KR100396825B1 - Encryption/decryption apparatus, system and method using the base element of pixel - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to an encryption / decryption apparatus using the basic elements of a pixel, a method thereof, an encryption / decryption system using the same, and a computer-readable recording medium having recorded thereon a program for implementing the methods.

2. The technical problem to be solved by the invention

The present invention is a computer-readable recording device that encrypts input information into basic elements of a pixel and then puzzles and multi-levels encryption by irregularly changing colors and positions, and a method and a program for realizing the method. A computer-readable recording apparatus providing a medium and easily recognizing a forgery by restoring encrypted information in real time using the basic elements of a pixel, and a method thereof and a program for realizing the method. The present invention also provides a medium, and an encryption / decryption system in which the encryption device, the method and the decryption device, and the method are interoperated with each other, and a computer-readable recording medium having recorded thereon a program for realizing the method. There is a purpose.

3. Summary of Solution to Invention

The present invention comprises a first step of receiving information for encryption; A second step of generating a random number map; A third step of decomposing the encryption target information into units of basic elements of the pixel; Encrypting a basic element of the decomposed pixel; And a fifth step of outputting the encrypted information.

4. Important uses of the invention

The present invention is used for encryption and decryption.

Description

Encryption / decryption apparatus and method using the basic elements of the pixel and the encryption and decryption system and the method using the same {Encryption / decryption apparatus, system and method using the base element of pixel}

The present invention relates to an encryption / decryption apparatus using the basic elements of a pixel, a method thereof, and an encryption / decryption system using the same, and a computer-readable recording medium having recorded thereon a program for implementing the methods. It is impossible to decrypt without using a dedicated decryption device by decomposing the image into the basic elements of the pixel by using a unique security code, an encryption key code managed by the institution, a proven high-visibility encryption algorithm and a random number algorithm. And an encryption / decryption apparatus and method thereof, an encryption / decryption system using the same, and a program for realizing the methods, which can obtain a concealment effect due to optical illusion by applying an encrypted image as a background image of specific information. The present invention relates to a computer-readable recording medium.

First, look at the term "basic elements of the pixel" used in the present invention.

Practically the most common hardware reference models are the RGB (Triple Red, Green, Blue) models for color monitors and many kinds of color video cameras, CMY (Cyan, Magenta, Yellow), CMYK (Cyan, Magenta, Yellow, black) model, YIQ (luminance, imphase, quadrature) model, standard for color TV broadcasting, HSI (color, saturation, brightness) model, HSV (color, saturation, value) ) Models. And, the above models can be converted by the mutual conversion formula.

Therefore, in the present invention, each of RGB, CMY, CMYK, YIQ, HSI, HSV, etc., which are the constituent units of the pixel, will be defined and used as the "basic element of the pixel". Hereinafter, the RGB model will be described as an example.

In general, forgery is used for international terrorism, drug smuggling, smuggling, etc., and forgery of various types of crimes such as employment of minors, real estate fraud, and forgery of criminals, serious national and social damage. In addition, the seal of bank account or signature of credit card is printed and exposed as it is, so when it is lost or stolen, it is not difficult to falsify it even if you are not an expert, resulting in various financial accidents such as deposit fraud. Done. In addition, the case of holograms used for credit cards, gift certificates and trademarks of department stores is already frequent.

As a conventional anti-counterfeiting method, various special printing techniques such as fluorescence, optical interference pattern, fine letters, intaglio, silver wire, and silver are applied in combination, but the forgery problem is serious enough to be called the history of the war against counterfeiters. Remains. For this reason, many countries devote a lot of human and material resources every year to prevent counterfeiting.

Until now, precision printing techniques using special materials such as barcodes, holograms, silver coins, and fine characters have been used as anti-counterfeiting means for printed materials. However, in the case of special printing, forgery may be difficult simply, but forgery cannot be prevented fundamentally. Because with the rapid development of color copier and computer technology, counterfeit technology by professional counterfeit organization also evolves skillfully.

The development of such counterfeit technology is also a problem, but the other reason why counterfeit crimes are endless is that the general public cannot easily determine whether or not to forge. Given the fact that counterfeiting is being carried out in view of the lack of knowledge or attention that ordinary people can easily determine the authenticity, the problem can be solved if there is a method for anyone to easily identify the forgery.

The basic concept and method for the image information security system has been filed by the present applicant (Korean Patent Application No. 1999-2625). The previously disclosed invention encrypts by simply increasing the number in the case of rearrangement by dividing the image into fine pieces and rearranging the positions according to a given security code. Although the method takes a long time to solve with the present computer, the time will be shortened by the current computer development trend. In this regard, as a method of enhancing the security level, the present applicant has also filed an application for an image data encryption method and a supporting device (Korean Patent Application No. 2000-66708). In the above-described invention, the fragment of the image is subdivided into pixel units constituting the image, and a method of inverting the color of the pixel is used in order to make back estimation difficult. Although the above-described invention has a very high degree of security at present, in order to further enhance the degree of security, the granularity of the processing unit is required and the application of a deep encryption technique (steganography) is required.

Accordingly, the present inventors have invented a new encryption method that applies a high-visibility algorithm, a multi-level encryption process, and a deep encryption technique that are inconspicuous while the processing unit is a basic element unit of the pixel, unlike the conventional methods. The inventors have invented an encryption (issuance) device that prevents forgery by employing a new encryption method, and a practical decryption (decryption) device that can be easily inquired by non-experts.

The present invention has been proposed to solve the above problems, and an encryption device and method for realizing the method and the method for realizing the encryption method by decomposing the input information into the basic elements of the pixel and then changing the position irregularly. Its purpose is to provide a computer-readable recording medium having recorded thereon.

In addition, the present invention provides an encryption apparatus and method for realizing the method and the method for realizing the above method by decomposing the input information into the basic elements of the pixel and mapping it to the gradation map and making puzzles to change the color and position irregularly. Its purpose is to provide a computer-readable recording medium having recorded thereon.

In addition, the present invention, an individual security code, an encryption key code managed by the institution, a high-cost encryption algorithm and random number algorithm proved to be safe, and an encryption device using a stepwise map and a method and a program for realizing the method Its purpose is to provide a computer readable recording medium having recorded thereon.

It is also an object of the present invention to provide an image information encryption apparatus using an optical illusion concealment method, a method and a computer readable recording medium having recorded thereon a program for realizing the method.

It is also an object of the present invention to provide an image information encrypting apparatus which cannot be forged by a third party other than the relevant institution, and a method and a computer readable recording medium having recorded thereon a program for realizing the method.

On the other hand, the present invention, a decryption apparatus that can easily determine whether the forgery by restoring the encrypted information using the basic elements of the pixel in real time, and a computer-readable recording recording the method and a program for realizing the method There is another purpose in providing the medium.

On the other hand, the present invention provides an encryption / decryption system in which the encryption device and the method and the decryption device and the method are linked to each other, and a computer-readable recording medium having recorded thereon a program for realizing the method and the method. There is another purpose.

1A is a diagram showing arbitrary image information consisting of R (Red), G (Green), B (Blue), and W (White) of pure color according to the present invention divided into pixels.

1B is an illustration of a red channel, the first element being decomposed in accordance with the present invention.

1C is an illustration of a Green Channel, the second element that is decomposed in accordance with the present invention.

1D is a diagram illustrating a blue channel, which is a third element decomposed according to the present invention.

FIG. 1E illustrates a red channel as the first element of the puzzle, according to the present invention. FIG.

FIG. 1F illustrates a Green Channel, the second fundamental element puzzled in accordance with the present invention. FIG.

FIG. 1G illustrates a blue channel, the third fundamental element puzzled in accordance with the present invention. FIG.

FIG. 1H is a diagram illustrating a red channel, which is the first basic element mapped to a phase map in accordance with the present invention; FIG.

FIG. 1I is an illustration of a Green Channel, the second fundamental element mapped to a phase map in accordance with the present invention. FIG.

FIG. 1J is a diagram illustrating a blue channel, which is the third basic element mapped to a phase map in accordance with the present invention. FIG.

1K illustrates an image puzzled after placing the basic elements in accordance with the present invention.

FIG. 1L is a view showing an image obtained by converting a decomposition-combined basic element in pixel units according to the present invention.

1M is a view showing an image overlaid with specific data called "information" as a background image with the encrypted image of FIG. 1K as an application for obtaining a concealment effect by optical illusion according to the present invention; FIG.

FIG. 1N is a view showing an image overlaid with specific data "above" with the encrypted image of FIG. 1L as a background image in an application for obtaining a concealment effect by optical illusion according to the present invention; FIG.

2 is a block diagram of an embodiment of an encryption apparatus using the basic elements of a pixel according to the present invention.

3 is a block diagram of an embodiment of a decoding apparatus using the basic elements of a pixel according to the present invention;

4 is a flowchart illustrating an embodiment of an encryption method using the basic elements of a pixel according to the present invention;

5A-5G are flow diagrams of a number of embodiments of the process of multi-step encryption of the basic elements of the pixel of FIG.

6 is a flowchart illustrating an embodiment of a decoding method using the basic elements of a pixel according to the present invention;

7A to 7G are flow charts of a number of embodiments of the process of multi-step decoding the basic elements of the pixel of FIG.

* Explanation of symbols for the main parts of the drawings

p: first pixel 1: first basic element

2: 2nd basic element 3: 3rd basic element

21,31: Image input section 22,32: Security code input section

23,33: central processing unit 24,34: image storage unit

25: image printing unit 26, 35: screen display unit

An encryption method of the present invention for achieving the above object, the encryption method applied to the encryption device using the basic elements of the pixel, the first step of receiving information for encryption; A second step of generating a random number map; A third step of decomposing the encryption target information into units of basic elements of the pixel; Encrypting a basic element of the decomposed pixel; And a fifth step of outputting the encrypted information.

In addition, the encryption apparatus of the present invention, the encryption apparatus using the basic elements of the pixel, comprising: input means for receiving information for encryption; Security code input means for receiving a security code; Encrypting means for encrypting the position of the basic element of the decomposed pixel after decomposing the information for encryption received through the input means into a basic element of the pixel; Storage means for storing information according to the encryption process; And output means for outputting the encrypted information.

On the other hand, the decryption method of the present invention for achieving the above object, the decryption method applied to the decryption apparatus using the basic elements of the pixel, comprising: a first step of receiving encrypted information; Obtaining a security code for decrypting the encrypted information; Generating a random number map; A fourth step of processing and encrypting the encrypted information in units of basic elements of a pixel; A fifth step of restoring original information by combining basic elements of the decoded pixel; And a sixth step of outputting the restored original information.

In addition, the decryption apparatus of the present invention, the decryption apparatus using the basic elements of the pixel, the input unit for receiving encrypted information; Security code obtaining means for obtaining a security code; Decrypting means for restoring original information by combining the basic elements of the decrypted pixels after decrypting the basic elements of the pixels for the encrypted information received through the input means; Storage means for storing information according to the decoding process; And output means for outputting the restored original information.

On the other hand, the encryption and decryption method of the present invention for achieving the another object, the encryption and decryption method applied to the encryption and decryption apparatus using the basic elements of the pixel, comprising: a first step of receiving information for encryption; Generating a random number map for encryption; A third step of decomposing the encryption target information into units of basic elements of the pixel; A fourth step of multi-step encrypting the basic elements of the decomposed pixel; A fifth step of outputting the encrypted information; A sixth step of receiving encrypted information; A seventh step of obtaining a security code for decrypting the encrypted information; An eighth step of generating a random number map for decoding; A ninth step of processing the encrypted information in units of basic elements of a pixel and performing multi-step decryption; A tenth step of combining original elements of the decoded pixel to restore original information; And an eleventh step of outputting the restored original information.

In addition, the encryption and decryption apparatus of the present invention, the encryption and decryption apparatus using the basic elements of the pixel, comprising: input means for receiving the information for encryption and the encrypted information; Security code input means for receiving a security code for encryption; After decomposing the information for encryption received through the input means into the basic element of the pixel, the position of the basic element of the decomposed pixel is changed by using a random number map and the color of the basic element of the pixel is changed by using the gradation map. Multi-step encryption means for multi-step encryption by means of; Security code obtaining means for obtaining a security code for decryption; After inverting the position of the basic element of the pixel with respect to the encrypted information input through the input means by using a random number map and inversely changing the color of the basic element of the pixel by using the gradation map, the multi-step decryption is performed. Multi-stage decoding means for restoring original information by combining the basic elements of the pixels; Storage means for storing information according to the multi-step encryption process and information according to the multi-step decryption process; And output means for outputting the multi-level encrypted information and the restored original information.

On the other hand, the present invention, in order to encrypt using the basic elements of the pixel, an encryption device having a processor, the first function for receiving information for encryption; A second function of generating a random number map; A third function of decomposing encryption target information into units of basic elements of a pixel; A fourth function of encrypting the basic elements of the decomposed pixel; And a computer readable recording medium having recorded thereon a program for realizing a fifth function of outputting the encrypted information.

The present invention also provides a decryption apparatus having a processor for decrypting using a basic element of a pixel, comprising: a first function of receiving encrypted information; A second function of obtaining a security code for decrypting the encrypted information; A third function of generating a random number map; A fourth function of processing and encrypting the encrypted information in units of basic elements of a pixel; A fifth function of restoring original information by combining basic elements of the decoded pixel; And a computer readable recording medium having recorded thereon a program for realizing a sixth function of outputting the restored original information.

In addition, the present invention, in order to encrypt and decrypt using the basic elements of the pixel, a decryption apparatus having a processor, a first function for receiving information for encryption; A second function of generating a random number map for encryption; A third function of decomposing encryption target information into units of basic elements of a pixel; A fourth function of multi-level encryption of the element of the decomposed pixel; A fifth function of outputting the encrypted information; A sixth function of receiving encrypted information; A seventh function of obtaining a security code for decrypting the encrypted information; An eighth function of generating a random number map for decoding; A ninth function of processing the encrypted information in units of basic elements of a pixel and performing multi-step decryption; A tenth function of restoring original information by combining basic elements of the decoded pixel; And a computer readable recording medium having recorded thereon a program for realizing the eleventh function of outputting the restored original information.

As described above, the apparatus for implementing the encryption / decryption method according to the present invention is implemented as an issuing apparatus (encryption apparatus) to which an anti-counterfeiting technique is applied, and a decryption apparatus (decryption apparatus) capable of determining whether or not to forge.

The issuing device is applied with the encryption method and the hacking prevention technology which can most effectively protect the image information of the limited space area such as the photo, signature, seal, unique pattern, etc., which are the objects of forgery.

The encryption method employs a unique security code, an encryption key code managed by an institution, and a high-proven encryption algorithm and a random number algorithm that have proven safety, thereby preventing the possibility of forgery in a double or a triple. In particular, in order to prevent decoding by reasoning techniques, etc., the puzzle is decomposed into the basic element units of pixels, and then randomized into puzzles and rearranged according to a random number algorithm. Includes anger process.

Here, one-step encryption is also possible in the process of puzzle-forming the basic elements of the pixel. That is, the process of mapping to the leveling map and the repuzzle process are additional elements. In the following description, all of the multi-level encryption and decryption will be described as an example, but the technical gist that one-step encryption is possible can be equally applied to the following embodiments.

As described above, the present invention changes image information for each basic element unit of the pixel according to a random number algorithm and an encryption algorithm, thereby making it impossible to decipher it without using a dedicated decoding device, and forgery of identification cards, cards, bills, and bank accounts. . In addition, it is possible to create an encrypted image with a gradation or multiple gradations, and in particular, by making a cryptic image with a gradation level so that the encrypted image can be applied as a background image so that it is not noticeable, and the hidden effect is increased. By restoring the image using a multi-step image processing technique, a stable restoration is possible.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the technical gist of the present invention will be described with reference to FIGS. 1A to 1N.

The encryption method according to the present invention largely includes a preprocessing process, a multi-step encryption process, a post-processing process.

The first preprocessing process includes an input process and a normalization process.

The input process refers to a process of receiving information, such as an analog image or text, through an image input unit, converting the information into digital information, or transferring information, which has been digitized and stored in a database, to an encryption device. In this case, an input device such as a camera or a scanner may be used as the image input unit, and the database means that image information is stored in a specific form using an image input unit. The input image goes through a normalization process and goes to a multi-level encryption process.

The normalization process adjusts color and size. Since the image received through the image input unit except the digital image stored in the database is information that changes from analog to digital, the color is adjusted to keep the original image as close as possible to the original image. In order to reduce the data loss of the input image as much as possible, the size is adjusted in consideration of correlation with neighboring pixels in order to obtain an image close to the original image.

The second multi-level encryption process includes a pixel decomposition process, a puzzle process, and a phase map mapping process. This will be described later in detail.

The third post-process is a process of outputting an encrypted image, which is output as digital information or printed on printing paper depending on the application target. At this time, since the printed output is output in a completely different form from the original image, it is impossible to find the original image in this state. For example, if a picture or personal information of a passport or resident registration card is encrypted (yellow gradation), it is output in yellow without any form. Therefore, if the background of the passport or the like is yellow, a concealment effect can be obtained. In addition, even if the text information and the like are overlaid and output on the background position where the encrypted image is output, it acts as a slight noise during decryption, but is hardly affected by restoring the original image.

Next, a detailed technical gist of the encryption method according to the present invention will be described.

The encryption method according to the present invention is a process of generating a random number map, decomposing information into basic elements of a pixel, puzzles the basic elements of a pixel using a random number map, and generating a stepwise map to generate basic elements of a pixel. The process of mapping onto a stepwise map, repositioning the basic elements of the pixel and repuzzle using a random number map, converting the basic elements of the pixel into pixel units, and the like.

Here, the process of converting the basic elements of the pixel into pixel units and the process of repuzzle using the random number map after arranging the basic elements of the pixels are additional elements, not essential elements of the present invention. In the process of generating a gradation map to map the basic elements of the pixel to the gradation map, the case where the basic elements of the pixel are mapped to the gradation map has been described. However, the basic element of the pixel is not a gradation map but a gradation map or a multi gradation map. Can also be mapped to.

The process of decomposing the information into the basic elements of the pixel is a process used to increase the security of the encrypted image, and is a process of decomposing the image input by the image input unit into the basic element units of the pixel.

Referring to FIGS. 1A to 1D, FIG. 1A illustrates arbitrary image information including R (Red), G (Green), B (Blue), and W (White) of pure colors according to the present invention in pixel units. 1B shows a red channel, which is a pixel-decomposed first element, according to the present invention, and FIG. 1C shows a green channel, which is a second element, pixel-decomposed according to the present invention. 1D illustrates a blue channel, which is a pixel-decomposed third element, according to the present invention. As such, the first pixel p of FIG. 1A is decomposed into a first basic element 1 of FIG. 1B, a second basic element 2 of FIG. 1C, and a third basic element 3 of FIG. 1D.

The random number map may be generated by using a random number generator or by using a random number generator and a random number map generator. In this case, the random number generator may use various algorithms (eg, DES, SEED, etc.). The random number map is for processing two-step encryption and decryption, and after recombining six pieces (the number of basic elements x two steps) necessary for the first puzzle (primary encryption) and the basic element unit and repuzzle (the third encryption) A total of seven are generated, including one needed for.

Here, the former six random number maps are used to puzzle (primary encryption) the basic elements of the pixel as shown in Figs. 1E to 1G, and the latter one random number map is the pixel as shown in Fig. 1M. Used to repuzzle (tertiary encryption) the basic elements of.

On the other hand, when the re-pulsation process as an additional process, as described above, only six random number maps may be generated or one may not be used after generating seven.

Six random number maps used in the process of puzzle-forming (primary encryption) the basic elements of the pixel are used to puzzle three basic elements in two steps. The first of the two random number maps corresponding to each basic element is used to replace the matrix unit, and the second to replace the pixel unit. Here, the substitution of the matrix unit means changing the position of the row and the row or the position of the column and the column, and the substitution of the pixel unit means changing the position between the pixels.

There are two reasons for applying the random number map in two stages as described above. The first is to increase security and stability because the encryption key codes used to generate each random number map are different, and the second is to generate the required random number map with even distribution.

According to the two kinds of random number maps described above, the first basic element of FIG. 1B is converted into the first basic element of FIG. 1E, the second basic element of FIG. 1C is converted into the second basic element of FIG. 1F, and The third basic element is converted into the third basic element of FIG. 1G.

On the other hand, the secondary encryption process is a process of generating the level map to map the basic elements of the pixel to the level map, three level map (R, G, B each) is used for this. If the encryption target consists of a step level, a step level map of one other gray level may be used. Then, the leveling map is generated based on the easy color in the application step. For example, each gradation such as yellow gradation, gray gradation, white gradation, black gradation, etc. may be used, and in the case of paper printing, yellow gradation, white gradation, etc. may be well applied.

According to the three kinds of step maps described above, the first basic element of FIG. 1E is converted into the first basic element of FIG. 1H, the second basic element of FIG. 1F is converted into the second basic element of FIG. 1I, and The third basic element is converted into the third basic element of FIG. 1J.

On the other hand, the third encryption process is a process of repuzzle using a random number map after combining the basic elements of the pixel, the remaining one random number map is used for this purpose. That is, after combining the respective basic elements generated in the second encryption process, the second one is repushed using the other random number map. By doing this, the degree of encryption can be further increased.

According to the other random number map described above, the first basic element of FIG. 1H is converted into the first basic element of FIG. 1K, the second basic element of FIG. 1I is converted into the second basic element of FIG. 1K, and The third basic element is converted into the third basic element of FIG. 1K.

Meanwhile, the process of converting the basic elements of the pixel into the pixel unit is a process for making an image in the pixel unit, and the three basic elements are combined into one pixel. According to this combination, the first pixel of FIG. 1A is converted into the first pixel of FIG. 1L. As described above, this conversion process is an additional element that is not an essential component in the present invention. When the process is not performed, three basic elements are converted into three pixels, so that three basic pixels are one pixel. The amount of data is tripled compared to the case of combining with. This is because in order to convert each basic element into one pixel, two basic elements that are lacking must be added to the dummy. For example, when any one element is an R element, the dummy G and B elements must be added and converted into pixels. Therefore, by performing the process of combining the three basic elements into one pixel, the data amount in the subsequent application process can be reduced to 1/3.

On the other hand, there is a method of processing the text information by considering the font itself as an image and a method using a code indicating the font. The former can be handled in the manner described above, and the latter can be done by arbitrarily defining the color corresponding to the bits that make up the code (eg 0 is white, 1 is black, etc.).

On the other hand, in the application process, as described above, by using the encrypted image generated by the step map as a background image of the specific information, it is possible to obtain a concealment effect due to optical illusion. In addition, by printing an encrypted image generated by a gradation map of a specific gradation (for example, yellow) on a specific portion of printing paper of the same color (for example, the background color of the printing paper is yellow), a portion that is encrypted to illegal counterfeiters You may even be unaware of it. The same effect can be obtained by using a variety of colors as the background color of printing paper even when using a multi-tone map (eg, red, wine, oar, candle, wave, south, beam, etc.).

According to the above-described application method, FIG. 1K is applied to the background image by overlaying the specific data called "information" as in FIG. 1M, or FIG. 1L is applied to the background image by overlaying the specific data called "above" as shown in FIG. 1N. The effect can be obtained.

In the above example, an application method for printing an encrypted encrypted image has been described. However, the encrypted image may be stored as digital information or may be applied in various ways such as transmitting the encrypted image to a dedicated decryption device through a transmission device. It can be utilized.

On the other hand, the decryption method is processed in the reverse order of the encryption method.

The decryption method according to the present invention largely includes an encrypted image preprocessing process, a multi-stage decryption process, and a post-processing process.

The first preprocessing process includes an input process and a normalization process.

The input process is a process of reading an encrypted image of an analog form previously output on a specific material (paper, plastic, etc.) through an image input unit, or reading pre-input digital form information from a database.

In an example of the present invention, an analog type image printed on the ground is read and digitized through an image input unit and passed to a multi-step decoding process. Therefore, before passing to the decoding process, a normalization process for correcting an input error generated at the time of input is required.

In the normalization process, the slope and the magnitude are corrected.

The tilt correction is a process that operates when an image input through the image input unit is input differently from the original tilt. If you do not correct the tilt error that occurs when you input, you can not distinguish between the required data area and the unnecessary data area and may affect the process going on later.

The size correction is a process of adjusting the size of the encrypted image to the minimum number of blocks required while the decrypted process. In this case, a scaling method using the maximum cumulative derivative is used in the three-dimensional frequency space which minimizes the interference effect generated when inputting between the pixels constituting the encrypted image.

The second multi-stage decoding process includes an inverse puzzle process, a phase map history process, and a basic element combining process. This will be described later in more detail.

The third post-processing process is an image correction process, in which there is a first reconstruction process for restoring a spatial filter method having an optimal similarity using information of neighboring pixels when there are miscellaneous images, and all neighboring pixels In this case, a second reconstruction may be performed by inferring and reconstructing by using reconstruction values of neighboring pixels.

Next, a detailed technical gist of the decoding method according to the present invention will be described.

The decryption method according to the present invention comprises the steps of generating a random number map, converting an encrypted image in pixel units into each elementary element, deciphering the encrypted image using a random number map and separating the encoded image into each element, Generating a leveling map and historying the basic elements of the pixel in the leveling map, re-puzzle recomposing the unit of the basic elements of the pixel using a random number map, and combining the basic elements of the decoded pixel. In addition, since each step is a part that can be understood by those skilled in the art with reference to the processing operation of each step described in detail in the encryption method, it will not be described herein any further.

Here, the process of converting the encrypted image in the pixel unit into each basic element unit and the process of de-puzzle the encrypted image using the random number map and separating the basic image into each basic element are additional elements that are not an essential component of the present invention. . In the process of generating the gradation map and causing the basic elements of the pixel to be written in the gradation map, the case of making the gradation map in history is described. However, as described in the encryption process, the gradation map may be mapped to the gradation map or the multi-gradation map.

2 is a configuration diagram of an encryption apparatus using a basic element of a pixel according to the present invention.

As shown in FIG. 2, the encryption apparatus according to the present invention includes an image input unit for converting and inputting analog form information (original image or text) into digital form or reading digital form information stored in a database. (21), the security code input unit 22 for inputting a unique security code for each individual, after decomposing the input information into the basic element of the pixel puzzled the basic element of the decomposed pixel using a random number map A central processing unit 23 for multi-level encryption by irregularly changing positions and colors respectively, information (original image, etc.) received through the image input unit 21, and an encrypted image encrypted by the central processing unit 23; The image storage unit 24 for storage and the encrypted image encrypted by the central processing unit 23 are printed on printed matters such as ID, money, bankbook or card. And an image display unit 26 for displaying the encrypted image encrypted by the central processing unit 23 on the screen.

Here, the encryption device may further include a communication unit (not shown) for transmitting the encrypted image encrypted by the central processing unit 23 to the dedicated decryption device side through the communication network. In addition, the central processing unit 23 is a portion in which the encryption method according to the present invention is executed, and a detailed operation thereof will be described later with reference to FIGS. 4 and 5.

The image printing unit 25, the image display unit 26, and the communication unit (not shown) are components for outputting an encrypted encrypted image, among which the image display unit 26 and the communication unit An additional element that is not required.

In the case of using such an encryption device and method, decryption is impossible without using the dedicated decryption device. In particular, the encrypted encryption image is changed in color and shape during the image input and conversion process, it is impossible to reverse estimation of the encryption algorithm due to the characteristics of the computer to compare the exact number.

Meanwhile, the dedicated decryption apparatus reads the encrypted image information through the image input unit and then restores the original image according to the decryption algorithm, thereby minimizing the time required to determine whether the forgery is made and maximizing the recognition rate. That is, even if some of the encrypted image information is damaged, the remaining part can be corrected and restored to maximize the recognition rate. In addition, the dedicated decryption device can be implemented as a mounting and compact portable for ease of use.

3 is a block diagram of an embodiment of a decoding apparatus using the basic elements of a pixel according to the present invention.

As shown in FIG. 3, the decryption apparatus according to the present invention includes an image input unit 31 for reading an encrypted image that is encrypted and printed, or reading digitally encrypted information stored in a database. A security code input unit 32 for inputting a security code of the inverted pixel element of the received encrypted image using a random number map, and inversed in a gradation map to change the position and color of the basic element of the pixel, respectively. After performing multi-step decryption, the central processing unit 33 for restoring the original image by combining the basic elements of the pixel, the image storage unit 34 for storing the encrypted encrypted image and the decrypted restored image, and forgery can be determined. And an image display unit 35 for displaying the decoded image (which may be displayed together with the original image). In this case, the image display unit 35 may be implemented to display the original image together.

Here, the decryption apparatus may further include a communication unit (not shown) for receiving the encrypted image encrypted at the encryption apparatus side through a communication network. The central processing unit 33 is a part for restoring the encrypted image in real time by executing the decryption method according to the present invention, and further compares the original image stored in the database with the decrypted image to determine whether the forgery exists. It can also be done. When the central processing unit 33 extracts the encryption key from the encrypted image and then decrypts the encryption key to restore the security code, the central processing unit 33 operates even without the security code input unit 32 in the present invention.

Other detailed operations will be described later with reference to FIGS. 6 and 7.

The image input unit 31 and the communication unit (not shown) are components for inputting an encrypted encrypted image, among which the communication unit is an additional element that is not an essential component of the present invention.

4 is a flowchart illustrating an embodiment of an encryption method using the basic elements of a pixel according to the present invention.

In the following encryption method, portions described in detail with reference to FIGS. 1A to 1N will be briefly described.

First, information such as an image or text is received through the image input unit (401). In this case, the image input unit converts and inputs analog form information (original image or text, etc.) into digital form or reads and inputs digital form information stored in a database.

Thereafter, the security code is input through the security code input unit (402).

Thereafter, a random number generator is used or a random number map is generated using a random number generator and a random number map generator (403). In this case, the random number generator may use various algorithms (eg, DES, SEED, etc.).

Thereafter, the color and size of the received image are adjusted and normalized (404). The normalization process 404 does not significantly affect the encryption process even when the digital information is received.

In the above processes, the information input process 401 and the security code input process 402 may be executed in reverse order. The random number map generation step 403 and the normalization step 404 may also be executed in reverse order. However, the information input process 401 must be performed before the normalization process 404, and the security code input process 402 must be performed before the random number map generation process 403 to smoothly perform the operation.

Thereafter, the normalized image is divided into basic elements of pixels to decompose pixels (405). As such, the method of decomposing the pixel into the basic elements of the pixel may use various known methods.

Thereafter, the basic elements of the decomposed pixel are multi-level encrypted (406). In the multi-step encryption process 406, the basic elements of the pixel are multi-step encrypted using a random number map and a gradation map. Detailed operations thereof will be described later with reference to FIGS. 5A to 5G.

Thereafter, after generating the encryption key by encrypting the received security code (407), the generated encryption key is inserted into the encrypted encryption image (408). However, in the encryption method of the present invention, the encryption key generation and insertion processes 407 and 408 are additional elements and do not need to be performed in the encryption process. Accordingly, in the decryption method described later, after the encryption key is extracted from the encrypted image, the encryption key is decrypted and used to restore the security code, or the security code is received and used in the decryption process.

Thereafter, the encrypted encrypted image is output (409). In this case, various output methods may be used, such as printing on printed matter, storing on a recording medium, and transmitting to a decryption device through a communication network. In particular, when printing among the output methods, the encrypted image is printed in the same color as the background so that the encrypted image is concealed in the background image. The specific information may be overlaid on the background on which the encrypted image is printed. Then, although the specified specific information acts as a little noise in the decoding process, the noise is removed in the correction process and thus does not significantly affect the decoded image.

5A-5G are a number of embodiment flow diagrams for a process 406 of multi-step encryption of the basic elements of the pixel of FIG.

First, referring to the embodiment shown in Figure 5a as follows.

First, the basic element of the decomposed pixel is first encrypted by puzzle-forming each unit using the generated random number map (501).

Subsequently, after generating the leveling map in units of the basic elements of the pixel (502), the basic element of the pixel is mapped to the generated leveling map to perform color conversion (503). Here, instead of the step tone map, a two-tone map or a multi-tone map may be used as described above.

Subsequently, after arranging the basic elements of the pixel mapped to the stepped map, re-puzzle using a random number map to perform third-order encryption (504). Here, the disposition process refers to a process of connecting the basic elements of the pixels as shown in FIG. 1K, and the order thereof is irrelevant.

Subsequently, the repuggled basic elements are converted into one pixel unit (505). At this time, the conversion process 505 is not an essential component of the present invention. The amount of data can be reduced to 1/3.

Since the following embodiments are modified examples of the embodiment illustrated in FIG. 5A, the technical subject matter will be described based on other parts, and the same technical subject will not be described any more.

Secondly, the embodiment shown in FIG. 5B is as follows.

First, after generating the stepwise map in units of the basic elements of the pixel (511), the basic element of the pixel is mapped to the generated stepwise map and subjected to color conversion (512).

Subsequently, the basic elements of the pixels mapped to the stepwise map are second-encrypted by puzzle-forming each unit by using the generated random number map (513).

Thereafter, after arranging the basic elements of the puzzled pixel, re-puzzle using a random number map to perform third-order encryption (514).

Thereafter, each of the re-puzzled basic elements is converted into one pixel unit (515).

Third, looking at the embodiment shown in Figure 5c as follows.

First, the basic elements of the decomposed pixel are first encrypted by puzzle-forming each unit using the generated random number map (521).

Thereafter, after arranging the basic elements of the puzzled pixel, second encryption is performed by repuzzle using a random number map (522).

Subsequently, after generating the leveling map in units of the basic elements of the pixel (523), the basic element of the pixel is mapped to the generated leveling map to perform color conversion (524).

Thereafter, each basic element mapped to the phase map is converted into one pixel unit (525).

Fourth, looking at the embodiment shown in Figure 5d as follows.

First, after generating a leveling map in units of the basic elements of the pixel (531), the primary element of the pixel is mapped to the generated leveling map to perform color conversion and primary encryption (532).

Subsequently, after arranging the basic elements of the pixel mapped to the stepped map, the generated random number map is puzzled and secondly encrypted (533). At this time, it may be puzzled for each elementary element without performing the arrangement process.

Subsequently, each puzzle element is converted into one pixel unit (534).

Fifth, looking at the embodiment shown in Figure 5e as follows.

First, after arranging the basic elements of the decomposed pixel, the first random encryption is performed by puzzle-forming using the generated random number map (541). In this case, a puzzle may be generated for each basic element without performing the arrangement process.

Subsequently, after generating the leveling map in units of the basic elements of the pixel (542), the basic element of the pixel is mapped to the generated leveling map and subjected to color conversion (543).

Subsequently, each basic element mapped to the phase map is converted into one pixel unit (544).

Sixth, an embodiment in which only one basic element is used when the values of the basic elements are the same will be described with reference to FIG. 5F.

First, one of the three decomposed basic elements is selected (551). At this time, since each basic element has the same value, any basic element may be selected.

Thereafter, after generating the step-join map with any one basic element (552), any one basic element is mapped to the generated step-join map to perform color conversion and primary encryption (553).

Thereafter, any one basic element mapped to the phase map is puzzled using the generated random number map to perform secondary encryption (554).

Thereafter, the puzzled one basic element is converted into one pixel (555). Seventh, as another embodiment using only one basic element when the values of the basic elements are the same, FIG. Looking at it as follows.

First, one of the three decomposed basic elements is selected (561). At this time, since the value of each element is the same, any element may be selected.

Thereafter, the selected random element is first encrypted by using the generated random number map as a puzzle.

Subsequently, after generating the stepwise map with any one basic element (563), any one basic element is mapped to the generated stepwise map and color-transformed (564).

Thereafter, any one basic element mapped to the stepwise map is converted into one pixel (565).

6 is a flowchart illustrating an embodiment of a decoding method using the basic elements of a pixel according to the present invention.

Since each decryption process is a part that can be understood by those skilled in the art with reference to the processing operation of each process described in detail in the encryption method, the following description will focus on the technical subject matter.

First, an encrypted encrypted image is received through the image input unit (601). At this time, the image input unit reads the encrypted image which is encrypted and printed in digital form, or reads and inputs the digital form of encrypted information stored in the database. On the other hand, instead of the image input unit, it is also possible to receive and input the encrypted encrypted image from the encryption apparatus side through the communication network.

Thereafter, the gradient and size of the received encrypted image are corrected and normalized (602). The normalization process 602 does not significantly affect the decoding process even when the digital information is received.

Thereafter, after extracting an encryption key from the received encryption image (603), the extracted encryption key is decrypted to restore a security code (604). On the other hand, the encryption key extraction and security code recovery process (603, 604), if the encryption key is generated in the encryption process, and implemented to receive the security code directly through the security code input unit on the decryption device without inserting the encryption image You do not have to do.

Here, the order of the encrypted image input process 601 and the security code input process may be reversed, and the normalization process 602 may be performed at any process from the encrypted image input process to before the multi-stage decryption process 606. It doesn't matter.

Thereafter, a random number generator is generated or a random number map is generated using a random number generator and a random number map generator (605).

Subsequently, the encrypted image is processed in units of basic elements of pixels, and then multi-level decryption is performed (606). In the multi-step decoding process 606, the basic elements of the pixel are multi-step decoded using a random number map and a gradation map. Detailed operations thereof will be described later with reference to FIGS. 7A to 7G.

Subsequently, the original image is restored by combining the basic elements of the decoded pixel (607). This is a reverse operation of the pixel decomposition process 405 in the encryption method.

Subsequently, the image is corrected by removing the ghosting from the restored image (608). In this case, the correction process 608 is a process of performing first-order correction using a spatial filter method having an optimal similarity using information of neighboring pixels when the decoded image has miscellaneous images, and when the neighboring pixels are all miscellaneous images. And back-estimating using the reconstructed values of neighboring pixels. The correction process 608 is not an essential component of the present invention, and is an additional process to improve the quality of the decoded image.

Thereafter, the corrected image is displayed to check whether the forgery exists (609).

Meanwhile, in the decoding method, before the display process 609, the process of determining whether the forgery is performed by comparing the original image stored in the database with the restored image may be performed, and then the determination result may be displayed. In addition, before the display process 609, after performing the process of determining whether the forgery by comparing the digitized information and the restored information on the information superimposed on the encrypted image, the determination result may be displayed. Further, before the display process 609, after performing the process of determining whether the forgery by comparing the restored information with the digitized information of the other information on the printed matter on which the encrypted image is printed, the determination result may be displayed. .

7A through 7G are flowcharts of a plurality of embodiments of a process 606 of multi-step decrypting by processing the encrypted image of FIG. 6 in units of basic elements of a pixel.

First, referring to the embodiment shown in Figure 7a as follows.

First, an encrypted image in pixel units is converted into units of basic elements (701). If the encrypted encrypted image is input in units of basic elements of the pixel, the conversion process 701 may not be performed.

Subsequently, the decoded cipher image transformed in units of the basic elements is de-puzzled using the generated random number map, and then firstly decoded by dividing each element in units of basic elements (702).

Subsequently, after generating the stepwise map in units of the basic elements of the pixel (703), the basic elements of the pixels are historically restored and color-decoded in the generated stepwise map (step 704). In this case, when the gradation map is used in the encryption process, the gradation map is also used in the decryption process. However, when the gradation map or the multi gradation map is used in the encryption process, the gradation map or the gradation map is used in the decryption process.

Subsequently, the fundamental element of the pixel mapped to the stepwise map is re-puzzled using the generated random number map to perform third order decoding (705).

Since the following embodiments are modified examples of the embodiment illustrated in FIG. 7A, the technical subject matter will be described based on other parts, and the same technical subject will not be described any more.

Secondly, the embodiment shown in FIG. 7B is as follows.

First, an encrypted image in pixel units is converted into units of basic elements (711).

Subsequently, the decoded cipher image converted into the basic element units is de-puzzled using the generated random number map, and then firstly decoded by separating each basic element unit (712).

Subsequently, the fundamental component of the de-puzzled pixel is re-puzzled using the generated random number map to perform second decoding (713).

Subsequently, after generating the stepwise map in units of the basic elements of the pixel (714), the basic elements of the pixels are inversely restored to the generated stepwise map and color-decoded (715).

Third, looking at the embodiment shown in Figure 7c as follows.

First, an encrypted image in pixel units is converted into units of basic elements (721).

Subsequently, after generating the stepwise map in units of the basic elements of the pixel (722), the basic elements of the pixels are historically restored and color-decoded in the generated stepwise map (730).

Thereafter, after performing the reverse puzzle using the generated random number map, the encrypted image recorded in the step map is separated and decoded by each basic element unit in second decoding (724).

Thereafter, the basic elements of the de-puzzled pixel are re-puzzled using the generated random number map to perform third-order decoding (725).

Fourth, looking at the embodiment shown in Figure 7d as follows.

First, an encrypted image in pixel units is converted into units of basic elements (731).

Subsequently, inverse puzzles are generated by using the generated random number map after deciphering the encrypted image converted into units of the basic elements, and separating the encoded images into units of each basic element and performing primary decoding. In this case, when the batch process is not performed in the encryption method, the separation process may not be performed.

Subsequently, after generating the stepwise map in units of the basic elements of the pixel (733), the basic elements of the pixels are historically restored and color-decoded in the generated stepwise map (734).

Fifth, the embodiment shown in FIG. 7E will be described.

First, an encrypted image in pixel units is converted into units of basic elements (741).

Subsequently, after generating the stepwise map in units of the basic elements of the pixel (742), the basic elements of the pixels are historically restored and color-decoded in the generated stepwise map (743).

Thereafter, after performing the reverse puzzle using the generated random number map, the encrypted image recorded in the step map is separated and decoded by each basic element unit (744).

Sixth, the embodiment shown in FIG. 7F is as follows.

First, an encrypted image in pixel units is converted into any one basic element (751). This is done by removing the basic elements of the dummy added in the encryption process.

Thereafter, the transformed one basic element is first decoded by de-puzzle using the generated random number map (752).

Thereafter, after generating the stepwise map using any one basic element (753), the arbitrary stepping element is historically restored and color restored to the generated stepwise map (754).

Subsequently, the other two basic elements are generated based on any one basic element in the history map, in operation 755.

Seventh, looking at the embodiment shown in Figure 7g as follows.

First, an encrypted image in pixel units is converted into any one basic element (761).

Thereafter, after generating the stepwise map using any one basic element (762), one basic element is historically restored and color restored to the generated stepwise map (763).

Thereafter, any one basic element in the history map is de-puzzled using the generated random number map and second-decoded (764).

Subsequently, the other two basic elements are generated based on the one fundamental element de-puzzled (765).

The present invention as described above can not only enhance the security and safety that the security system (especially the ground image security system, etc.) have so far, but also improve the concealment effect of the encryption by the security effect and the optical illusion effect by using a stepwise expression method. You can get it.

In addition, the present invention, identification card (passport, resident certificate, driver's license, student's card, civil servant's card, medical insurance card, etc.), bills, bills, securities, gift certificates, membership card, various certificates issued by the government office (certificate of seal, registered copy, etc.), It can be applied to various fields such as cards (credit cards, etc.) and bank accounts.

In the present invention, an encryption / decryption system and a method may be implemented by interworking the encryption device, the method, the decryption device, and the method. This is a part that can be naturally implemented by those skilled in the art will not be described in detail here.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

According to the present invention as described above, by multi-level encryption of information such as images and texts in units of basic elements of pixels according to random number algorithms and encryption algorithms, it is possible to encrypt high costs so that almost no decryption is possible without using a dedicated decryption apparatus.

In addition, the present invention, by encrypting the basic element of the pixel on the gradation map and encrypting it, and then prints the encryption image on the printed material of the same color as the gradation map, so that the print color and the background color of the encryption image is the same, Can not know which part is encrypted).

In addition, the present invention has the effect of restoring the encrypted image in real time by minimizing the time required to determine whether the forgery.

In addition, even if some of the encrypted image information is damaged, the present invention enables the correction and restoration using the multi-step image processing technique to maximize the recognition rate and have a stable restoration. In addition, the dedicated decryption device can be implemented as a mounting and compact portable for ease of use.

In addition, the present invention, identification card (passport, resident certificate, driver's license, student's card, civil servant's card, medical insurance card, etc.), bills, bills, securities, gift certificates, membership card, various certificates issued by the government office (certificate of seal, registered copy, etc.), There is an effect that can be applied to various fields such as cards (credit cards, etc.) and bank accounts.

Claims (133)

An encryption method applied to an encryption device using a basic element of a pixel, A first step of receiving information for encryption; A second step of generating a random number map; A third step of decomposing the encryption target information into units of basic elements of the pixel; Encrypting a basic element of the decomposed pixel; And A fifth step of outputting the encrypted information Encryption method using the basic elements of the pixel comprising a. The method of claim 1, The fourth step, And changing the position of the basic element of the pixel by using the generated random number map, and changing the color of the basic element of the pixel by using the gradation map to perform multi-step encryption. The method of claim 2, The fourth step, A sixth step of firstly encrypting the basic elements of the decomposed pixel by puzzle each unit using the generated random number map; A seventh step of generating a gradation map in units of basic elements of the pixels and then performing color conversion by mapping the basic elements of the pixels to the generated gradation maps to perform second encryption; And An eighth step of reordering the third element by arranging a basic element of the pixel mapped to the grayscale map using the random number map; Encryption method using the basic elements of the pixel comprising a. The method of claim 2, The fourth step, A sixth step of generating a gradation map in units of the basic elements of the pixels and then performing color conversion by first mapping the basic elements of the pixels to the generated gradation maps; A seventh step of performing a second encryption on the basic elements of the pixels mapped to the gradation map by puzzleting each unit using the generated random number map; And An eighth step of arranging the basic elements of the puzzled pixel and re-puzzle using a random number map to perform third-order encryption Encryption method using the basic elements of the pixel comprising a. The method of claim 2, The fourth step, A sixth step of firstly encrypting the basic elements of the decomposed pixel by puzzle each unit using the generated random number map; A seventh step of repositioning the second puzzle by using the random number map after arranging the basic elements of the puzzled pixel; And An eighth step of generating a gradation map in units of basic elements of the pixel and then performing color conversion by mapping the basic elements of the pixel to the generated gradation map to perform third order encryption Encryption method using the basic elements of the pixel comprising a. The method of claim 2, The fourth step, A sixth step of generating a gradation map in units of the basic elements of the pixels and then performing color conversion by first mapping the basic elements of the pixels to the generated gradation maps; And A seventh step of performing a second encryption on the basic elements of the pixels mapped to the grayscale map by using the generated random number map; Encryption method using the basic elements of the pixel comprising a. The method of claim 2, The fourth step, A sixth step of generating a gradation map in units of the basic elements of the pixels and then performing color conversion by first mapping the basic elements of the pixels to the generated gradation maps; And A seventh step of arranging the second elementary encryption by arranging the basic element of the pixel mapped to the gradation map using the generated random number map Encryption method using the basic elements of the pixel comprising a. The method of claim 2, The fourth step, A sixth step of firstly encrypting the basic elements of the decomposed pixel by using the generated random number map; And A seventh step of generating a gradation map in units of basic elements of the pixel and then performing color transformation by mapping the basic elements of the pixel to the generated gradation map and performing second color encryption Encryption method using the basic elements of the pixel comprising a. The method of claim 2, The fourth step, A sixth step of arranging the primary elements of the decomposed pixel and first encrypting the puzzles by using the generated random number map; And A seventh step of generating a gradation map in units of basic elements of the pixel and then performing color transformation by mapping the basic elements of the pixel to the generated gradation map and performing second color encryption Encryption method using the basic elements of the pixel comprising a. The method of claim 2, The fourth step, A sixth step of selecting one of the decomposed basic elements; A seventh step of generating a gradation map with any one basic element and first encrypting the color tone by mapping any one basic element to the generated gradation map; And An eighth step of performing a second encryption on any one basic element mapped to the gradation map using a generated random number map Encryption method using the basic elements of the pixel comprising a. The method of claim 2, The fourth step, A sixth step of selecting one of the decomposed basic elements; A seventh step of firstly encrypting the selected one element by using the generated random number map as a puzzle; And An eighth step of generating an gradation map with any one element and then encrypting the second element by mapping any one element with the generated gradation map Encryption method using the basic elements of the pixel comprising a. The method of claim 10 or 11, The fourth step, A ninth step of converting any one elementary element encoded in the last order into one pixel; Encryption method using the basic elements of the pixel further comprising. The method according to any one of claims 3 to 9, The fourth step, A ninth step of converting a basic element of the pixel encoded in the last order into one pixel unit; Encryption method using the basic elements of the pixel further comprising. The method according to any one of claims 2 to 11, The color conversion process, When the encrypted information is printed, a gradation map of the background color series is generated in units of the element of the pixel so as to be printed in the same color as the background color of the printed matter, and then the basic elements of the pixel are mapped onto the generated gradation map. Encryption method using the basic elements of the pixel, characterized in that the color conversion to the background color series. The method according to any one of claims 2 to 11, The gradation map is, An encryption method using the basic elements of a pixel, characterized in that the level map of a single series. The method of claim 15, The step map is, An encryption method using a basic element of a pixel, characterized in that it comprises a yellow gradation map. The method according to any one of claims 2 to 11, The gradation map is, An encryption method using the basic elements of pixels, characterized in that the multi-gradation map of the multi-series. The method of claim 1, The fourth step, And encrypting by changing the position of the basic element of the pixel by using the generated random number map. The method of claim 18, The fourth step, The encryption method using the basic element of the pixel, characterized in that the position of the element of the pixel by using the generated random number map puzzled by each unit. The method according to any one of claims 1 to 11, 18 and 19, Tenth step of normalizing by adjusting the color and size of the information to be encrypted Encryption method using the basic elements of the pixel further comprising. The method according to any one of claims 1 to 11, 18 and 19, A tenth step of generating an encryption key by encrypting the received security code; And An eleventh step of inserting the generated encryption key into the encrypted information Encryption method using the basic elements of the pixel further comprising. The method according to any one of claims 1 to 11, 18 and 19, The first step is, A tenth step of receiving information for encryption such as an image or text; And Eleventh step of receiving security code Encryption method using the basic elements of the pixel comprising a. The method of claim 22, The tenth step is An encryption method using a basic element of a pixel, characterized in that for receiving information to convert the encryption information, such as an image or text of the analog form to a digital form. The method of claim 22, The tenth step is An encryption method using the basic elements of a pixel, characterized in that for reading information for encryption, such as a digital image or text stored in a recording medium. The method according to any one of claims 1 to 11, 18 and 19, The second step, An encryption method using the basic elements of a pixel, characterized in that for generating a random number map using a random number generator. The method according to any one of claims 1 to 11, 18 and 19, The second step, An encryption method using basic elements of pixels, characterized by generating a random number map using a random number generator and a random number generator. The method according to any one of claims 1 to 11, 18 and 19, The fifth step, And encrypting the encrypted information. The method of claim 27, The print object, Identification card (passport, resident certificate, driver's license, student's card, government employee's card, medical insurance card, etc.), bills, bills, securities, gift certificates, membership card, various certificates issued by government offices And a bank account. The method of claim 27, The printing process, And printing the encrypted information by overlaying specific information on the printed matter. The method of claim 27, The fifth step, And displaying the encrypted information on the screen. The method according to any one of claims 1 to 11, 18 and 19, The fifth step, And transmitting the encrypted information to an external device. The method according to any one of claims 1 to 11, 18 and 19, The fifth step, And storing the encrypted information on a recording medium. In the decoding method applied to the decoding device using the basic element of the pixel, A first step of receiving encrypted information; Obtaining a security code for decrypting the encrypted information; Generating a random number map; A fourth step of processing and encrypting the encrypted information in units of basic elements of a pixel; A fifth step of restoring original information by combining basic elements of the decoded pixel; And A sixth step of outputting the restored original information; Decoding method using the basic elements of the pixel comprising a. The method of claim 33, wherein The fourth step, And inversely changing the position of the basic element of the pixel by using the generated random number map, and performing multi-step decoding by inverting the color of the basic element of the pixel by using the gradation map. The method of claim 34, wherein The fourth step, A seventh step of inversely deciphering the encrypted image of the basic element unit of the pixel by using the generated random number map and separating the first image by the basic element unit of each pixel; An eighth step of generating a gradation map in units of a basic element of a pixel and performing secondary color decoding on the generated gradation map by historically restoring a color of the basic element of the pixel; And A ninth step of reordering the basic elements of the pixels in the grayscale map by using the generated random number map to perform third order decoding; Decoding method using the basic elements of the pixel comprising a. The method of claim 34, wherein The fourth step, A seventh step of inversely puzzle-coding the encrypted image of each element of the pixel by using the generated random number map, and then firstly decoding the element into an element unit of each element; An eighth step of performing second-order decoding of the fundamental elements of the de-puzzled pixel by re-puzzle using the generated random number map; And A ninth step of generating a gradation map in units of basic elements of the pixel and then performing color restoration on the generated gradation map, restoring color, and performing third-order decoding; Decoding method using the basic elements of the pixel comprising a. The method of claim 34, wherein The fourth step, A seventh step of generating a gradation map in units of a basic element of a pixel, and then performing color restoration on the generated gradation map to restore and color-decode the primary elements; An eighth step of inversely deciphering the encrypted image recorded in the gradation map by using the generated random number map and performing second-order decoding on each element basis; And A ninth step of re-puzzle the third element by decoding the basic elements of the de-puzzled pixel using the generated random number map Decoding method using the basic elements of the pixel comprising a. The method of claim 34, wherein The fourth step, A seventh step of inversely puzzle-forming an encrypted image in units of basic elements of a pixel by using the generated random number map; And An eighth step of generating a gradation map in units of basic elements of the pixel, and then performing color restoration on the generated gradation map and restoring the color to second decoding Decoding method using the basic elements of the pixel comprising a. The method of claim 34, wherein The fourth step, A seventh step of inversely puzzle-coding the encrypted image of each element of the pixel by using the generated random number map, and then firstly decoding the element into an element unit of each element; And An eighth step of generating a gradation map in units of basic elements of the pixel, and then performing color restoration on the generated gradation map and restoring the color to second decoding Decoding method using the basic elements of the pixel comprising a. The method of claim 34, wherein The fourth step, A seventh step of generating a gradation map in units of a basic element of a pixel, and then performing color restoration on the generated gradation map to restore and color-decode the primary elements; And An eighth step of inverse-puzzle-decoding the encrypted image recorded in the gradation map by using the generated random number map; Decoding method using the basic elements of the pixel comprising a. The method of claim 34, wherein The fourth step, A seventh step of generating a gradation map in units of a basic element of a pixel, and then performing color restoration on the generated gradation map to restore and color-decode the primary elements; And An eighth step of inversely deciphering the cryptographic image recorded in the gradation map by using the generated random number map, and separating and decoded the data into units of each element by second; Decoding method using the basic elements of the pixel comprising a. The method of claim 34, wherein The fourth step, A seventh step of first-decoding a random element by de-puzzle using the generated random number map; An eighth step of generating a gradation map from any one basic element and performing secondary color decoding on the generated gradation map by history-color restoration of any one basic element; And A ninth step of generating another basic element of the pixel by using any one basic element recorded in the gradation map; Decoding method using the basic elements of the pixel comprising a. The method of claim 34, wherein The fourth step, A seventh step of generating a gradation map with any one basic element and then performing color restoration on the generated gradation map by first restoring the color to first decoding; An eighth step of inversely puzzle-forming any one basic element in the gradation map by using the generated random number map; And A ninth step of generating another basic element of the pixel by using the one defuncted basic element; Decoding method using the basic elements of the pixel comprising a. The method of claim 42 or 43, The fourth step, The tenth step of converting the encrypted image in pixel units into any one elementary element Decoding method using the basic elements of the pixel further comprising. The method according to any one of claims 35 to 41, The fourth step, The tenth step of converting the encrypted image in the pixel unit to the basic element unit of the pixel Decoding method using the basic elements of the pixel further comprising. The method according to any one of claims 34 to 43, The gradation map is, A decoding method using the basic elements of a pixel, characterized in that a single-level step map. The method of claim 46, The step map is, A decoding method using a basic element of a pixel, characterized in that it comprises a yellow gradation map. The method according to any one of claims 34 to 43, The gradation map is, A decoding method using the basic elements of a pixel, which is a multi-gradation multi-gradation map. The method of claim 33, wherein The fourth step, And reversing and decoding positions of basic elements of a pixel by using the generated random number map. The method of claim 49, The fourth step, A method of decoding using a fundamental element of a pixel, wherein the position of the basic element of the pixel is de-puzzled and decoded using the generated random number map. The method according to any one of claims 33 to 43, 49 and 50, An eleventh step of normalizing by correcting the slope and size of the encrypted information Decoding method using the basic elements of the pixel further comprising. The method according to any one of claims 33 to 43, 49 and 50, An eleventh step of correcting an image by removing blemishes from the restored image Decoding method using the basic elements of the pixel further comprising. The method of claim 52, wherein The eleventh step, A first reconstruction process for reconstructing a spatial image using a spatial filter method having an optimum similarity degree using information of neighboring pixels when the reconstructed image contains miscellaneous images; And Secondary restoration process in which the neighbor pixels are back-estimated and restored using the restored values of neighboring pixels Decoding method using the basic elements of the pixel comprising a. The method according to any one of claims 33 to 43, 49 and 50, An eleventh step of comparing the restored image with the original image stored in the database to determine whether the image is counterfeit, and to display a result of the determination; Decoding method using the basic elements of the pixel further comprising. The method according to any one of claims 33 to 43, 49 and 50, The eleventh step is performed by comparing the digitized information superimposed on the encrypted image with the restored information to determine whether the information is counterfeit, and displaying the determination result. Decoding method using the basic elements of the pixel further comprising. The method according to any one of claims 33 to 43, 49 and 50, An eleventh step of comparing the digitized information of the other information on the printed matter printed with the encrypted image with the restored information to determine whether the information is forged, and to display the determination result. Decoding method using the basic elements of the pixel further comprising. The method according to any one of claims 33 to 43, 49 and 50, An eleventh step of displaying the original image while outputting the restored original information Decoding method using the basic elements of the pixel further comprising. The method according to any one of claims 33 to 43, 49 and 50, The first step is, A decryption method using the basic elements of a pixel, characterized in that the encrypted image read out encrypted and printed on a printing object is read in digital form. The method of claim 58, The printed matter on which the encrypted image is printed, Identification card (passport, resident certificate, driver's license, student's card, government employee's card, medical insurance card, etc.), bills, bills, securities, gift certificates, membership card, various certificates issued by government offices And a bank account. The method according to any one of claims 33 to 43, 49 and 50, The first step is, A decryption method using the basic elements of a pixel, characterized by reading a digitally encrypted encrypted image stored in a recording medium. The method according to any one of claims 33 to 43, 49 and 50, The first step is, A decryption method using the basic elements of a pixel, characterized by receiving an encrypted encrypted image from an encryption device side. The method according to any one of claims 33 to 43, 49 and 50, The second step, An eleventh step of extracting an encryption key from the received encryption image; And Step 12 of restoring the security code by decrypting the extracted encryption key Decoding method using the basic elements of the pixel comprising a. The method according to any one of claims 33 to 43, 49 and 50, The second step, Decryption method using the element of the pixel, characterized in that for receiving the security code through the security code input unit. The method according to any one of claims 33 to 43, 49 and 50, The third step, A decoding method using basic elements of pixels, characterized by generating a random number map using a random number generator. The method according to any one of claims 33 to 43, 49 and 50, The third step, A decoding method using basic elements of pixels, characterized by generating a random number map using a random number generator and a random number map generator. In the encryption device using the basic element of the pixel, Input means for receiving information for encryption; Security code input means for receiving a security code; Encryption means for encrypting the information for encryption received through the input means into a basic element of the pixel and then encrypting the information; Storage means for storing information according to the encryption process; And Output means for outputting the encrypted information Encryption apparatus using the basic elements of the pixel comprising a. The method of claim 66, wherein The encryption means, And a multi-level encryption method for changing the position of the basic element of the decomposed pixel using a random number map and changing the color of the basic element of the pixel using a gradation map. The method of claim 67 wherein The multi-step encryption process in the encryption means, The primary element of the decomposed pixel is first encrypted by using a random number map for each unit, After generating the gradation map in units of the basic elements of the pixel, the second gradation is generated by mapping the basic elements of the pixel to the generated gradation map and performing color conversion. And arranging the basic element of the pixel mapped to the gradation map to repuzzle using a random number map to perform third-order encryption. The method of claim 67 wherein The multi-step encryption process in the encryption means, After generating the gradation map in units of the basic elements of the pixel, the primary gradation of the pixel is mapped to the generated gradation map, and then color-transformed. The second element is encrypted by converting the basic elements of the pixel mapped to the gradation map into each unit using a random number map, And arranging the basic elements of the puzzled pixel and re-puzzle using a random number map to perform third-order encryption. The method of claim 67 wherein The multi-step encryption process in the encryption means, The primary element of the decomposed pixel is first encrypted by using a random number map for each unit, After arranging the basic elements of the puzzled pixel, second encryption is performed by repuzzle using a random number map, And generating a gradation map in units of the element of the pixel, and then performing color conversion by mapping the element of the pixel to the generated gradation map to perform third-order encryption. The method of claim 67 wherein The multi-step encryption process in the encryption means, After generating the gradation map in units of the basic elements of the pixel, the primary gradation of the pixel is mapped to the generated gradation map, and then color-transformed. And a second encryption of a basic element of a pixel mapped to the gray level map using a random number map. The method of claim 67 wherein The multi-step encryption process in the encryption means, After generating the gradation map in units of the basic elements of the pixel, the primary gradation of the pixel is mapped to the generated gradation map, and then color-transformed. And arranging a basic element of the pixel mapped to the gradation map and performing a second encryption using a random number map. The method of claim 67 wherein The multi-step encryption process in the encryption means, Primary encryption of the decomposed pixel by using a random number map puzzle, And generating a gray level map in units of the basic elements of the pixels, and then performing color conversion by mapping the basic elements of the pixels to the generated gray level maps to perform second-order encryption. The method of claim 67 wherein The multi-step encryption process in the encryption means, After arranging the basic elements of the decomposed pixel, the first encryption is performed by using a random number map to make a puzzle. And generating a gray level map in units of the basic elements of the pixels, and then performing color conversion by mapping the basic elements of the pixels to the generated gray level maps to perform second-order encryption. The method of claim 67 wherein The multi-step encryption process in the encryption means, Select any one of the decomposed basic elements, After generating a gradation map with any one basic element, first encrypting the color tone by mapping any one basic element to the generated gradation map, And any one basic element mapped to the gradation map is puzzled using a random number map to perform secondary encryption. The method of claim 67 wherein The multi-step encryption process in the encryption means, Select any one of the decomposed basic elements, Primary encryption by randomizing the selected one of the basic elements using a random number map, And generating second color encryption by mapping any one basic element to the generated gray level map and performing second color encryption on the generated gray level map. 77. The method of claim 75 or 76, The multi-step encryption process in the encryption means, And converting any one basic element encrypted in the last order into one pixel. 75. The method of any of claims 68 to 74, wherein The multi-step encryption process in the encryption means, And converting the basic element of the pixel encoded in the final order into one pixel unit. 77. The method of any of claims 67-76, The color conversion process, When the encrypted information is printed, a gradation map of the background color series is generated in units of the element of the pixel so as to be printed in the same color as the background color of the printed matter, and then the basic elements of the pixel are mapped onto the generated gradation map. An encryption device using the basic elements of the pixel, characterized in that the color conversion to the background color series. 77. The method of any of claims 67-76, The gradation map is, An encryption device using the basic elements of a pixel, characterized in that a single-level step map. 81. The method of claim 80, The step map is, An encryption device using a basic element of a pixel, characterized in that it comprises a yellow gradation map. 77. The method of any of claims 67-76, The gradation map is, An encryption device using the basic elements of pixels, characterized in that the multi-gradation map of the multi-series. The method of claim 66, wherein The encryption means, And encrypting by changing the position of the element of the decomposed pixel by using a random number map. 84. The method of claim 83 wherein The encryption means, And encrypting the position of the element of the decomposed pixel by using a random number map as a puzzle. 85. The method of any of claims 66-76, 83, 84, The encryption means, And an additional function of normalizing by adjusting a color and a size of the information to be encrypted. 85. The method of any of claims 66-76, 83, 84, The encryption means, And encrypting the input security code to generate an encryption key, and further inserting the generated encryption key into the encrypted information. 85. The method of any of claims 66-76, 83, 84, The input means, An encryption device using the basic elements of a pixel, characterized in that for converting information for encryption, such as an image or text in an analog form to a digital form. 85. The method of any of claims 66-76, 83, 84, The input means, An encryption device using a basic element of a pixel, characterized in that for reading information for encryption, such as a digital image or text stored in a recording medium. 85. The method of any of claims 66-76, 83, 84, The output means, And printing means for printing the multi-level encrypted information on a print object. 92. The method of claim 89, The print object, Identification card (passport, resident certificate, driver's license, student's card, government employee's card, medical insurance card, etc.), bills, bills, securities, gift certificates, membership card, various certificates issued by government offices And a bank account. 92. The method of claim 89, The printing means, And performing a function of overlaying specific information on the printed matter on which the multi-level encrypted information is printed, and printing the basic information of the pixel. 85. The method of any of claims 66-76, 83, 84, The output means, Display means for displaying the multi-level encrypted information on a screen Encryption apparatus using the basic elements of the pixel further comprising. 85. The method of any of claims 66-76, 83, 84, The output means, Communication means for transmitting the multi-level encrypted information to an external device Encryption apparatus using the basic elements of the pixel further comprising. In the decoding apparatus using the basic element of the pixel, Input means for receiving encrypted information; Security code obtaining means for obtaining a security code; Decrypting means for restoring original information by combining the basic elements of the decrypted pixels after decrypting the basic elements of the pixels for the encrypted information received through the input means; Storage means for storing information according to the decoding process; And Output means for outputting the restored original information Decoding apparatus using the basic elements of the pixel comprising a. 95. The method of claim 94, The decoding means, Inversely changing the position of the element of the pixel with respect to the encrypted information received through the input means using a random number map, and using the gradation map inversely changing the color of the element of the pixel using a multi-level decoding Decryption apparatus using the basic elements of the. 97. The method of claim 95, The multi-step decoding process in the decoding means, After deciphering the encrypted image in units of basic elements of a pixel by using a random number map, it is first decoded by separating each element in units of basic elements of each pixel After generating the gradation map in units of the basic elements of the pixels, the basic constituents of the pixels are historically restored by performing color restoration on the generated gradation maps, and second decoding. And a third order decoding of the basic elements of the pixels in the gray level map by re-puzzle using a random number map. 97. The method of claim 95, The multi-step decoding process in the decoding means, After deciphering the encrypted image in the unit of pixel element by using random number map, first decoding by separating each element in element unit, Re-puzzle and re-decode the basic elements of the de-puzzled pixel using a random number map, And generating a gradation map in units of the element of the pixel, and performing a third-order decoding on the generated gradation map by performing color restoration on the generated gradation map. 97. The method of claim 95, The multi-step decoding process in the decoding means, After generating the gradation map in units of the basic elements of the pixels, the basic constituents of the pixels are historically restored and color-decoded on the generated gradation maps, After deciphering the coded image recorded in the gradation map using a random number map, the second decoding is performed by separating each basic element into units. And a third-order decoding of the basic elements of the de-puzzled pixel by re-puzzle using a random number map. 97. The method of claim 95, The multi-step decoding process in the decoding means, The first image is decoded by inverse puzzle using a random number map in units of basic elements of pixels. And generating second grayscale decoding of the basic color elements of the pixel in the generated gray level map, and performing second-decoding by generating the gray level maps in units of the basic elements of the pixels. 97. The method of claim 95, The multi-step decoding process in the decoding means, After deciphering the encrypted image in the unit of pixel element by using random number map, first decoding by separating each element in element unit, And generating second grayscale decoding of the basic color elements of the pixel in the generated gray level map, and performing second-decoding by generating the gray level maps in units of the basic elements of the pixels. 97. The method of claim 95, The multi-step decoding process in the decoding means, After generating the gradation map in units of the basic elements of the pixels, the basic constituents of the pixels are historically restored and color-decoded on the generated gradation maps, And a second-order decoding of the encrypted image recorded in the grayscale map by using a random number map to de-puzzle. 97. The method of claim 95, The multi-step decoding process in the decoding means, After generating the gradation map in units of the basic elements of the pixels, the basic constituents of the pixels are historically restored and color-decoded on the generated gradation maps, And a second decoding is performed by de-puzzle the encrypted image recorded in the gradation map by using a random number map, and then decoded by each basic element unit to perform secondary decoding. 97. The method of claim 95, The multi-step decoding process in the decoding means, Inversely puzzle one arbitrary element by using a random number map to decode first After generating the gradation map with any one element, the second element is decoded by color restoration by history of any one element in the generated gradation map, And another basic element of the pixel by using any one basic element in the gradation map. 97. The method of claim 95, The multi-step decoding process in the decoding means, After generating a gradation map with any one basic element, the original gradation map is color-decoded by first generating a history of any one basic element, and first decoding Inverse puzzles the second element of any one of the basic elements in the gradation map by using a random number map, And generating another basic element of the pixel by using any one of the de-puzzled basic elements. 105. The method of claim 103 or 104, The multi-step decoding process in the decoding means, And a function of converting an encrypted image in a pixel unit into any one basic element. 103. The method of any of claims 96-102, The multi-step decoding process in the decoding means, And a function of converting an encrypted image in a pixel unit into a unit of a basic element of a pixel. 105. The method of any of claims 95-104, The gradation map is, A decoding apparatus using the basic elements of a pixel, characterized in that the single-level step map. 108. The method of claim 107 wherein The step map is, And a yellow gradation map. 105. The method of any of claims 95-104, The gradation map is, A decoding apparatus using the basic elements of a pixel, characterized in that the multi-gradation map of the multi-series. 95. The method of claim 94, The decoding means, And decrypting the position of the basic element of the pixel with respect to the encrypted information received through the input means by inverting the position of the basic element by using a random number map. 113. The method of claim 110, The decoding means, And decoding the position of the basic element of the pixel with respect to the encrypted information input through the input means by de-puzzle by using a random number map. 111. The method of any of claims 94-104, 110, 111, The decoding means, And a function of correcting the slope and size of the encrypted information to normalize the encrypted information. 111. The method of any of claims 94-104, 110, 111, The decoding means, And a function of correcting an image by removing noise from the reconstructed image. 113. The method of claim 113, The correction process, When the reconstructed image has miscellaneous images, the image is reconstructed using a spatial filter method having an optimal similarity using information of neighboring pixels. And reconstructing by inferring by using reconstructed values of neighboring pixels when all of the neighboring pixels are miscellaneous. 111. The method of any of claims 94-104, 110, 111, The decoding means, And comparing the original image stored in the database with the reconstructed image to determine whether the forgery is performed, and transmitting the determination result to the output means. 111. The method of any of claims 94-104, 110, 111, The decoding means, A decoding apparatus using the basic elements of the pixel, characterized in that the information obtained by comparing the digitized information superimposed on the encrypted image with the restored information is discriminated against and forged. . 111. The method of any of claims 94-104, 110, 111, The decoding means, Comparing the digitalized information of the other information on the printed matter on which the encrypted image is printed with the restored information to determine whether the forgery is performed, and transmitting the determination result to the output means. Decryption device used. 111. The method of any of claims 94-104, 110, 111, The output means, And an original image is also displayed while outputting the restored original information. 111. The method of any of claims 94-104, 110, 111, The input means, A decryption apparatus using the basic elements of pixels, characterized in that the encrypted image printed on the printed object to be encrypted is read in digital form. 119. The method of claim 119 wherein The printed matter on which the encrypted image is printed, Identification card (passport, resident certificate, driver's license, student's card, government employee's card, medical insurance card, etc.), bills, bills, securities, gift certificates, membership card, various certificates issued by government offices And a bank account. 111. The method of any of claims 94-104, 110, 111, The input means, A decryption apparatus using the basic elements of pixels, characterized by reading an encrypted encrypted image in digital form stored in a recording medium. 111. The method of any of claims 94-104, 110, 111, The input means, A decryption apparatus using the basic elements of a pixel, characterized in that the encrypted encrypted image is received from the encryption apparatus side. 111. The method of any of claims 94-104, 110, 111, The security code obtaining means, And extracting an encryption key from the received encrypted image, and then decrypting the extracted encryption key to restore a security code. 111. The method of any of claims 94-104, 110, 111, The security code obtaining means, Decryption apparatus using the basic element of the pixel, characterized in that the security code input unit for receiving a security code. In the encryption / decoding method applied to the encryption / decryption apparatus using the basic elements of the pixel, A first step of receiving information for encryption; Generating a random number map for encryption; A third step of decomposing the encryption target information into units of basic elements of the pixel; A fourth step of multi-step encrypting the basic elements of the decomposed pixel; A fifth step of outputting the encrypted information; A sixth step of receiving encrypted information; A seventh step of obtaining a security code for decrypting the encrypted information; An eighth step of generating a random number map for decoding; A ninth step of processing the encrypted information in units of basic elements of a pixel and performing multi-step decryption; A tenth step of combining original elements of the decoded pixel to restore original information; And An eleventh step of outputting the restored original information Decryption method using the basic elements of the pixel comprising a. In the encryption / decryption apparatus using the basic elements of the pixel, Input means for receiving information for encryption and encrypted information; Security code input means for receiving a security code for encryption; After decomposing the information for encryption received through the input means into the basic element of the pixel, the position of the basic element of the decomposed pixel is changed by using a random number map and the color of the basic element of the pixel is changed by using the gradation map. Multi-step encryption means for multi-step encryption by means of; Security code obtaining means for obtaining a security code for decryption; After inverting the position of the basic element of the pixel with respect to the encrypted information input through the input means by using a random number map and inversely changing the color of the basic element of the pixel by using the gradation map, the multi-step decryption is performed. Multi-stage decoding means for restoring original information by combining the basic elements of the pixels; Storage means for storing information according to the multi-step encryption process and information according to the multi-step decryption process; And Output means for outputting the multi-level encrypted information and the restored original information Decryption apparatus using the basic elements of the pixel comprising a. In an encryption device having a processor for encrypting using the basic elements of a pixel, A first function of receiving information for encryption; A second function of generating a random number map; A third function of decomposing encryption target information into units of basic elements of a pixel; A fourth function of multi-level encryption of the element of the decomposed pixel; And A fifth function of outputting the encrypted information A computer-readable recording medium having recorded thereon a program for realizing this. 127. The method of claim 127, wherein Sixth function for adjusting and normalizing color and size of the encryption target information A computer-readable recording medium that records a program for further realization. 129. The method of claim 127 or 128, wherein A seventh function of encrypting the input security code to generate an encryption key; And An eighth function of inserting the generated encryption key into the encrypted information A computer-readable recording medium that records a program for further realization. In order to decode by using the basic elements of the pixel, a decoding apparatus having a processor, A first function of receiving encrypted information; A second function of obtaining a security code for decrypting the encrypted information; A third function of generating a random number map; A fourth function of processing the encrypted information in units of basic elements of a pixel and performing multi-step decryption; A fifth function of restoring original information by combining basic elements of the decoded pixel; And A sixth function of outputting the restored original information A computer-readable recording medium having recorded thereon a program for realizing this. 131. The method of claim 130, A seventh function of correcting and correcting the slope and size of the encrypted information A computer-readable recording medium that records a program for further realization. The method of claim 130 or 131, wherein An eighth function of correcting an image by removing noise from the restored image A computer-readable recording medium that records a program for further realization. In order to encrypt and decode by using the basic elements of the pixel, an encryption and decryption apparatus having a processor, A first function of receiving information for encryption; A second function of generating a random number map for encryption; A third function of decomposing encryption target information into units of basic elements of a pixel; A fourth function of multi-level encryption of the element of the decomposed pixel; A fifth function of outputting the encrypted information; A sixth function of receiving encrypted information; A seventh function of obtaining a security code for decrypting the encrypted information; An eighth function of generating a random number map for decoding; A ninth function of processing the encrypted information in units of basic elements of a pixel and performing multi-step decryption; A tenth function of restoring original information by combining the basic elements of the decoded pixel; And An eleventh function for outputting the restored original information A computer-readable recording medium having recorded thereon a program for realizing this.