KR102228952B1 - Encrypting and decrtypting apparatus equipped with polarization phenomenon of magnetic fluid and encrypting and decrtypting method using the same apparatus - Google Patents

Abstract

The present invention relates to an encryption and decryption apparatus using the polarization phenomenon of light appearing in a magnetic fluid, and an encryption and decryption method using the same.
In more detail, the encryption transmission unit for emitting the encrypted image as light; A polarization filter unit in which the light emitted from the encryption transmission unit is incident and second-order encryption is performed by a polarization phenomenon; And an encryption and decryption apparatus using a polarization phenomenon of light appearing from a magnetic fluid, and an encryption and decryption method using the same.

Description

Encryption and decryption device using polarization of light appearing from magnetic fluid, and encryption and decryption method applying it {ENCRYPTING AND DECRTYPTING APPARATUS EQUIPPED WITH POLARIZATION PHENOMENON OF MAGNETIC FLUID AND ENCRYPTING AND DECRTYPTING METHOD USING THE SAME APPARATUS}

The present invention relates to an encryption and decryption apparatus and method using a magnetic fluid as a polarization filter, and more particularly, to an encryption and decryption apparatus and an encryption and decryption method using a polarization phenomenon of light appearing in a magnetic fluid.

Although the importance of personal information security is being emphasized more and more in the modern information society, personal information leakage accidents through hacking and the like occur every year. In order to prevent the exposure of other important information as well as personal information about such hacking, it will be said that encryption technology with security for information is essential.

Among the existing public key cryptography methods, the most widely used public key cryptosystem is RSA cryptography. The RSA encryption system has the advantage that there is no risk of exposure of the encryption key during transmission as the receiver owns the encryption key by default, and if the receiver manages well, the risk of exposure to the outside like the encryption system prior to RSA is significantly reduced. .

However, despite this stability, the encryption algorithm of the RSA encryption system is based on the mathematical complexity of using a very large prime number, so there is a problem that it takes an excessively long time to generate the necessary password. In addition, if an algorithm that can be solved through prime factorization within a short time is found in the future, the security of the existing RSA encryption algorithm is expected to be broken.

Therefore, unlike the existing RSA encryption system, techniques for generating a password relatively easily without the need to find a large prime number have been proposed.

Republic of Korea Patent Registration No. 10-1602803 (name: encryption and decryption method using polarized light) is an encryption and decryption method using polarized light, which is set to '0' meaning horizontal polarization or '1' meaning vertical polarization. It proposes an encryption and decryption technology using the created encryption key.

However, even according to the present technology, there is a limitation in its utilization in that the polarization direction of light cannot be changed flexibly in the polarizing filter. Accordingly, the present invention proposes an encryption and decryption technique that uses polarization without the need to find a large prime number in generating a password, but utilizes the optical properties of light appearing from a magnetic fluid in a magnetic field.

Republic of Korea Patent Publication No. 10-1602803

An object of the present invention for solving the above problems is to provide an encryption and decryption apparatus that applies the polarization of light occurring in a magnetic fluid as a polarization filter, and an encryption and decryption method using the same.

The technical problem to be achieved by the present invention is not limited to the technical problems mentioned above, and other technical problems that are not mentioned can be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. There will be.

The configuration of the present invention for achieving the above object is a cryptographic transmission unit for emitting an encrypted image as light; A polarization filter unit in which the light emitted from the encryption transmission unit is incident and second-order encryption is performed by a polarization phenomenon; And it provides an encryption and decryption apparatus using a polarization phenomenon of light appearing in the magnetic fluid comprising a cipher receiving unit for receiving the second-order encrypted light from the polarization filter unit.

In an embodiment of the present invention, the polarizing filter unit comprises a magnetic fluid prepared by dissolving ferromagnetic particles having a special arrangement in a solvent in a colloidal form under a magnetic field; And an electromagnet that forms a magnetic field around the conductor when current is supplied to the conductor, and the polarization direction of the light incident on the polarization filter may be flexibly adjusted according to the direction of the magnetic field. .

In an embodiment of the present invention, the electromagnet comprises a circular solenoid made by winding a conductive wire in a dense and uniformly cylindrical shape; And a power source supplying current to the conducting wire.

In an embodiment of the present invention, the circular solenoid is configured such that an enamel wire with a covering winds the surface of the conductor wire, but the end of the conductor wire is configured to remove the covering of the enamel wire so that current can flow. It can be characterized.

In an embodiment of the present invention, further comprising an interferometer, wherein the interferometer consists of a Mach-Zehnder interferometer, and the light emitted from the encryption transmitter is divided in two directions by the interferometer to be encrypted or decrypted. have.

In an embodiment of the present invention, the interferometer unit may be characterized in that it receives the polarized light from the polarization filter unit.

In an embodiment of the present invention, the interferometer unit comprises: a first beam splitter configured to reflect some of the light incident from the emitting unit and transmit the rest of the incident light that is not reflected; A first mirror positioned at a location where light reflected from the first beam splitter reaches, and reflecting light reflected from the first beam splitter; A second mirror positioned at a location where light transmitted from the first beam splitter reaches, and reflecting light transmitted from the first beam splitter; And an agent positioned at a place where the light reflected from the first mirror and the light reflected from the second mirror reach together, transmits the light reflected from the first mirror, and reflects the light reflected from the second mirror. It may be characterized in that it includes a two-beam splitter.

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In an embodiment of the present invention, the encrypted image is composed of a 2ⁿⅹ2ⁿ square consisting of numbers converted to the binary method by converting a sentence to be encrypted into a binary number, and consisting of a number 1 in the square of 2ⁿⅹ2ⁿ. The part is filled with black, and the part composed of the number 2 in the square matrix of 2ⁿⅹ2ⁿ is filled with white, and thus the first encryption is performed.

Another configuration of the present invention for achieving the above object is to image the sentence to be encrypted; Emitting the image as light by an encryption transmitter; Incident light emitted from the encryption transmission unit to a polarization filter unit; Generating a polarization phenomenon on the light incident on the polarization filter unit; And incident light of the polarization phenomenon to the encryption receiving unit, wherein the polarization filter unit is a polarization filter unit of any one of claims 1 to 7, wherein the polarization phenomenon of light appears in a magnetic fluid is used. It provides encryption and decryption methods.

In an embodiment of the present invention, further comprising an interferometer, wherein the interferometer consists of a Mach-Zehnder interferometer, and the light emitted from the encryption transmitter is divided in two directions by the interferometer to be encrypted or decrypted. have.

In an embodiment of the present invention, the interferometer unit may be characterized in that it receives the polarized light from the polarization filter unit.

In an embodiment of the present invention, the interferometer unit comprises: a first beam splitter configured to reflect some of the light incident from the emitting unit and transmit the rest of the incident light that is not reflected; A first mirror positioned at a location where light reflected from the first beam splitter reaches, and reflecting light reflected from the first beam splitter; A second mirror positioned at a location where light transmitted from the first beam splitter reaches, and reflecting light transmitted from the first beam splitter; And an agent positioned at a place where the light reflected from the first mirror and the light reflected from the second mirror reach together, transmits the light reflected from the first mirror, and reflects the light reflected from the second mirror. It may be characterized in that it includes a two-beam splitter.

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In an embodiment of the present invention, the step of imaging the sentence as the object of the encryption comprises: encrypting the sentence as the object of the encryption into a binary number; Filling the number converted by the binary method into a square matrix of 2ⁿⅹ2ⁿ; And forming the image by filling a portion where the number is 1 in the square matrix with black color, and filling the portion where the number is 0 with white color.

The effect of the present invention according to the above configuration is to provide a simpler and more stable encryption method using a polarization filter based on the optical properties of light appearing from a magnetic fluid in a magnetic field without the need to find a large prime number. have.

Another effect of the present invention according to the above configuration is that the diversity and stability of the generated code can be secured in that the polarization direction in the magnetic fluid, which is a polarizing filter, can be flexibly adjusted according to the direction of the magnetic field applied to it. have.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a block diagram of an encryption and decryption apparatus using a polarization phenomenon of light occurring in a magnetic fluid according to an embodiment of the present invention.
2 is a perspective view of an interferometer unit configured with a Mach-Zehnder interferometer according to an embodiment of the present invention.
3 is a flowchart illustrating a method of encryption and decryption using a polarization phenomenon of light occurring in a magnetic fluid according to an embodiment of the present invention.
4 is a flowchart of a method of imageizing a sentence to be encrypted according to an embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be implemented in various different forms, and therefore is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be "connected (connected, contacted, bonded)" with another part, it is not only "directly connected", but also "indirectly connected" with another member in the middle. "Including the case. In addition, when a part "includes" a certain component, this means that other components may be further provided, not excluding other components, unless specifically stated to the contrary.

The terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present specification, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof does not preclude in advance.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Among the existing public key cryptography methods, the most widely used public key cryptosystem is RSA cryptography, and the stability of the RSA cryptosystem is based on the fact that prime factorization is difficult in a very large number of cases.

However, in the existing RSA encryption system, there is a problem that the process of generating the required password is too complicated because it is necessary to find a very large prime number of targets. In addition, if an algorithm that can facilitate prime factorization of even a very large prime number appears in the future, the security of the RSA cryptosystem may be easily broken.

Accordingly, the present invention proposes a technique for generating a code more easily using optical properties of light without the need to find a large prime number by applying a polarization filter using a magnetic fluid in a magnetic field.

Due to the characteristic of the magnetic fluid that forms a peculiar shape near the magnet and is attracted by the magnet, it is easy to see the introduction of the magnetic fluid as a novel phenomenon in various media media. Magnetic fluids, so-called liquid magnets, simply refer to liquids that are strongly magnetized in the presence of a magnetic field.

Fundamentally, a magnetic fluid is a liquid prepared in a colloidal form by dissolving very small ferromagnetic particles such as iron oxide nanoparticles in a solvent such as water or ethanol. Therefore, the magnetism of the ferromagnetic material is attracted to the magnet near the magnet, and the ferromagnetic particles also have a special arrangement according to the magnetic field.

More specifically, the magnetic fluid is coated with an unsaturated fatty acid on the surface of magnetite, manganese ferrite, nickel ferrite, cobalt ferrite, barium ferrite, iron, nickel and strong ferromagnetic nanoparticles with a diameter of 10 nm to 20 nm, and then water, oil or aliphatic It is a colloidal liquid dispersed in a solvent such as hydrocarbon or aromatic hydrocarbon. Each of the ferromagnetic nanoparticles is completely coated with a surfactant, so that aggregation or precipitation does not occur.

When the magnetic fluid is placed under a magnetic field due to the arrangement-related characteristics of the ferromagnetic particles, light incident on the magnetic fluid causes diffraction and polarization patterns due to optical properties. Based on these optical properties, an encryption technique using a polarization filter including a magnetic fluid will be described below according to an embodiment of the present invention.

1 is a block diagram of a character encoding apparatus having a polarization filter to which a magnetic fluid polarization phenomenon is applied according to an embodiment of the present invention.

An encryption device according to an embodiment of the present invention includes an encryption transmission unit 100 for emitting a first encrypted image as light; A polarization filter unit 200 that generates a polarization phenomenon on the light emitted from the encryption transmission unit 100 and performs second encryption; And it may be characterized in that it comprises a cipher receiving unit 300 for receiving the second-order encrypted light from the polarization filter unit 200.

The image emitted by the encryption transmitting unit 100 as light corresponds to an image obtained by converting a sentence that is an object of encryption into a number and converting it into a figure, and the first encryption method will be described later.

When the encryption transmission unit 100 emits a first-order encrypted image to be encrypted, as the light enters the polarization filter, a polarization phenomenon occurs due to the optical property of the light, and the polarized light Light is received by the encryption receiver 300. Through this, the user can perform the second encryption on the first encrypted image.

According to an embodiment of the present invention, the polarization filter unit 200 dissolves ferromagnetic particles having a special arrangement in a solvent under a magnetic field, and when current is supplied to the magnetic fluid 210 manufactured in a colloidal form and a conductor, the periphery of the conductor It may include an electromagnet 220 that forms a magnetic field in.

Since the magnetic fluid 210 is essentially a colloidal liquid, incident light is scattered when light is emitted. Therefore, the Tyndall phenomenon occurs due to the scattering of light, and the path of light is often seen. If a magnetic field is applied, the ferromagnetic particles are arranged in a certain direction, thereby forming a path through which light is not scattered and can go straight.

However, since the spacing between the nanoparticles is very small, it acts like a slit, causing a diffraction phenomenon of light, and accordingly, a diffraction pattern is observed. In addition, according to the arrangement of the nanoparticles, polarization of light can be observed like a polarizing film.

The electromagnet 220 serves to provide a magnetic field that affects the magnetic fluid 210. The brightness of the diffraction pattern of light is changed by polarization according to the direction of the magnetic field acting on the magnetic fluid 210 by the electromagnet 220.

Accordingly, an embodiment of the present invention may be characterized in that it is possible to fluidly adjust the polarization direction occurring in the magnetic fluid 210 according to the direction of the magnetic field applied to the magnetic fluid 210 by the electromagnet 220. have.

The significance of the feature of being able to flexibly adjust the polarization direction lies in the diversity of cryptography. Since angle is a range of real numbers, hackers trying to solve the generated password will have to fit the angle with an infinite number of ancestors in real units without any other principle. However, this is practically impossible unless the hacker has sufficient experimental apparatus according to an embodiment of the present invention.

On the other hand, in the case of a person equipped with an experimental device according to an embodiment of the present invention, the password can be immediately decrypted. In addition, in the case of the magnetic fluid 210, when a magnetic field of a certain size or more is applied, the arrangement of ferromagnetic particles becomes constant, so that the intensity of light due to polarization becomes constant, according to an embodiment of the present invention within a strong and uniform magnetic field. The password generated accordingly will be more stable.

Therefore, the electromagnet 220 must be able to freely adjust the polarization direction of light, and for this purpose, the electromagnet 220 generates a magnetic field sufficient to affect the arrangement of the ferromagnetic particles in the magnetic fluid 210. It must be provided regularly.

According to an embodiment of the present invention, the electromagnet 220 includes a circular solenoid formed by winding a conductor through which current can flow in a tightly and uniformly cylindrical shape, and a power source supplying current to the conductor. can do.

As a result of the actual experiment, when the electromagnet 220 is a neodymium magnet and the neodymium magnet is attached to the upper lid and the lower bottom of the vial filled with the magnetic fluid 210, the magnetic fluid 210 Even if light is passed, diffraction and polarization of light do not appear when the concentration of the magnetic fluid 210 is high.

Thus, a diluent may be prepared to additionally dilute the concentration of the magnetic fluid 210, but in this case, since the solute may not be dissolved uniformly in a colloidal form, when the neodymium magnet comes close, the magnetic field acts very strongly. The stock solution of the magnetic fluid 210 is separated as it is.

In order to allow a relatively constant and uniform magnetic field to be applied to the magnetic fluid 210 according to this experimental example, the electromagnet 220 is formed of a circular coil with a conductor through which current can flow rather than the neodymium magnet. It could be done in the form of a solenoid.

However, when the conductor wire of the circular solenoid is wound with a copper wire, since the copper wire does not have a covering on the surface, the current flows in a straight line. This is not a circular coil, but a straight wire, so that a magnetic field is not formed in a desired direction, so there is a limit in allowing a uniform and constant magnetic field to act on the magnetic fluid 210 as described above.

Accordingly, according to an embodiment of the present invention, the circular solenoid conductor may be wound with an enameled wire to form a customized solenoid. The surface of the conductive wire may be wound using the enameled wire with a covering, and the end of the conductive wire may be configured such that the covering of the enameled wire is peeled off so that current can flow.

In fact, in the case of a solenoid applied with a copper wire, the difference between the magnetic field inside and outside the solenoid was small, and the value of the magnetic field was also found to be very small. In contrast, in the case of a solenoid to which an enamel wire is applied, the difference in the magnetic field inside and outside the solenoid is large, and the value of the magnetic field appears to be very large and constant.

However, theoretically, as the number of windings of the enamel wire increases, the long-term length of the circular solenoid coil increases, but in practical experiment, the resistance increases as the number of turns of the enamel wire increases, so that the maximum current flowing decreases. Therefore, it will be necessary to adjust the appropriate number of turns of the enamel wire through repetition of the experiment.

Another embodiment of the present invention may further include an interferometer unit 400, and as shown in FIG. 2, the interferometer unit 400 is configured in the form of a Mach-Zehnder interferometer to implement a more systematic polarization encryption system. I can.

In this case, the interferometer unit 400 may be characterized in that it receives the light incident on the polarization filter unit 200 to generate a polarization phenomenon.

The Mach-Zehnder interferometer is a kind of two-beam interferometer, which is an important interferometer for measurement, and can be composed of two mirrors and two translucent winter beam splitters. By further installing the interferometer unit 400, the light polarized through the beam slitter can be divided into two paths to perform encryption or decryption.

More specifically, the interferometer unit 400 is a first beam splitter 410 through which light emitted from the emission unit is incident, reflects a part of the incident light, and transmits the rest of the incident light that is not reflected. ; A first mirror 430 located at a location where the light reflected from the first beam splitter 410 reaches, and reflecting the light reflected from the first beam splitter 410; A second mirror 440 located at a location where the light transmitted from the first beam splitter 410 reaches, and reflecting the light transmitted from the first beam splitter 410; And the light reflected from the first mirror 430 and the light reflected from the second mirror 440 reach together, so that the light reflected from the first mirror 430 is transmitted, and the second It may be characterized in that it includes a second beam splitter 420 that reflects the light reflected from the mirror 440.

When the interferometer unit 400 is configured as a Mach-Zehnder interferometer as described above, the image is encoded using linear polarization and phase information of the image, and two polarization components orthogonal to the encrypted image and the phase of the key image. A method of reconstructing an image using information may be proposed.

There is a problem that the pixels of the image encryption using the phase component and the polarization characteristic all have the same intensity distribution and have an arbitrary polarization state, so that it is impossible to replicate, but when the present invention is applied, the magnetic field of the magnetic fluid 210 By using the property that the polarization direction is fluid, it is possible to apply a method that allows polarization in an arbitrary range of real numbers.

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As shown in the method flow chart shown in FIG. 3, an embodiment of the present invention may be a sentence encryption method to which a sentence encryption device having a polarization filter using the polarization phenomenon of the magnetic fluid 210 is applied. In case, the sentence encryption apparatus is characterized in that the sentence encryption apparatus according to an embodiment of the present invention described above.

More specifically, the step of imageizing a sentence that is an object of encryption; Emitting the image as light by the encryption transmission unit 100; Incident light emitted from the encryption transmission unit 100 to the polarization filter unit 200; Generating a polarization phenomenon on the light incident on the polarization filter unit 200; And entering the light on which the polarization phenomenon has occurred to the encryption receiver 300, which is a method of encrypting a sentence to which a sentence encryption device having a polarization filter to which the polarization phenomenon of the magnetic fluid 210 is applied is applied. It can be characterized by that.

As described above, the encryption technology according to an embodiment of the present invention uses a polarization filter using the magnetic fluid 210 for first-order encryption that draws a text to be encrypted and an image according to the first-order encryption. The second encryption is performed through encryption again.

More specifically, as shown in the method flow chart shown in FIG. 4, the first encryption step of imageizing a sentence subject to the encryption includes: encrypting the sentence subject to the encryption using a binary number; Filling the number converted by the binary method into a square matrix of 2ⁿⅹ2ⁿ; And forming the image by filling a portion of the square matrix with a number of 1 with black color and a portion of the square matrix with a number of 0 with white.

The first encryption process may be performed through an arbitrary process of converting a character string to be encrypted into a string of numbers, and converting it into an image through a square matrix.

However, in the case of applying an encryption method based on the principle of Hill encryption rather than simply replacing one letter with another letter, two or more letters are replaced with other letters at the same time. Accordingly, unlike a simple replacement cipher that is easily decrypted by frequency analysis, a cipher consisting of unique features of the Hill cipher is not easily decrypted by frequency analysis.

Hereinafter, for convenience of understanding the first encryption process based on the heel cipher, a sentence composed of alphabets will be described as an example. If numbers are assigned to each alphabet in order, numbers 1 to 26 from alphabets A to Z respectively correspond. Receives a sentence that is the target of the password as a string and converts it into a corresponding number, and converts the representation of the converted number to binary.

Thereafter, a first column matrix (a matrix of k×1) is formed by grouping k random numbers converted by the binary method, and based on the principle of the above-described Hill cipher, a k×k matrix is formed as an encryption key matrix, where each element is an integer. Specify the square matrix. In this case, the remaining part of the last division will be able to add numbers at random.

When the encryption key kxk matrix is multiplied by the converted first column matrix, another second column matrix is obtained. Accordingly, when a residual operation (mod) is performed with 26, which is the total number of alphabets, which is the target number in the number sequence shown in the second column matrix, the number sequence shown in the second column matrix is a numeric sequence consisting of the remaining numbers divided by 26, respectively. Becomes.

Thereafter, the number sequence shown in the second column matrix is converted into a binary system, and then converted into a form in which 0 is added after the number of digits expressed in the binary system. For example, the number 5 in the decimal system becomes 101 when expressed in the binary system, and it is converted to 101000 when three 0s are added as many as the number of digits.

Thereafter, the above process is carried out to convert the converted number to the remainder obtained by dividing the number by dividing the number by two. Through this process, the sentence that is the target of encryption is converted into an encrypted string of numbers.

A 2ⁿⅹ2ⁿ square matrix having a minimum size to form the encrypted number sequence is constructed, and the 2ⁿⅹ2ⁿ square matrix is filled with the encrypted number column. The blanks of the square matrix of 2ⁿⅹ2ⁿ may be filled with 0 or 1 according to an arbitrary regularity.

Accordingly, for the 2ⁿⅹ2ⁿ square matrix filled with the encrypted number string and composed of 0s and 1s, the part composed of the number 1 is filled with black color, and the part composed of the number 0 is filled with white color. The number sequence is converted to the first encrypted picture.

The first encryption process based on the Hill cipher can be accomplished more easily by creating a program through coding through the algorithm for the above-described process through Python or the like.

By emitting the first encrypted picture to the polarization filter unit 200 by the encryption transmitting unit 100, the first encrypted picture is secondly encrypted, and the second encrypted light is transmitted to the encryption receiving unit. 300 will receive.

Accordingly, in the case of a sentence encrypted twice according to the application of the present invention, third parties other than the user cannot interpret the encrypted sentence and cannot decrypt the sentence, but the user can easily decrypt the encrypted sentence. There is an advantage that it can be decrypted.

Since the polarization filter unit 200 is composed of the magnetic fluid 210, the polarization direction of the incident light can be flexibly adjusted by freely applying the direction of the magnetic field. For this reason, it is possible to ensure diversity and stability of generated ciphers in the case of applying an embodiment of the present invention.

In addition, when the present invention is applied, since the ciphertext is divided and encrypted from the beginning, even if there is a problem in resolution, there is an advantage that it can be properly decrypted except for the vicinity of the misread portion due to the problem of resolution.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that other specific forms can be easily modified without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative and non-limiting in all respects. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

100: encryption transmitter:
200: polarization filter unit
210: magnetic fluid
220: electromagnet
300: password receiver
400: interferometer
410: first beam splitter
420: second beam splitter
430: first mirror
440: second mirror

Claims (14)

An encryption transmission unit for converting a sentence to be encrypted into a number and then emitting a first encrypted image, which is an image converted into a picture form, as light;
A polarization filter unit in which the light emitted from the encryption transmission unit is incident and second-order encryption is performed by a polarization phenomenon; And
Including an encryption receiving unit for receiving the second-order encrypted light from the polarization filter unit,
The polarization filter unit,
A magnetic fluid prepared by dissolving ferromagnetic particles having a special arrangement in a solvent in a colloidal form under a magnetic field; And
When a current is supplied to a conductor, a magnetic field is formed around the conductor, and an electromagnet capable of fluidly adjusting a polarization direction of light incident on the polarization filter unit according to the direction of the magnetic field,
The electromagnet,
A circular solenoid made by winding a wire into a compact and uniformly cylindrical shape; And
Including a power source supplying current to the conductor,
The circular solenoid is configured such that the enamel wire with a covering winds the surface of the conductor wire, but the end of the conductor wire is configured such that the covering of the enamel wire is removed so that current can flow,
The first encrypted image converts the sentence to be encrypted into a binary number,
In the first encryption, a number from 1 to 26 is assigned to each of the 26 alphabets from A to Z in order, and the sentence to be encrypted is received as a string and converted into a corresponding number, and the conversion Convert the notation of the numbered number to binary method, and form a first column matrix (a matrix of kx 1) by grouping k random numbers converted to the binary method to form a square where each random element consisting of a kxk matrix, which is an encryption key matrix, is an integer It is designated as a matrix, and the number columns shown in the second column matrix multiplied by the kxk matrix and the first column matrix are each composed of the remaining numbers divided by 26, and after converting the number columns shown in the second column matrix into binary method , By converting the converted number to the remainder of dividing the number by dividing the number by 2 for the number converted in the form of adding 0 after the number as much as the number of digits expressed in binary system, the sentence to be encrypted is converted into an encrypted number string. ,
The first encrypted image is composed of a 2ⁿⅹ2ⁿ square composed of numbers converted by the binary method, the part composed of the number 1 in the square of 2ⁿⅹ2ⁿ is filled in black, and the part composed of the number 0 in the square matrix of 2ⁿⅹ2ⁿ Is filled with white to form the first encrypted image,
The electromagnet improves the diversity and stability of the encrypted sentence generated through the first encryption and the second encryption by providing a magnetic field of the same size to the magnetic fluid so that the arrangement of the ferromagnetic particles is constant,
Accordingly, the text to be encrypted is encrypted through the first encryption as a picture and the second encryption in which the image according to the first encryption is re-encrypted through a polarization filter using the magnetic fluid,
By applying a polarization filter using the magnetic fluid in the magnetic field to generate a password using the optical properties of light,
When the encryption receiver emits the first-order encrypted image to be encrypted, as the light enters the polarization filter, a polarization phenomenon occurs due to optical properties of the light,
As the encryption receiver receives the light polarized by the polarization filter, the second encryption is performed on the first encrypted image,
Light appearing in a magnetic fluid, characterized in that it is possible to decrypt the text subject to encryption, excluding a portion that is incorrectly read due to the resolution problem, even if a problem occurs in resolution as the sentence to be encrypted is divided and encrypted. Encryption and decryption device using polarization phenomenon.
delete delete delete The method of claim 1,
Further comprising an interferometer,
The interferometer unit consists of a Mach-Zehnder interferometer, and receives the polarized light from the polarization filter unit.
delete The method of claim 5,
The interferometer unit
A first beam splitter that reflects some of the light incident from the polarization filter unit and transmits the rest of the incident light that is not reflected;
A first mirror positioned at a location where light reflected from the first beam splitter reaches, and reflecting light reflected from the first beam splitter;
A second mirror positioned at a location where light transmitted from the first beam splitter reaches, and reflecting light transmitted from the first beam splitter; And
The second is located at a place where the light reflected from the first mirror and the light reflected from the second mirror reach together, transmits the light reflected from the first mirror, and reflects the light reflected from the second mirror An encryption and decryption apparatus using a polarization phenomenon of light appearing in a magnetic fluid, comprising a beam splitter.
delete delete delete delete The method of claim 10,
The interferometer unit
A first beam splitter that reflects some of the light incident from the polarization filter unit and transmits the rest of the incident light that is not reflected;
A first mirror positioned at a location where light reflected from the first beam splitter reaches, and reflecting light reflected from the first beam splitter;
A second mirror positioned at a location where light transmitted from the first beam splitter reaches, and reflecting light transmitted from the first beam splitter; And
The second is located at a place where the light reflected from the first mirror and the light reflected from the second mirror reach together, transmits the light reflected from the first mirror, and reflects the light reflected from the second mirror An encryption and decryption apparatus using a polarization phenomenon of light appearing in a magnetic fluid, comprising a beam splitter.
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