterglow encryption information layer;

[0006] The masking layer is used to display basic information and mask the encrypted information layer and the afterglow encrypted information layer;

[0007] The encrypted information layer is used to carry the first encrypted information and cover the afterglow encrypted information layer;

[0008] The afterglow encryption information layer is used to carry the second encryption information;

[0009] The encrypted information layer and the afterglow encrypted information layer respectively contain different types of carbon dot materials, and display the first encrypted information or the second encrypted information under the control of an ultraviolet light source with a specific wavelength.

[0010] Optionally, the encrypted information layer displays the first encrypted information when irradiated by an ultraviolet light source of a specific wavelength at room temperature;

[0011] The afterglow encrypted information layer is irradiated with an ultraviolet light source of a specific wavelength at a specific temperature and then turned off to display the second encrypted information.

[0012] Optionally, the carbon dots in the encryption information layer are o-CDs.

[0013] Optionally, the o-CDs are carbon dot materials synthesized using o-phenylenediamine, citric acid and methanol.

[0014] Optionally, the carbon dots in the afterglow encryption information layer are L-CDs.

[0015] Optionally, the L-CDs are carbon dot materials synthesized using levofloxacin and methanol.

[0016] Optionally, the masking layer is a thin film material with an opaque property.

[0017] In a second aspect, a modular encryption film is provided, comprising at least two of the encryption films provided above, wherein the at least two encryption films are arranged in a specific order.

[0018] In a third aspect, a method for manufacturing an encryption film is provided, which is applied to the above-mentioned encryption film, and the manufacturing method comprises:

[0019] Obtain corresponding weights of o-phenylenediamine, citric acid, levofloxacin and methanol to prepare o-CDs and L-CDs respectively;

[0020] Dissolving the o-CDs and the L-CDs in a PVP solution, respectively, to form a first carbon dot solution and a second carbon dot solution;

[0021] The first carbon dot solution and the second carbon dot solution are respectively made into an encrypted information layer and an afterglow encrypted information layer, and are dried and spliced ​​to obtain an encrypted film with a dual encryption function.

[0022] In a fourth aspect, an information encryption method is provided, comprising:

[0023] Acquire information to be encrypted, and divide the information to be encrypted according to importance to obtain an information set;

[0024] generating a corresponding information pattern based on each information in the information set;

[0025] The information patterns are sorted according to their importance, and are made in order from low to high importance using the encryption film making method provided above to achieve information encryption, wherein the information pattern in the afterglow encrypted information layer has the highest level, and the information pattern in the encrypted information layer has the lowest level.

[0026] The above-mentioned encryption film, modular encryption film and its manufacturing method, and information encryption method, the encryption film includes a masking layer, an encryption information layer and an afterglow encryption information layer; the masking layer is used to display basic information and cover the encryption information layer and the afterglow encryption information layer; the encryption information layer is used to carry the first encryption information and cover the afterglow encryption information layer; the afterglow encryption information layer is used to carry the second encryption information; wherein the encryption information layer and the afterglow encryption information layer respectively contain different types of carbon dot materials, and display the first encryption information or the second encryption information under the control of ultraviolet light source of a specific wavelength. This method realizes physical encryption through a structure set by three layers of carbon dot materials, and does not require purification of carbon dots, simplifies the preparation process, and thus improves preparation efficiency.

[0027] At the same time, each layer can display different information under specific conditions, thereby providing multiple encryptions within a film, making it applicable to the field of information security, and is particularly suitable for occasions where there are requirements for efficient and secure encryption materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic diagram of the structure of the encryption film provided in the embodiment of the present application;

[0030] Figure 2 To encrypt the morphology of the film observed by naked eyes at room temperature;

[0031] Figure 3 To encrypt the morphology of the film observed by naked eyes after irradiation with 365nm violet light at room temperature;

[0032] Figure 4 To encrypt the film, after heating at 80°C for 10 min, irradiating with a purple light for 5 s, irradiating with a 365 nm purple light and then turning it off, the morphology observed by the naked eye;

[0033] Figure 5 A schematic diagram of the structure of a modular encryption film provided in an embodiment of the present application;

[0034] Figure 6 A schematic diagram of a process for manufacturing an encryption film provided in an embodiment of the present application;

[0035] Figure 7 A flowchart of an information encryption method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0038] See also Figure 1 , is a structural diagram of an encryption film provided in an embodiment of the present application, the encryption film includes three layers of carbon dot film materials, each layer of film material is used to encrypt different information, and the use of encryption film to achieve information encryption here should be understood as obtaining the shape of the corresponding layer of film material based on the information to be encrypted, and then using a manufacturing method to manufacture each layer of film material, thereby obtaining an encryption film with three layers of film materials fused together.

[0039] In this embodiment, the encryption film includes: a first film layer, a second film layer and a third film layer arranged from top to bottom in space, wherein:

[0040] The first layer of film, as a masking layer 110, is used to display basic information and mask the encrypted information layer 120 and the afterglow encrypted information layer 130; wherein the masking layer 110 is a film material with an opaque property.

[0041] The second film, as the encryption information layer 120, is used to carry the first encryption information and cover the afterglow encryption information layer.

[0042] The third film layer, serving as the afterglow information layer 130, is used to carry the second encrypted information.

[0043] The encrypted information layer 120 and the afterglow encrypted information layer 130 respectively contain different types of carbon dot materials, and display the first encrypted information or the second encrypted information under the control of an ultraviolet light source with a specific wavelength.

[0044] It should be noted that when the encrypted information layer 120 and the afterglow encrypted information layer 130 are illuminated by 365nm light, the emission wavelength of the carbon dot material on the encrypted information layer 120 and the emission wavelength of the carbon dot material on the afterglow encrypted information layer 130 are both 515nm. Under normal circumstances, the encrypted film does not display any information, or only displays the basic information on the mask layer 110, such as Figure 2 shown.

[0045] The information recorded on the encrypted information layer 120 and the afterglow encrypted information layer 130 is mainly hidden by the characteristics of the carbon dot material itself to achieve information encryption. The two information layers are different in information display. The encrypted information layer 120 is displayed by real-time irradiation of the purple light, while the afterglow encrypted information layer 130 is first irradiated and then turned off before displaying.

[0046] It is understandable that the encrypted information layer 120 displays the first encrypted information when irradiated with a UV light source of a specific wavelength at room temperature; that is, the information in the encrypted information layer 120 can be observed by naked eyes under a 365nm light, and the afterglow encrypted information layer 130 is not displayed at this time, and is blocked by the encrypted information layer 120 under the 365nm light. Figure 3 shown.

[0047] The afterglow encrypted information layer 130 is irradiated with a specific wavelength of ultraviolet light at a specific temperature and then turned off to display the second encrypted information. That is, after the afterglow encrypted information layer 130 is irradiated with 365nm light, the light is turned off, and the masking layer 110 and the encrypted information layer 120 do not emit light, and only the carbon dot material of the afterglow encrypted information layer 130 emits light, showing the key information. The most critical point is that after a period of time at room temperature, the information in the afterglow encrypted information layer will not appear when the encrypted film is irradiated with 365nm light. Figure 4 shown.

[0048] In another embodiment, the carbon dots in the encryption information layer 120 are o-CDs, wherein the o-CDs are carbon dot materials synthesized using o-phenylenediamine, citric acid and methanol.

[0049] Specifically, 0.162 g of o-phenylenediamine and 0.096 g of citric acid were ultrasonically dispersed in 30 ml of ethanol, and 2 ml of 10% sulfuric acid was added, and the dispersion quickly turned into white flocs. The mixture was sealed in a stainless steel hydrothermal synthesis reactor, heated to 200° C., and cooled to room temperature after 3 hours to obtain o-CDs.

[0050] In another embodiment, the carbon dots in the afterglow encryption information layer are L-CDs, wherein the L-CDs are carbon dot materials synthesized from levofloxacin and methanol.

[0051] Specifically, 0.36 g of levofloxacin was ultra-dispersed in 30 ml of methanol, the mixture was sealed in a stainless steel hydrothermal synthesis reactor, heated to 200° C., and cooled to room temperature after 3 hours to obtain L-CDs.

[0052] Based on the above-mentioned settings of the encrypted information layer and the afterglow encrypted information layer, due to the high luminescence intensity and strong afterglow performance of the carbon dots in these two information layers, the carbon dots after hydrothermal synthesis can be prepared without filtering and dialysis steps, which greatly saves the preparation time and thus improves the generation efficiency of the encrypted film.

[0053] The present application also provides a modular encryption film, such as Figure 5 As shown, it includes at least two encryption films provided by the above embodiments, and the at least two encryption films are arranged in a specific order. It should be noted that each encryption film carries different information, and the encryption films are processed by different processes to display corresponding information, and then all the information is spliced ​​in the corresponding order to obtain complete information.

[0054] like Figure 6 As shown, a method for manufacturing an encryption film is provided for an embodiment of the present application, and the method comprises the following steps:

[0055] S61, obtaining corresponding weights of o-phenylenediamine, citric acid, levofloxacin, ethanol and methanol to prepare o-CDs and L-CDs, respectively.

[0056] Specifically, corresponding weights of o-phenylenediamine, citric acid and ethanol are processed to synthesize o-CDs, and corresponding weights of levofloxacin and methanol are processed to synthesize L-CDs.

[0057] In practical applications, 0.162 g of o-phenylenediamine and 0.096 g of citric acid were ultrasonically dispersed in 30 ml of ethanol, and 2 ml of 10% sulfuric acid was added, and the dispersion quickly turned into white flocs. The mixture was sealed in a stainless steel hydrothermal synthesis reactor, heated to 200°C, and cooled to room temperature after 3 hours to obtain o-CDs.

[0058] 0.36 g of levofloxacin was ultra-dispersed in 30 ml of methanol. The mixture was sealed in a stainless steel hydrothermal synthesis reactor, heated to 200° C., and cooled to room temperature after 3 hours to obtain L-CDs.

[0059] S62, dissolving the o-CDs and the L-CDs in the PVP solution, respectively, to form a first carbon dot solution and a second carbon dot solution.

[0060] In this step, a PVP solution is first prepared, and then the PVP solution is divided into two parts, which are mixed with o-CDs and L-CDs respectively to obtain a first carbon dot solution and a second carbon dot solution.

[0061] Specifically, 1 g of vacuum-dried polyvinylpyrrolidone (PVP) was dissolved in 40 ml of distilled water and gently stirred at 50° C. to form a uniform PVP solution.

[0062] First, half of the PVP solution was taken and dropped into a methanol solution containing 1 mgo-CDs, and stirred at 65 °C for 60 min to remove methanol and prevent the formation of visible bubbles, thereby obtaining the first carbon dot solution.

[0063] Then, the other half of the PVP solution was dropped into a methanol solution containing 2 mg L-CDs and stirred at 65 °C for 60 min to remove methanol and prevent the formation of visible bubbles, thereby obtaining a second carbon dot solution.

[0064] S63, making the first carbon dot solution and the second carbon dot solution into an encrypted information layer and an afterglow encrypted information layer respectively, and performing drying and splicing treatment to obtain an encrypted film with dual encryption function.

[0065] In practical applications, when preparing the encrypted information layer and the afterglow encrypted information layer, they can be prepared separately and then combined, or they can be coated in sequence.

[0066] When using the sequential coating method, the first carbon dot solution is first coated on the surface of the mask layer to form an encrypted information layer, and the mask layer is an opaque substrate. Then, the second carbon dot solution is coated on the encrypted information layer to form an afterglow encrypted information layer, and then dried to obtain an encrypted film with dual encryption functions.

[0067] Specifically, the viscous solutions (i.e., the first carbon dot solution and the second carbon dot solution) were poured into 10 cm × 10 cm square polystyrene petri dishes and stored overnight in an atmosphere at 30 ° C to remove the solvent. (The heating device should be leveled in advance to obtain a high-quality film with uniform thickness.) After molding, the composite film was gently peeled off the petri dish, cut into the shape to be encrypted, and further dried at 120 ° C and 101 kPa for 2 hours. Then, a 50 μm polyethylene terephthalate (PET) was used to seal the encrypted film by lamination.

[0068] In another embodiment, when the encrypted film is produced based on the first carbon dot solution and the second carbon dot solution in combination with the mask layer, it can be achieved in the following two ways:

[0069] The first method is to coat the film into a corresponding shape according to the information that each layer needs to carry. For example, after converting the information into an image in the form of a QR code, a barcode, etc., the first carbon dot solution and the second carbon dot solution are coated according to the corresponding image. After drying, the corresponding information layer is obtained, thereby obtaining an encrypted film.

[0070] The second method is to first apply the first carbon dot solution and the second carbon dot solution on a plane respectively, and after drying, cut them based on the image corresponding to the information, and then merge them into an encrypted film with a three-layer film structure.

[0071] like Figure 5 As shown, the encryption information of the afterglow encryption information layer is taken as an example. The L-CDs / PVP of the afterglow encryption information layer is cut into the required barcode shape to prepare an encryption film. Similarly, the L-CDs / PVP can be cut into the required QR code shape for encryption. The figure shows that the L-CDs / PVP of the afterglow encryption information layer is cut into a barcode shape to prepare an encryption film. The encryption film can be cut twice, and after the film is cut, different combinations can be formed according to different needs to form new barcode information. The barcode based on 4 films can form 4 square combinations. The more films that can be combined, the more barcodes can be matched.

[0072] By implementing the above method, an encryption film with a three-layer structure including a masking layer, an encryption information layer and an afterglow encryption information layer is produced. The encryption information layer in the encryption film and the afterglow encryption information layer contain different carbon dot materials, and there is no need to additionally purify the carbon dot materials. A highly secure modular dual encryption scheme is constructed using only flexible organic materials with dynamic ultra-long room temperature phosphorescence properties.

[0073] It also combines advanced material science and cryptography technology to solve the current problems of encryption materials being difficult to prepare, expensive, and outdated. Our solution is not only highly efficient and responsive, but also extremely secure. By applying this innovative material to the field of information security, we will bring real breakthroughs and progress to the field of encryption technology.

[0074] See also Figure 7 , is an embodiment of the information encryption method provided by the present application, comprising the following steps:

[0075] S71, obtaining information to be encrypted, and dividing the information to be encrypted according to importance to obtain an information set.

[0076] In this embodiment, the information to be encrypted can be data in any form, such as text, image, or even a QR code.

[0077] Generally, this information is divided into important and unimportant levels, and is divided into multiple levels based on the importance, for example, three levels, and whether each level needs to be hidden is determined based on the size of the level, thereby forming a hierarchical relationship diagram of information.

[0078] S72, generating a corresponding information pattern based on each information in the information set.

[0079] When the information is a pattern, the information itself is used as the information pattern to perform subsequent operations. Otherwise, the information needs to be converted into a pattern, which can be achieved through a text-to-image conversion algorithm, and common algorithms include information-to-QR code and barcode conversion algorithms.

[0080] S73, sorting each information pattern according to the importance, and making it in order from low to high importance, and encrypting the information.

[0081] In obtaining the information pattern, the corresponding information layer is manufactured using the method for manufacturing the encryption film provided in the above embodiment. It is understandable that the information layer manufactured here is a film layer having the same shape as the information pattern to achieve information encryption.

[0082] In another embodiment, the encryption film manufacturing method provided by the above embodiment is used to first manufacture an encryption information layer and an afterglow encryption information layer, and then the encryption information layer or the afterglow encryption information layer is selected for cutting based on the information pattern, and finally the cut films are combined into an encryption film.

[0083] In summary, the information to be encrypted is converted into the above-mentioned encryption information layer and afterglow encryption information layer. Due to the high luminescence intensity and strong afterglow performance of the carbon dots in these two information layers, the carbon dots after hydrothermal synthesis can skip the filtration and dialysis steps, which greatly saves the preparation time and thus improves the generation efficiency of the encryption film.

[0084] It should be understood that, although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0085] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An encrypted film, characterized in that: include: masking layer, encrypted information layer and afterglow encrypted information layer; The masking layer is used to display basic information and mask the encrypted information layer and the afterglow encrypted information layer; The encrypted information layer is used to carry the first encrypted information and cover the afterglow encrypted information layer; The afterglow encryption information layer is used to carry the second encryption information; The encrypted information layer contains o-CDs synthesized from o-phenylenediamine, citric acid and ethanol, and the afterglow encrypted information layer contains L-CDs synthesized from levofloxacin and methanol; the encrypted information layer displays the first encrypted information when irradiated with a 365nm ultraviolet light source at room temperature; the afterglow encrypted information layer displays the second encrypted information after being heated at 80°C for 10 minutes, irradiated with a 365nm ultraviolet light source and then turned off.

2. The encryption film according to claim 1, characterized in that: The masking layer is a thin film material with an opaque property.

3. A modular encryption film, characterized in that: The method comprises at least two encryption films as claimed in claim 1 or 2, wherein the at least two encryption films are arranged in a specific order.

4. A method for manufacturing an encryption film according to claim 1 or 2, the manufacturing method comprising: Obtain corresponding weights of o-phenylenediamine, citric acid, levofloxacin, ethanol and methanol to prepare o-CDs and L-CDs respectively; Dissolving the o-CDs and the L-CDs in a PVP solution, respectively, to form a first carbon dot solution and a second carbon dot solution; The first carbon dot solution and the second carbon dot solution are respectively made into an encrypted information layer and an afterglow encrypted information layer, and are dried and spliced ​​to obtain an encrypted film with a dual encryption function.

5. An information encryption method, characterized in that: The method comprises: Acquire information to be encrypted, and divide the information to be encrypted according to importance to obtain an information set; generating a corresponding information pattern based on each information in the information set; The information patterns are sorted according to their importance, and are made in order from low to high importance using the method for making an encryption film as described in claim 4 to achieve information encryption, wherein the information pattern in the afterglow encrypted information layer has the highest level, and the information pattern in the encrypted information layer has the lowest level.

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