KR101659286B1 - Apparatus for display of electronic signature and method for display of electronic signature using the same - Google Patents

Apparatus for display of electronic signature and method for display of electronic signature using the same Download PDF

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Publication number
KR101659286B1
KR101659286B1 KR1020150086833A KR20150086833A KR101659286B1 KR 101659286 B1 KR101659286 B1 KR 101659286B1 KR 1020150086833 A KR1020150086833 A KR 1020150086833A KR 20150086833 A KR20150086833 A KR 20150086833A KR 101659286 B1 KR101659286 B1 KR 101659286B1
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KR
South Korea
Prior art keywords
signature
image
code
electronic document
information
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KR1020150086833A
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Korean (ko)
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임진혁
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임진혁
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
    • G06K7/1404—Methods for optical code recognition
    • G06K7/1408—Methods for optical code recognition the method being specifically adapted for the type of code
    • G06K7/1417—2D bar codes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
    • G06K19/06037—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking multi-dimensional coding
    • G06K2009/0059—

Abstract

The present invention relates to an electronic signature display apparatus and an electronic signature display method having enhanced security, and a method of displaying an electronic signature according to the present invention is a method for displaying an electronic signature by inputting a signature for confirmation or authentication of a created electronic document, A first step of generating a first signature image by imaging; A second step of generating a code image of a predetermined size by using the two-dimensional code generated by encrypting the content information of the electronic document and the unique information of the used terminal; And a third step of synthesizing the code image with the first signature image to generate an authentication image, and displaying the authentication image on a predetermined signature area on the electronic document.

Description

[0001] The present invention relates to an electronic signature display method and an electronic signature display method,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic signature display apparatus and an electronic signature display method, and more particularly to an electronic signature display apparatus and an electronic signature display method which are difficult to be stolen / altered or stolen, .

Traditionally, certificates for documents such as contracts, commerce documents, and official documents have often been provided through a seal, a registered seal, a handprint, or a handwritten signature. After confirming that it was not forged, this authentication was able to accomplish certain goals such as document authentication, document authentication, and non-repudiation.

In order to provide the purpose and function of a traditional seal or a registered seal in a digital environment, a method of authenticating a user or a digital message using an electronic signature based on an authorized and a private certificate is required to be certified (authenticity) Integrity, and non-repudiation.

Currently, widely used authentication methods using public certificates are used in the case of the elderly who are using Active Ax and are inconvenient to use in a mobile environment using a smart phone or a tablet PC and have difficulties in using a PC or a smart phone There is a problem that this is difficult.

If a timestamp is given to an electronic document from a public authority that has been certified as a standard time, it can be used as a means of ensuring the integrity of the document, so that it is possible to check forgiveness. However, when there is no denial function, There is a problem in that there is no public confidence at the time of issue of the time stamp.

On the other hand, certifications for paper documents or printed documents are replaced by signatures rather than stamps, which is also the case for electronic documents. In the case of electronic signatures for verification or authentication of electronic documents, only a part of them are practically used because of possibility of straying / modulating or theft.

A signature image entered by a user using a touch pen or the like may be exploited to be used for a contract or other electronic document having no relation to the signer in case of leakage due to hacking or the like, Or there is no way to know if it was stolen. Also, even if the signer directly signs it, there is a problem that there is no way to check if the signer denies it.

Therefore, when the electronic signature is displayed on an electronic document, it can be easily used even for users who are not familiar with the elderly or other electronic documents, while being able to meet the requirements of authenticity (authenticity), integrity and non-repudiation, There has been a demand for measures to secure

Korean Registered Patent No. 10-0729600 (Jun. 12, 2007)

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an electronic signature display method and an electronic signature display device with enhanced security that can overcome the above-described problems.

Another object of the present invention is to provide an electronic signature display method and an electronic signature display device with enhanced security that can satisfy the requirements of authentication (authenticity), integrity, and non-repudiation of an electronic document.

It is still another object of the present invention to provide an electronic signature display method and an electronic signature display device with enhanced security that can prevent forgery or alteration of a signature image.

Another object of the present invention is to provide an electronic signature display method and an electronic signature display device which can be easily used by anyone and can secure reliability.

According to an embodiment of the present invention to achieve some of the above technical problems, a digital signature display method according to the present invention is a method for displaying an electronic signature by inputting a signature for confirmation or authentication of a created electronic document, A first step of generating a signature image; A second step of generating a code image of a predetermined size by using the two-dimensional code generated by encrypting the content information of the electronic document and the unique information of the used terminal; And a third step of synthesizing the code image with the first signature image to generate an authentication image, and displaying the authentication image on a predetermined signature area on the electronic document.

Generating a second signature image in which the background portion is transparent and the transparency of the signature portion is adjusted using the first signature image between the first step and the second step or between the second step and the third step And the third step may generate the authentication image by simultaneously or sequentially synthesizing the code image and the second signature image in the first signature image.

Further comprising generating a QR code for inquiring the content of the electronic document or related information between the second step and the third step, wherein in the third step, the code image, the code image, 2 signature image and the QR code may be concurrently or sequentially combined to generate the authentication image.

The two-dimensional code may be a two-dimensional color code using a plurality of colors.

A plurality of the two-dimensional codes may be repeatedly generated and arranged adjacent to each other to generate the code image.

Wherein the content information of the electronic document includes at least one of document format information of the electronic document, description content information of the electronic document, time information relating to completion of creation of the electronic document or input of a signature, And may include at least any one piece of information.

Wherein the QR code includes information on an Internet site access address related to the electronic document, inquiry number or unique number related to the electronic document, size information of the two-dimensional code and the code image, And the code sequence information of the code sequence information.

According to another embodiment of the present invention, there is provided an electronic signature display apparatus for displaying an electronic signature by inputting a signature for confirmation or authentication of a created electronic document, 1 signature image generating unit for generating a signature image; A code generation unit for generating a two-dimensional code by encrypting the contents of the electronic document, and arranging the two-dimensional code to generate a code image; A synthesizing unit for synthesizing the first signature image and the code image to generate an authentication image; And a display unit for displaying the authentication image in a predetermined signature area on the electronic document.

Wherein the signature image generating unit further generates a second signature image whose background portion is transparent and the transparency of the signature portion is adjusted using the first signature image, and the combining unit adds the code image and the second signature image to the first signature image, 2 signature images may be synthesized simultaneously or sequentially to generate the authentication image.

Wherein the electronic signature display apparatus further comprises a QR code generation section for generating a QR code for inquiring contents of the electronic document and related information, and the combining section adds the code image, the second signature image, And the QR code may be concurrently or sequentially combined to generate the authentication image.

According to another embodiment of the present invention, there is provided a method for displaying an electronic signature, the method comprising: displaying a signature image of a signature input to a terminal for verification or authentication of an electronic document, Dimensional code which is generated by encrypting the content information of the content information of the content information.

According to the present invention, since the signed signature image is combined with the two-dimensional codes for the confirmation and authentication of the electronic document and is contaminated up to the pixel unit, it is difficult to extract only the signature image separately, thereby weakening the intention to steal. In addition, authentication and confirmation of electronic documents are performed through authentication images, so that even in the case of the elderly who are not accustomed to a smart phone or a tablet PC, electronic documents can be easily authenticated and verified, and the electronic documents can be easily used.

In the case of an electronic document in which an authentication image is displayed, it has effects of authenticity (authenticity), integrity, non-repudiation, etc., and contents information of the electronic document and other authentication related information such as two- It is impossible to extract the contents by scanning with a scanner or the like and the context information and the contents information of the electronic document at the time of signing the corresponding electronic document in the code image or the two-dimensional code are encrypted so as to exclude the possibility of forgery or theft have.

FIG. 1 is a schematic block diagram of a security-enhanced digital signature display device according to an embodiment of the present invention,
FIG. 2 is a flowchart showing the digital signature display method using the digital signature display device of FIG. 1 in order;
Figs. 3 to 9 are views showing examples of images for displaying a digital signature,
10 is a diagram showing an example of an electronic document in which an authentication image is displayed.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings without intending to intend to provide a thorough understanding of the present invention to a person having ordinary skill in the art to which the present invention belongs.

FIG. 1 is a schematic block diagram of an electronic signature display apparatus with enhanced security according to an exemplary embodiment of the present invention, FIG. 2 is a flowchart illustrating an electronic signature display method using the electronic signature display apparatus of FIG. 1 in order, Figs. 3 to 9 are views showing examples of respective images for displaying an electronic signature, and Fig. 10 is a diagram showing an example of an electronic document in which an authentication image is displayed.

1, an electronic signature display apparatus 100 according to an exemplary embodiment of the present invention includes a signature image generation unit 110, a code generation unit 120, a composition unit 130, and a display unit 140 Respectively. Each of the signature image generating unit 110, the code generating unit 120, the combining unit 130 and the display unit 140 may be implemented through software embedded in a terminal such as a PC, a tablet PC, or a smart phone .

The electronic document described below may include an electronic document that is created through a terminal such as a PC, a tablet PC, a smart phone, or the like through a display screen of the terminal, and may include a contract in the form of an electronic document, Application documents, real estate contracts, banking contracts, various agreements, various reports, various payment documents, various documents of government offices, various agreements of hospitals, registration documents and documents related to the delivery of courier services, documents related to the issuance of copies of government offices, movies and performances And all other electronic documents that require the signature of the person concerned for verification or certification.

When an electronic document is created through the terminal, signature input is required to confirm or authenticate the electronic document. Typically, the signature is input by the terminal when the associated person signs it through the touch screen. In addition, it is possible to receive a signature via a signer in a manner well known to a mouse or other conventional technician.

For example, in the case of a product purchase contract or an insurance contract, when a contract is created in a terminal such as a tablet PC and the creation is completed, the signature of the contractor is input as a confirmation and authentication means. In this case, When the contractor makes a signature as in a general document, a signature is input to the terminal. In this case, the signature can be recognized and input through a pressure sensor incorporated in the terminal or the like.

The signature image generation unit 110 generates a first signature image 112 as shown in FIG. 3 by imaging the signature input through the terminal. The first signature image 112 may be in the form of an image separated by a white background and a black signature portion (or letter portion). The first signature image 112 may be implemented in the form of an image in the same shape as a signature performed on a general document.

In addition, the signature image generation unit 110 may further generate the second signature image 114 having a background, as shown in FIG. 4, using the first signature image 112. The second signature image 114 is generated as an image in which the background portion except the letter portion (signature portion) corresponding to the signature is transparent. In this case, the transparency of the background portion can be adjusted as needed, and the transparency can be adjusted as necessary even in the case of the signature portion.

The code generation unit 120 encrypts the content information of the electronic document and the unique information of the used terminal, and generates the two-dimensional code 122 as shown in FIG. 5 using the encrypted information.

Wherein the content information of the electronic document includes at least one of document format information of the electronic document, description content information of the electronic document, time information relating to completion of creation of the electronic document or input of a signature, And may include at least any one piece of information.

The document format information of the electronic document is information on the format of the electronic document, for example, whether it is a document using a Korean-language document creating program with an extension of HWP, a document using an MS-WORD program, And the document description information of the electronic document may include information on the entire contents described in the electronic document, compression information, and the like.

The time point information related to the completion of creation of the electronic document or the input of the signature may include information on the creation completion time point of the electronic document, the start time of the signature input, and the completion time of the signature input. The location information related to the signature location of the electronic document includes information on the location where the actual electronic document is created (the place where the contract was made), the location where the signature was made, and the like. The location information for the GPS sensor mounted on the terminal, Position information recognized through a router, position information recognized through a repeater relaying communication of the terminal, and the like.

In addition, the unique information of the terminal may include a unique number of a terminal assigned to the used terminal, a model name, and the like. And other information that can be determined to be unique information of the terminal.

The code generator 120 encrypts the content information of the electronic document and the unique information of the used terminal using a function for generating a hash function or other two-dimensional code, Respectively.

Where the two-dimensional code 122 may comprise a two-dimensional code well known to those of ordinary skill in the art.

The two-dimensional code 122 may be generated as a two-dimensional color code using a plurality of colors to block forgery and forgery of the signature image. When a plurality of colors are used, the elimination of the two-dimensional code 122 through a color filter of a specific color can be blocked, thereby reducing the possibility of theft or forgery.

Since the two-dimensional code 122 is generally formed to be smaller in size than a signature to be performed, a plurality of the two-dimensional codes 122 are repeatedly generated and arranged adjacent to each other to form a watermark in the form of a watermark, Code image 124 can be constructed.

That is, the code image 124 may be composed of one two-dimensional code 122, but a plurality of the code images 124 may be arranged in parallel with one another and may be generated through the code generation unit 120. 6 illustrates the code image 124 generated by arranging a plurality of two-dimensional codes 122 having the same structure, the code image 124 includes a plurality of two-dimensional codes 122 having different structures ). ≪ / RTI >

The reason for generating the code image 124 is that the two-dimensional code 122 and the signature image are superimposed and synthesized as much as possible (or contaminated) to enhance the security, thereby blocking the possibility of forgery or theft of the signature It is for this reason. In addition, since the portion where the two-dimensional code 122 overlaps with the signature may not be recognizable through the reader, the two-dimensional code 122 may have a plurality of array structures in order to secure a recognizable two-dimensional code.

The two-dimensional codes 122 constituting the code image 124 may be generated in the same structure or may have different structures. It is also possible that some have the same structure and some have different structures. FIG. 5 shows examples of two-dimensional codes 122 having different structures.

In this case, the generated two-dimensional codes 122 include generation order information according to the generation order, and may also include array position information on the array position.

When the two-dimensional codes 122 include the generation order information and the arrangement position information, they may be arranged according to the generation order information or the arrangement position information. For example, it is possible to arrange from left to right according to the order of creation and then from top to bottom. If they are arranged according to the array position, they are arranged at the corresponding array position.

The two-dimensional codes 122 arranged to form the code image 124 may be arranged so that the two-dimensional code 122 arranged adjacent thereto is rotated by a predetermined angle (e.g., 90 degrees or 180 degrees) It is possible. For example, in the case where two two-dimensional codes are arranged adjacent to each other, it is possible to arrange the two-dimensional code on the right side by rotating the two-dimensional code on the left side by 90 degrees or 180 degrees.

The combining unit 130 combines the first signature image 112 and the code image 124 to generate an authentication image 132 as shown in FIG.

The synthesized code image 124 may be arranged so that the two-dimensional codes 122 are arranged to form a watermark, but may be formed of one two-dimensional code 122.

The code image 124 is superimposed on the first signature image 112 and synthesized to generate the authentication image 132. At this time, the two-dimensional code 122 and the code image 124 may have a completely transparent background. Also, the transparency can be adjusted as needed in the case of non-background code portions.

In another embodiment, the compositing unit 130 concurrently or sequentially composites the code image 124 and the second signature image 114 in the first signature image 112 to generate the authentication image 132 . For example, after the code image 124 is superimposed on the first signature image 112, the second signature image 114 is superimposed on the synthesized image, It is also possible to generate the authentication image 132.

Where the authenticated image 132 may be a concept that includes both the case where the second signature image 114 is composited together and the case where the second signature image 114 is not composited.

When the code image 124 is synthesized in the first signature image 112, there is a possibility that the sharpness of the signature portion overlapped with the code portion of the code image 124 is degraded, The authenticated image 132 may be generated by further synthesizing the second signature image 114 whose background is transparent and only the signature portion is visible in order to improve the sharpness. At this time, it has already been described that the signature portion of the second signature image 114 can also be adjusted in transparency.

The display unit 140 displays the authentication image 132 in a predetermined signature area on the electronic document. Generally, the authenticated image 132 is displayed in a signature area where a signature is made in a general paper document or an electronic document. It is possible to print or store the electronic document in which the authentication image 132 is displayed, or store it as another file for transfer or possession.

The authenticated image 132 is intended to satisfy both the authenticity of the signature, the integrity, and the requirement to be recognized as a genuine signature, such as a rejection of the signer's denial. Here, satisfying the true nature means that the corresponding signature in the electronic document is for the document (for example, the contract, etc.), and satisfying the integrity means that there is no forgery or alteration in the electronic document , Denial of denial may mean that the signing entity has been prepared for the possibility of denying the signature itself, that is, the signing entity has blocked the possibility of denying the signature itself.

In the case of the present invention, since the electronic signature is included in the authentication image 132 at the same time as the inputting, that is, the digital signature is displayed at the same time as the digital signature is synthesized with the code image 124, It is almost impossible to separate the authentication image 132 from the image 124, and even if the authentication image 132 is leaked by mistake or hacking, reuse becomes difficult.

Since the content information of the electronic document is contained in the two-dimensional code 122 or the code image 124 and the signature image 112 and 114 are combined with the code image 124 to constitute the authentication image 132, Nature, integrity, and non-repudiation.

In the case of the contract, for example, since the contract content and the signature are merged into one authentication image, it is not possible to deny that the signature is related to the contract, so that the two- Time, signing point, and terminal information are stored, so that the conditions of the contract can be known and the requirements of integrity and non-repudiation can be secured since comparison with the corresponding electronic document is possible.

The electronic signature display apparatus 100 may further include a QR code generation unit 150 for generating a QR code 152 as shown in FIG. The QR code 152 is also embodied as a two-dimensional code or a QR code to distinguish it from the two-dimensional code 122 constituting the code image 124.

The QR code generation unit 150 generates a QR code 152 including contents not included in the code image 124 in addition to the contents of the electronic document or related information inquiry, The possibility of falsification of the electronic document or the possibility of falsification of the electronic signature is blocked.

Specifically, the QR code generation unit 150 generates information on an Internet site access address related to the electronic document, an inquiry number or unique number related to the electronic document, and the 2D code 122 and the code image 124, Size information of the two-dimensional code 122 constituting the code image 124 and code arrangement information of the two-dimensional code 122 constituting the code image 124 to generate the QR code 152. [

The QR code 152 is generated in a transparent form, and the transparency of the code portion is adjustable.

In this case, the combining unit 130 simultaneously or sequentially combines the code image 124, the second signature image 114, and the QR code 152 in the first signature image 112, , And the display unit 140 displays the authentication image 134 in a predetermined signature area on the electronic document, as shown in FIG. It is possible to print or store the electronic document in which the authentication image 134 is displayed, or to store it as another file for transfer or possession.

The QR code 152 may include information about an Internet site access address (URL) that can inquire additional information or reference data related to the electronic document but can not be displayed in the electronic document, Can be stored.

The above additional information may include contract contents, A / S information, usage method and sales information, user's manual, similar product information, etc. in the case of purchase of the product, and the durability, point information, And the like.

In addition, the inquiry number or unique number related to the electronic document may be encrypted and stored in the QR code 152 in order to supplement the code image 124.

That is, the QR code 152 may divide the electronic document related contents information with the code image 124 and store the contents. More specifically, the content information of the electronic document is stored in the code image 124, but the inquiry number related to the electronic document and the unique number of the electronic document may be encrypted and stored in the QR code 152. For example, if the electronic document is a contract, the contract number may be encrypted and stored. Accordingly, when recognizing the QR code 152, it is possible to access the site related to the electronic document through the inquiry number or the unique number.

The size information of the two-dimensional code and the size information of the code image 124 may be stored in the QR code 152. Also, code array information which is information on the arrangement method of the two-dimensional codes 122 constituting the code image 124 or information on the arrangement structure can be stored.

The size information of the two-dimensional code 122 may include a length and a width of the two-dimensional code 122. The size of the two-dimensional code 122 may be circular or other than a rectangular or square structure. (E.g., diameter, diagonal length, and the like) that can confirm the size in the case of a structure of a shape.

The size information of the code image 124 may include the number of the two-dimensional codes 122 arranged along with the size information of the two-dimensional code 122 constituting the code image 124 (for example, A start position of the code image 124, and a total size information of the code image 124. [0031]

The reason for storing the size information and the code arrangement information of the code image 124 in the QR code 152 is that the size information of the code image 124 and the size information of the two- The code image 124 and the two-dimensional code 122 can be easily recognized through the arrangement information.

That is, it is possible to check the size of the code image 124, the size of the two-dimensional code 122 and the code arrangement information through the recognition of the QR code 152. In this case, It is possible to easily divide the code image 124 into respective two-dimensional codes through the arrangement of the code images 124 or the arrangement structure, It is possible to select any two-dimensional code 122 and recognize it. Even if the selected two-dimensional code is lost due to the synthesis with the signature images 112 and 114 and thus can not be recognized, it is possible to easily select and re-recognize other two-dimensional codes at random through the size or code arrangement information.

Another reason for encrypting and storing size information and code arrangement information of the code image 124 in the QR code 152 is to check whether the code image 124 or the digital signature is forged or tampered with . That is, when the code image 124 is stolen or copied, it is possible to check and grasp the size information or code arrangement information of the code image 124 stored in the QR code 152. That is, the total size, starting position, code array structure, etc. of the code image 124 are identified through the QR code 152 and compared with the size, starting position, and code array structure of the actually displayed code image 124, It is possible to grasp whether or not it is illegal. Also, even when the QR code 152 is forged and steal a URL, it is possible to detect whether or not the URL is corrupted through a dedicated scanner.

The QR code 152 may be generated through the code generation unit 120 without the QR code generation unit 150. The QR code 152 may be replaced with another kind of two-dimensional code.

In the case of the QR code 152, after the transparency is adjusted and synthesized, only the QR code alone can be extracted or the possibility of forgery modulation can be blocked. For example, it is possible to reduce the transparency of the code portion of the QR code 152 to 80% to 90% of the basic amount, thereby preventing the extraction of the code and the possibility of forgery or falsification while preventing the recognition.

Hereinafter, an electronic signature display method according to an embodiment of the present invention will be described with reference to FIG.

As shown in FIG. 2, when an electronic document is created according to various contracts or other necessities (S110), the signature of the relevant person for confirmation or authentication is inputted through the touch screen of the terminal or other method (S112) .

In step S114, the signature image generator 110 generates the first signature image 112 by imaging the input signature in a first step.

In the second step, the code generation unit 120 generates the two-dimensional code 122 by encrypting the content information of the electronic document and the unique information of the terminal used. The two-dimensional codes 122 are repeatedly generated and arranged adjacent to each other to generate the code image 124 of a predetermined size (S116). The two-dimensional code 122 may be generated at the same time as the first signature image 112 and may be generated after the generation of the first signature image 112.

When the code image 124 is generated, in the third step, the code image 124 is synthesized with the first signature image 112 through the synthesis unit 130 to generate the authentication image 132 (S118).

When the authentication image 132 is generated, the authentication image 132 is displayed in a predetermined signature area on the electronic document through the display unit 140 in a fourth step S120.

In this case, the authentication image 132 may be regarded as a combination of the signature image 112 and at least one two-dimensional code generated by encrypting the content information of the electronic document.

In another embodiment, a second signature image (114) with a transparent background is created using the first signature image (112) between the first step and the second step, or between the second step and the third step The method comprising the steps of: In this case, in the third step, the code image 124 and the second signature image 114 are concurrently or sequentially synthesized in the first signature image 112 to generate the authentication image 132, And displayed in the signature area in step 4.

In yet another embodiment, the method may further comprise, between the second step and the third step, generating the QR code 152 for inquiring the content of the electronic document or related information. The second signature image 114, and the QR code 152 in the first signature image 112 when the QR code 152 is generated, The authentication image 134 is generated simultaneously or sequentially, and the authentication image 134 is displayed in the signature area in the fourth step.

Since the code image 124 is also a two-dimensional code, the authentication image 134 can be generated by the signature image 112 or 114 in the case where the content information of the electronic document is encrypted Dimensional code or a plurality of two-dimensional codes generated by the two-dimensional code.

The electronic document in which the authentication images 132 and 134 are displayed can be provided to the signer, the contractor, and the like through a PDF file, a print, or a dedicated application program.

As described above, when the authentication images 132 and 134 are generated and displayed as a method of displaying an electronic signature, since the signature images 112 and 114 are combined with the two-dimensional codes 122 and 152 and are contaminated up to the pixel unit, It is difficult to extract it, so that it has the effect of weakening the intent to steal.

The signature image of the signer is merged with the contents information of the electronic document stored in the code image 124 and the QR code 152 and the signature data of the electronic signature Since the unique information of the terminal used and the like are stored, it is possible to grasp the context or the situation related to the creation of the electronic document, and it can not be denied that the signature is the signature performed on the electronic document.

In the case of an electronic document in which the authentication images 132 and 134 are displayed, there is a strong presumption that the authentication images 132 and 134 themselves are genuine, and the two-dimensional code 122, And the QR code 152, it is possible to know contents information and other context information of the electronic document, thereby ensuring integrity. Specifically, since the authentication images 132 and 134 of the present invention are generated by synthesizing the signature image and the code image at the moment when the signature is completed, at least the corresponding electronic document exists at the time of signing by the signing party, It can be assured that no change has been made to it.

According to the present invention, authentication or confirmation of an electronic document is performed through the authentication images 132 and 134 described above. Therefore, even in the case of an elderly person who is not familiar with a smart phone or a tablet PC, There is an advantage that it can be used easily. In addition, contents information of electronic document and other authentication related information such as 2D code and QR code are encrypted and it is impossible to extract contents by scanning with general purpose scanner or the like, and it is impossible to extract contents by code image or two- The content information of the electronic document is encrypted, and the possibility of forgery or theft can be excluded.

The foregoing description of the embodiments is merely illustrative of the present invention with reference to the drawings for a more thorough understanding of the present invention, and thus should not be construed as limiting the present invention. It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the basic principles of the present invention.

110: a signature image generation unit 120;
130; Combining section 140: display section
150: QR code generator

Claims (11)

A digital sign display method comprising:
A first step of generating a first signature image by imaging an input signature when a signature for confirmation or authentication of the created electronic document is input using a digital pen or a finger;
A second step of generating one or a plurality of two-dimensional codes obtained by encrypting the content information of the electronic document and the unique information of the terminal used, the background being transparent, and generating a code image of a predetermined size using the two- Wow;
Generating an authentication image in the form of contaminating the signed character portion of the first signature image by superimposing the code image on the first signature image to prevent tampering of the first signature image capable of handwriting confirmation, And displaying the authentication image on a predetermined signature area on the electronic document. The method according to claim 1,
Generating a second signature image in which the background portion is transparent and the transparency of the signature portion is adjusted using the first signature image between the first step and the second step or between the second step and the third step Further comprising:
In the third step, the code image is superimposed on the first signature image to contaminate the signed letter portion of the first signature image, and the second signature image on the code image overlapped with the first signature image, To generate the authentication image in a form in which the sharpness of the signature portion is improved. The method of claim 2,
Further comprising generating a QR code for inquiring contents of the electronic document or related information between the second step and the third step,
Wherein in the third step, the code image, the second signature image, and the QR code are concurrently or sequentially combined with the first signature image to generate the authentication image. The method according to any one of claims 1 to 3,
Wherein the two-dimensional code is a two-dimensional color code using a plurality of colors. The method of claim 2,
Wherein when a plurality of the two-dimensional codes are generated, a plurality of the two-dimensional codes are repeatedly generated and arranged adjacent to each other to generate the code image. The method of claim 2,
Wherein the content information of the electronic document includes at least one of document format information of the electronic document, description content information of the electronic document, time information relating to completion of creation of the electronic document or input of a signature, Wherein the digital signature includes at least any one of information. The method of claim 3,
Wherein the QR code includes information on an Internet site access address related to the electronic document, inquiry number or unique number related to the electronic document, size information of the two-dimensional code and the code image, And the code arrangement information of the digital signature is generated. An electronic signature display device comprising:
A signature image generating unit for generating a first signature image by imaging an input signature when a signature for confirmation or authentication of the created electronic document is inputted using a digital pen or a finger;
A code generation unit that generates one or a plurality of two-dimensional codes obtained by encrypting the content information of the electronic document and the unique information of the terminal used, the background being transparent, and generating a code image of a predetermined size using the generated two- Wealth;
A method of generating an authentication image in the form of a contaminated signature portion of a signature image of a first signature image by superimposing the code image on the first signature image to prevent tampering of the first signature image, Wealth;
And a display unit for displaying the authentication image in a predetermined signature area on the electronic document. The method of claim 8,
Wherein the signature image generating unit further generates a second signature image in which the background portion is transparent and the transparency of the signature portion is adjusted using the first signature image,
Wherein the compositing unit overlaps the code image on the first signature image to contaminate the signed letter portion of the first signature image and superimposes the second signature image on the code image overlaid with the first signature image, And generates the authentication image in a form in which the sharpness of the signature portion is improved. The method of claim 9,
The electronic signature display apparatus further comprises a QR code generation unit for generating a QR code for inquiring contents of the electronic document and related information,
Wherein the combining unit simultaneously or sequentially combines the code image, the second signature image, and the QR code in the first signature image to generate the authentication image. delete
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