System and method for identifying user signature forgery using blockchain

Abstract

Disclosed are a system and a method for identifying user signature forgery using a blockchain. The system and method for identifying user signature forgery using a blockchain may include: a first device for recognizing biometric information of a user and generating a signature, written in a document, of the user whose biometric information was recognized, as first digital information; a second device for generating second digital information for scanning the signature written in the document; and a process for receiving, from the first device, signature information, including personal information of the user whose biometric information was recognized, the first digital information, and information about the time when the signature was made, encrypting the signature information through blockchain technology, receiving the second digital information from the second device, and determining whether the second digital information and the encrypted signature information match.

Description

System and method for verifying user signature forgery using blockchain

[0001] The present invention relates to a system and method for verifying forgery of a user signature using a blockchain, and more specifically, to a system and method for verifying forgery of a user signature using a blockchain capable of verifying forgery of a user signature.

[0002] Financial contracts, such as deposit requests, loan agreements, and various transaction applications from banks, insurance companies, mobile phone subscription applications from mobile carriers, and prescriptions, are all conducted in writing, and the signatures of the contract holder or document issuer are included on the documents. These signatures are susceptible to forgery and falsification, which can result in damages and losses. For example, prescriptions are often handwritten, and the lack of a system to effectively verify and manage their authenticity leads to persistent cases of drug misuse due to forged prescriptions.

[0003] To detect forgery of these signatures, various technologies are being developed. Conventional technologies capable of detecting signature forgery include a terminal equipped with a stylus pen to authenticate the user's signature during credit card payments, and a blockchain server that stores and manages authentication keys.

[0004] However, the former is vulnerable to security issues as it can be forged by imitating the signature, and the latter has the problem of causing inconvenience to users due to the one-time password that changes periodically, and research is required to solve this problem.

[0005] The present invention provides a system and method for verifying forgery of a user signature using a blockchain capable of verifying whether a signature written in various documents is forged.

[0006] The system for verifying forgery of a user signature using a blockchain of the present invention may include a first device that recognizes a user's biometric information and generates a signature of the user whose biometric information is recognized as being recorded in a document as first digital information; a second device that generates second digital information that scans the signature recorded in the document; and a process for receiving, from the first device, signature information including personal information of the user whose biometric information is recognized, the first digital information, and time information of the signature, encrypting the signature information using blockchain technology, receiving the second digital information from the second device, and determining whether the second digital information matches the encrypted signature information.

[0007] In addition, the first device may include a housing having a shape that the user can hold by hand; a biometric information recognition sensor provided in the housing that recognizes biometric information of the user; and a user recognition unit that recognizes the user by comparing the biometric information recognized by the biometric information recognition sensor with previously stored information.

[0008] Additionally, the biometric information recognition sensor may include a vein recognition sensor that scans a vein from the user's hand; and a microphone sensor that receives a voice signal from the user.

[0009] In addition, the first device may include a signature printing unit provided on the bottom surface of the housing and printing a signature of a user whose biometric information has been recognized on a document, wherein the signature printed by the signature printing unit may include a user identification unit designated by the user whose biometric information has been recognized; and a code identification unit in which personal information of the user whose biometric information has been recognized and signature time information have been encrypted.

[0010] In addition, the first device further includes a pencil portion that can be placed on the housing, wherein the pencil portion comprises: a body having a pen tip provided at a tip end; a camera provided on the body that photographs an area that the pen tip signs; a motion detection sensor that detects three-dimensional movement of the body; and the first digital information can be generated through an image received from the camera and a three-dimensional movement signal provided from the motion detection sensor.

[0011] Additionally, the first device may further include a moving roller provided on the bottom surface of the housing and rotating along the ground at a preset speed.

[0012] In addition, the second device may include an image sensor that scans a signature written on the document to generate the second digital information; an input unit that inputs information written on the document; and a communication unit that is capable of communicating with the process and transmits the second digital information scanned by the image sensor and the information written on the document to the process.

[0013] In addition, the process may include a step of comparing information entered in the input unit with personal information of the user whose biometric information was recognized and information on the time at which the signature was made; and a step of comparing the first digital information with the second digital information if the information written in the document matches personal information of the user whose biometric information was recognized and information on the time at which the signature was made.

[0014] In addition, the method may include: recognizing a user's biometric information through a first device and verifying the user; generating a signature of the user whose biometric information is recognized as written on a document through the first device as first digital information; receiving signature information including personal information of the user whose biometric information is recognized, the first digital information, and time information of the signature, and encrypting the signature information through a blockchain technology built into the process; scanning the signature written on the document through a second device to generate second digital information; and receiving the second digital information and determining whether the second digital information and the encrypted signature information match through the process.

[0015] Additionally, the biosignal may include a vein signal recognized from the user's hand; and a voice signal of the user.

[0016] In addition, the method further includes a step of printing a signature of a user whose biometric information has been recognized through the first device on a document, wherein the user's signature may include a user identification portion designated by the user whose biometric information has been recognized; and a code identification portion in which personal information of the user whose biometric information has been recognized and signature time information have been encrypted.

[0017] In addition, the step of generating the signature of the user whose biometric information is recognized as first digital information may include generating an image by photographing the signature area through a camera provided in the pencil unit while the user is signing using the pencil unit, detecting the three-dimensional movement of the pencil unit to generate a three-dimensional movement signal, and generating the first digital information through the image and the three-dimensional movement signal.

[0018] According to the present invention, it is possible to confirm forgery of signatures written in various documents.

[0019] FIG. 1 is a diagram showing the configuration of a user signature forgery verification system using blockchain according to an embodiment of the present invention.

[0020] FIG. 2 is a drawing showing the first device and the second device of FIG. 1.

[0021] Fig. 3 is a drawing showing a detailed configuration of the first device of Fig. 1.

[0022] Fig. 4 is a perspective view showing the first device of Fig. 1.

[0023] Figure 5 is a drawing showing the housing of Figure 4 as viewed from the rear.

[0024] Fig. 6 is a drawing showing the bottom surface of the housing of Fig. 3.

[0025] FIG. 7 is a drawing showing biometric information of a user recognized by a user recognition unit according to one embodiment of the present invention.

[0026] FIG. 8 is a drawing showing a signature mark generated by a signature mark generation unit according to an embodiment of the present invention.

[0027] Figure 9 is a drawing showing the process of printing a signature mark in the signature printing unit of the present invention.

[0028] Fig. 10 is a drawing showing a detailed configuration of a pencil portion according to one embodiment of the present invention.

[0029] FIG. 11 is a drawing showing a detailed configuration of a second device according to an embodiment of the present invention.

[0030] FIG. 12 is a drawing showing a detailed configuration of a server according to an embodiment of the present invention.

[0031] FIG. 13 is a diagram showing second digital information generated according to one embodiment of the present invention.

[0032] Figure 14 is a flowchart illustrating a method for verifying forgery of a user signature using a blockchain according to one embodiment of the present invention.

[0033] Figure 15 is a drawing showing the process of a user signing a document using a pencil.

[0034] FIG. 16 is a diagram showing a process for determining the authenticity of signature information according to one embodiment of the present invention.

[0035] Figure 17 is a flowchart illustrating a method for verifying forgery of a user signature using a blockchain according to another embodiment of the present invention.

[0036] FIG. 18 is a diagram showing a process for determining the authenticity of signature information according to another embodiment of the present invention.

[0037] The system for verifying forgery of a user signature using a blockchain of the present invention may include a first device that recognizes a user's biometric information and generates a signature of the user whose biometric information is recognized as being recorded in a document as first digital information; a second device that generates second digital information that scans the signature recorded in the document; and a process for receiving, from the first device, signature information including personal information of the user whose biometric information is recognized, the first digital information, and time information of the signature, encrypting the signature information using blockchain technology, receiving the second digital information from the second device, and determining whether the second digital information matches the encrypted signature information.

[0038] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, the technical concept of the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete and to sufficiently convey the spirit of the present invention to those skilled in the art.

[0039] In this specification, when a component is referred to as being on another component, it means that it can be formed directly on the other component, or a third component may be interposed between them. In addition, in the drawings, the thicknesses of films and regions are exaggerated for the purpose of effectively explaining the technical contents.

[0040] Also, although terms such as first, second, and third have been used to describe various components in various embodiments of this specification, these components should not be limited by these terms. These terms are only used to distinguish one component from another. Thus, what is referred to as a first component in one embodiment may be referred to as a second component in another embodiment. Each embodiment described and illustrated herein also includes its complementary embodiments. Also, the term "and / or" has been used herein to mean including at least one of the components listed before and after.

[0041] In the specification, singular expressions include plural expressions unless the context clearly dictates otherwise. In addition, terms such as "comprise" or "have" are intended to specify the presence of a feature, number, step, component, or combination thereof described in the specification, and should not be construed as excluding the presence or addition of one or more other features, numbers, steps, components, or combinations thereof. In addition, the term "connection" is used in the present specification to mean both indirectly connecting multiple components and directly connecting them.

[0042] In addition, when describing the present invention below, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

[0043]

[0044] FIG. 1 is a diagram showing the configuration of a user signature forgery / alteration confirmation system (10) using a blockchain according to an embodiment of the present invention, FIG. 2 is a diagram showing a first device (100) and a second device (200) of FIG. 1, FIG. 3 is a diagram showing a detailed configuration of the first device (100) of FIG. 1, FIG. 4 is a perspective view showing the first device (100) of FIG. 1, FIG. 5 is a diagram showing a housing (110) of FIG. 4 as viewed from the rear, and FIG. 6 is a diagram showing a bottom surface (112) of the housing (110) of FIG. 3.

[0045] Referring to FIGS. 1 to 6, the blockchain-based user signature forgery verification system (10) of the present invention can verify the authenticity of a user's signature entered on a document using blockchain technology. The blockchain-based user signature forgery verification system (10) includes a first device (100), a second device (200), and a server (300).

[0046] The first device (100) recognizes the user's biometric information and generates a signature entered by the user on a document, using the biometric information, as first digital information. The first digital information includes personal information of the user whose biometric information was recognized, the date and time the document was signed, and image information of the signature entered on the document.

[0047] The first device (100) includes a housing (110), a moving roller (119), a biometric information recognition sensor (120), a data storage unit (130), a user recognition unit (140), a signature image generation unit (150), a signature printing unit (160), a pencil unit (170), a first digital information generation unit (180), and a communication unit (190).

[0048] The housing (110) has a shape that can be held by a user's hand and is provided as the body (171) of the first device (100). The housing (110) has a shape that becomes wider from the top to the bottom and includes a side surface (111), a bottom surface (112), and an upper surface (113).

[0049] The side (111) is an area that the user can hold with their hand, and is provided with a curved surface for easy holding with their hand.

[0050] The bottom surface (112) is placed on the ground as a flat plane. According to an embodiment, the bottom surface (112) may be provided with a circular perimeter.

[0051] The upper surface (113) is provided as a flat surface. A receiving space (114) is formed on the upper surface (113). The receiving space (114) is formed at a predetermined depth from the upper surface (113). A display unit (115) may be provided on the upper surface (113). The display unit (115) may extend from the upper surface (113) of the housing (110) to the front. Various information may be displayed on the display unit (115).

[0052] At least two moving rollers (119) are provided on the bottom surface (112) of the housing (110). When a user holds the housing (110) and moves it in the forward and backward directions, the moving rollers (119) rotate at a preset speed. The moving rollers (119) come into contact with the ground and roll along the ground. The moving rollers (119) rotate at a constant speed regardless of the speed and force with which the user pushes the housing (110). As a result, the housing (110) can be moved at a constant speed. To this end, a driving unit for rotating the moving rollers (119) at a constant speed may be provided inside the housing (110).

[0053] A biometric information recognition sensor (120) is provided in the housing (110) and recognizes the user's biometric information through the user's pre-stored body information and / or voice information.

[0054] Biometric information refers to information measured from the user's body, and includes at least one of pulse, body temperature, fingerprints, veins, and voice information. In an embodiment, the biometric information recognition sensor (120) can recognize the user's vein information and voice information.

[0055] The biometric information recognition sensor (120) includes a vein recognition sensor (121) and a microphone sensor (122).

[0056] A vein recognition sensor (121) is provided with a predetermined area on the side (111) of the housing (110). The vein recognition sensor (121) comes into contact with the user's palm and scans the veins provided on the user's palm.

[0057] A microphone sensor (122) is provided inside the housing (110) and recognizes a user's voice signal. A plurality of holes may be provided on the side (111) of the housing (110) so that the user's voice signal can be easily introduced into the microphone sensor (122). The microphone sensor (122) can recognize when the user pronounces a predetermined word.

[0058] The data storage unit (130) stores the personal information and biometric information of a previously registered user. The user's personal information includes the user's name, date of birth, address, company name, department name, and position. The user's biometric information includes the user's vein information and voice information.

[0059] The user recognition unit (140) recognizes a user by comparing the biometric information recognized by the biometric information recognition sensor (120) with the biometric information previously stored in the data storage unit (130). The user recognition unit (140) can identify a user by comparing the vein information received by the vein recognition sensor (121) and the voice information received by the microphone sensor (122) with the vein information and voice information stored in the data storage unit (130).

[0060] FIG. 7 is a diagram showing biometric information of a user recognized by a user recognition unit (140) according to one embodiment of the present invention. (a) of FIG. 7 shows the user's vein information (20) recognized by the user recognition unit (140), and (b) shows the user's voice information (30) recognized by the user recognition unit (140).

[0061] Referring to FIG. 7, the user recognition unit (140) compares the vein information recognized by the biometric information recognition sensor (120) with the user's vein information (20) previously registered in the data storage unit (130), and identifies the user by comparing the voice information (30) recognized by the microphone sensor (122) with the voice information (30) previously registered in the data storage unit (130).

[0062] Specifically, the user recognition unit (140) compares the user's vein scanned by the vein recognition sensor (121) with the user's vein information already registered in the data storage unit (130) by comparing the branching angles of the veins. Then, the user's voice information (30) recognized by the microphone sensor (122) is compared with the MFCC of the user's voice information (30) registered in the data storage unit (130) to confirm whether they match. The user recognition unit (140) recognizes the user as a registered user if the user's vein information (20) and voice information (30) match the already registered information, and recognizes the user as not a registered user if at least one of the vein information and the voice information (30) is different from the already registered information.

[0063] The signature mark generation unit individually generates a signature mark image based on user information. The signature mark generation unit generates signature information as a signature mark in real time.

[0064] FIG. 8 is a drawing showing a signature mark (40) generated by a signature mark generation unit according to one embodiment of the present invention.

[0065] Referring to FIG. 8, the signature mark (40) may include a user mark portion (151) and a code mark portion (152). The user mark portion (151) is displayed as an image that a user whose biometric information has been recognized can designate in place of a signature, and the code mark portion (152) displays the personal information of the user whose biometric information has been recognized, the signing time, and the information on the document being signed, encrypted as a code. According to an embodiment, the code mark portion (152) may be displayed as a QR code.

[0066] A signature printing unit (160) is provided on the bottom surface (112) of the housing (110) and is positioned at a predetermined distance from the moving roller (119). The signature printing unit (160) prints a signature mark (40) of a user whose biometric information has been recognized on a document. The printing method of the signature printing unit (160) may be an inkjet method.

[0067] Figure 9 is a drawing showing the process of printing a signature mark (40) in the signature printing unit (160) of the present invention.

[0068] Referring to FIG. 9, the signature printing unit (160) can print a signature mark (40) while the housing (110) moves forward and backward by the moving roller (119). At this time, since the moving roller (119) rotates at a constant speed regardless of the speed and force with which the user (11) pushes the housing (110), the signature mark (40) can be printed on the document (50) in a constant size and shape.

[0069] Referring again to FIG. 2, the pencil portion (170) can be placed in the receiving space (114) of the housing (110). The user can directly write a signature on a document using the pencil portion (170). The pencil portion (170) generates image information of the signature written by the user on the document.

[0070] Fig. 10 is a drawing showing a detailed configuration of a pencil portion (170) according to one embodiment of the present invention.

[0071] Referring to FIG. 10, the pencil part (170) includes a body (171), a pen tip (172), a pressure sensor (173), a camera (174), a motion detection sensor (175), and an information generation part (176).

[0072] The body (171) is provided with a predetermined length and has a diameter corresponding to the receiving space (114) of the housing (110).

[0073] The pen tip (172) is provided at the tip of the body (171) and can discharge ink to write.

[0074] A pressure sensor (173) is provided inside the body (171) and measures the pressure applied to the pen tip (172). The pressure sensor (173) is located at the rear of the pen tip (172) and measures the pressure applied to the pen tip (172) when the user writes a signature.

[0075] A camera (174) is provided on the front of the body (171) and photographs the area where the pen tip (172) signs.

[0076] A motion detection sensor (175) is provided inside the sea and detects three-dimensional movement of the body (171). The motion detection sensor (175) includes a three-axis acceleration sensor.

[0077] The information generation unit (176) generates image information of the signature written by the user on the document using information measured through the pressure sensor (173), the camera (174), and the motion detection sensor (175). The information generation unit (176) calculates the movement path of the pen tip (172) and the force with which the pen tip (172) presses the document through the image received from the camera (174), the movement of the body (171) received from the motion detection sensor (175), and the pressure of the pen tip (172) received from the pressure sensor (173), thereby generating image information of the user's signature. The information generation unit (176) transmits the generated image information of the user's signature to the first digital information generation unit (180).

[0078] Referring again to FIG. 3, the first digital information generation unit (180) generates first digital information including the user's personal information, information on the date and time of signing the document, image information of the signature, or a signature mark generated from the signature mark generation unit. The first digital information generation unit (180) has built-in time information, and can generate the date and time of signing the document using the image information of the signature or the date and time of receiving the signature mark.

[0079] The communication unit (190) can communicate with the server (300) and transmits the first digital information generated from the first digital information generation unit (180) to the server (300).

[0080] The second device (200) generates second digital information from a document whose signature requires verification. The second digital information includes information about the document containing the signature, the date information recorded on the document, the signer's personal information, and the signature information. The second device (200) may be a portable communication device capable of rapid verification. In an embodiment, the second device (200) may be a smartphone, tablet PC, laptop, or the like.

[0081] FIG. 11 is a drawing showing a detailed configuration of a second device (200) according to an embodiment of the present invention.

[0082] Referring to FIG. 11, the second device (200) includes an image sensor (210), an input unit (220), a second digital information generation unit (20), and a communication unit (240).

[0083] The image sensor (210) scans the signature written on the document to create an image of the signature information.

[0084] The input unit (220) is provided as a means for a user wishing to verify the authenticity of a signature to input information contained in a document. According to an embodiment, the user may input information regarding the document containing the signature, the date contained in the document, and the signer's personal information.

[0085] The second digital information generation unit (230) generates second digital information including an image generated from an image sensor (210) and information input to the input unit (220).

[0086] The communication unit (240) can communicate with the server (300). The communication unit (240) transmits the second digital information to the server (300). In addition, the result of reading the authenticity of the signature written on the document is transmitted from the server (300).

[0087]

[0088] FIG. 12 is a drawing showing a detailed configuration of a server (300) according to an embodiment of the present invention.

[0089] Referring to FIG. 12, the server (300) includes a communication unit (310), a data storage unit (320), and a data processing unit (330).

[0090] The communication unit (310) receives first digital information from the first device (100) and second digital information from the second device (200). The communication unit (310) transmits the result of determining whether a signature written on a document is authentic to the second device (200).

[0091] The data storage unit (320) stores the first digital information encrypted in the data processing unit (330).

[0092] The data processing unit (330) encrypts the first digital information received from the first device (100) using blockchain technology. The data processing unit (330) encrypts the user's personal information, the date and time of signing the document, the image information of the signature, or the signature mark using the blockchain algorithm ERC-721 and converts it into an NFT. This allows each user's first digital information to be generated as an NFT, providing each user with a uniquely identifiable individual NFT.

[0093] When second digital information is received, the data processing unit (330) compares the signature image included in the second digital information with the image information or signature mark included in the first digital information to determine whether the signature image included in the second digital information is authentic.

[0094] Specifically, the data processing unit (330) searches for first digital information stored in the data storage unit (320) that matches the signer's personal information, signature date and time information contained in the second digital information. Then, the signature image or signature mark contained in the searched first digital information is compared with the signature image contained in the second digital information to determine whether the signature image contained in the second digital information is authentic.

[0095] FIG. 13 is a diagram showing second digital information generated according to one embodiment of the present invention.

[0096] Referring to FIG. 13, the second digital information may include image information (80) of the signer's signature or a signature mark (40), the signer's personal information (60), signature date information (70), etc.

[0097]

[0098] Hereinafter, a method for confirming forgery of a user signature using the user signature forgery confirmation system (10) using the above-described blockchain will be described in detail.

[0099] Figure 14 is a flowchart illustrating a method for verifying forgery of a user signature using a blockchain according to one embodiment of the present invention.

[0100] Referring to FIG. 14, a method for verifying forgery of a user signature using a blockchain includes a user verification step, a first digital information generation step, a signature information encryption step, a second digital information generation step, and a step for determining whether the signature information is authentic.

[0101] The user verification step recognizes the user by recognizing the user's biometric information through the first device (100). Specifically, the user verification step involves the user touching the palm of the hand to the vein recognition sensor (121) provided in the housing (110), and the vein recognition sensor (121) recognizes the user's palm vein. Then, when the user pronounces a pre-arranged word, the user's voice signal is received through the microphone.

[0102] The user's vein information (20) recognized by the vein recognition sensor (121) and the user's voice information received by the microphone sensor (122) are transmitted to the user recognition unit (140), and the user recognition unit (140) compares the user's vein information and voice information registered in the data storage unit (130) to identify whether the user is a registered user.

[0103] The first digital information generation step generates the user's personal information recognized by the first device (100), the date and time information of signing the document, and the image information of the signature written on the document as first digital information.

[0104] Figure 15 is a drawing showing a process in which a user (11) signs a document (50) using a pencil portion (170).

[0105] Referring to FIG. 15, when a user (11) writes a signature on a document (50) using a pencil unit (170), an information generation unit (176) generates image information of the user's (11) signature from an image captured by a camera (174), the movement of the body (171) received by a motion detection sensor (175), and the pressure of the pen tip (172) received by a pressure sensor (173). The generated image information of the signature is transmitted to a first digital information generation unit (180). The first digital information generation unit (180) generates first digital information including the image information of the signature generated by the information generation unit (176), personal information of the user (11), and date and time information of the time when the user signed using the pencil unit (170).

[0106] Referring again to FIG. 14, the signature information encryption step encrypts the first digital information received from the first device (100) to the server (300) using blockchain technology built into the process. Specifically, the communication unit (190) of the first device (100) transmits the first digital information to the communication unit (310) of the server (300), and the data processing unit (330) encrypts the first digital information using the blockchain algorithm ERC-721, converts it into an NFT, and stores it in the data storage unit (320).

[0107] The second digital information generation step generates second digital information by scanning a signature written on a document through a second device (200). Specifically, the user can scan a document requiring verification of the authenticity of a signature through an image sensor (210) of the second device (200) to generate an image of the signature information. In addition, the user can input document information, written date information, and signatory information written on the document requiring verification of the authenticity of the signature through an input unit (220). The second digital information generation unit (230) generates a second digital image including the image information generated from the image sensor (210) and the document information including the signature entered through the input unit (220), the date information written on the document, and the signatory's personal information.

[0108] Fig. 16 is a diagram illustrating a process for determining the authenticity of signature information according to an embodiment of the present invention. Fig. 16 (a) shows a determination result (90) when the signature images (80) match, and (b) shows a determination result (90) when the signature images (80) do not match.

[0109] Referring to FIG. 16, the step of determining whether the signature information is authentic is to compare the signature image (80) included in the second digital information with the image information included in the first digital information when the second digital information is received from the second device (200) to the server (300), thereby determining whether the signature image (80) included in the second digital information is authentic.

[0110] Specifically, the step of determining whether the signature information is authentic is to search for first digital information among the first digital information stored in the data storage unit (130), in which the signer's personal information, signature date and time information included in the second digital information match the signer's personal information, signature date and time information included in the second digital information. Then, the signature image included in the searched first digital information is compared with the signature image (80) included in the second digital information, to determine whether the signature image (80) included in the second digital information is authentic. If the signature image (80) included in the first digital information matches the signature image (80) included in the second digital information, the signature information written in the document is determined to be a signature actually written by the user. The determination result (90) is transmitted to the second device (200) through the communication unit.

[0111] Figure 17 is a flowchart illustrating a method for verifying forgery of a user signature using a blockchain according to another embodiment of the present invention.

[0112] Referring to FIG. 17, a method for verifying forgery of a user signature using a blockchain includes a user verification step, a signature mark output step, a first digital information generation step, a signature information encryption step, a second digital information generation step, and a step for determining whether the signature information is authentic.

[0113] Except for the signature mark output step among the steps in Fig. 17, the remaining steps are provided in the same manner as those described in Fig. 14, so a detailed description is omitted.

[0114] The signature mark output step prints a user-specified signature mark on a document through the signature mark printing unit. If a user recognized by the first device (100) wishes to print a signature mark instead of a signature on a document, the user designates an image to be used as a signature mark in the user mark unit (151). Then, the user's personal information, signing time, and signed document information are encrypted into a code in the code mark unit (152) and printed in real time along with the signature mark.

[0115] Fig. 18 is a diagram illustrating a process for determining the authenticity of signature information according to another embodiment of the present invention. Fig. 18 (a) shows the judgment result (90) when the signature marks (40) match, and (b) shows the judgment result (90) when the signature marks (40) do not match.

[0116] Referring to FIG. 18, the step of determining whether the signature mark (40) is authentic is to determine whether the signature mark (40) included in the second digital information is authentic by comparing the signature mark (40) included in the second digital information with the signature mark (40) included in the first digital information when the second digital information is received from the second device (200) to the server (300).

[0117] Specifically, the step of determining the authenticity of the signature mark (40) searches for first digital information among the first digital information stored in the data storage unit (130), in which the personal information of the signer, the signature date and time information, and the personal information of the signer, the signature date and time information included in the second digital information match. Then, the signature mark (40) included in the searched first digital information is compared with the signature mark (40) included in the second digital information, to determine whether the signature mark (40) included in the second digital information is authentic. If the signature mark (40) included in the first digital information and the signature mark (40) included in the second digital information match, the signature information written in the document is determined to be a signature actually written by the user. The determination result (90) is transmitted to the second device (200) through the communication unit.

[0118]

[0119] While the present invention has been described in detail using preferred embodiments, the scope of the present invention is not limited to the specific embodiments described above, and should be interpreted in accordance with the appended claims. Furthermore, those skilled in the art will appreciate that numerous modifications and variations are possible without departing from the scope of the present invention.

[0120] You can check whether the signatures on various documents are forged.

Claims

1. A first device that recognizes a user's biometric information and generates a user's signature, whose biometric information is recognized and recorded on a document, as first digital information; A second device generating second digital information for scanning the signature recorded on the document; A system for verifying forgery and alteration of a user's signature using blockchain, comprising a process of receiving signature information including personal information of a user whose biometric information is recognized from the first device, the first digital information, and information on the time at which the signature was made, encrypting the signature information using blockchain technology, receiving the second digital information from the second device, and determining whether the second digital information and the encrypted signature information match.

2. In paragraph 1, The above first device, A housing having a shape that can be held by the user's hand; A biometric information recognition sensor provided in the housing and recognizing the user's biometric information; and A system for verifying forgery and alteration of a user signature using blockchain, including a user recognition unit that recognizes the user by comparing the biometric information recognized by the biometric information recognition sensor with previously stored information.

3. In paragraph 1, The above biometric information recognition sensor A vein recognition sensor that scans the veins from the user's hand; and A blockchain-based user signature forgery verification system including a microphone sensor that receives a voice signal from the user.

4. In paragraph 2, The above first device, Provided on the bottom surface of the housing, and including a signature printing unit for printing the signature of a user whose biometric information has been recognized on a document, The signature printed by the above signature printing unit is, A user identification portion designated by a user whose biometric information is recognized; and A system for verifying forgery of a user's signature using a blockchain that includes a code mark in which the personal information of the user whose biometric information has been recognized and the signature time information are encrypted.

5. In paragraph 2, The above first device, Further comprising a pencil portion that can be placed in the above housing, The above pencil part A body provided with a nib at the tip; A camera provided on the above body, which photographs the area where the pen tip signs; A motion detection sensor that detects three-dimensional movement of the above body; and A user signature forgery verification system using blockchain that generates the first digital information through an image received from the above camera and a three-dimensional motion signal provided from the above motion detection sensor.

6. In paragraph 2, The above first device A blockchain-based user signature forgery verification system further comprising a moving roller provided on the lower surface of the housing and rotating along the ground at a preset speed.

7. In paragraph 1, The second device above An image sensor that scans the signature recorded on the above document to generate the second digital information; Input section for entering information stated in the above document; and A system for verifying forgery and alteration of a user signature using blockchain, the system including a communication unit capable of communicating with the above process and transmitting second digital information scanned by the image sensor and information written in the document to the above process.

8. In paragraph 1, The above process is A step of comparing the information entered in the input section, the personal information of the user whose biometric information has been recognized, and the time information when the signature was made; and A system for verifying forgery and alteration of a user signature using blockchain, comprising a step of comparing the first digital information and the second digital information when the information described in the above document, the personal information of the user whose biometric information is recognized, and the time information when the signature was made match.

9. A step of recognizing the user's biometric information through the first device and verifying the user; A step of generating a signature of a user whose biometric information recorded on a document is recognized through the first device as first digital information; A step of receiving signature information including personal information of a user whose biometric information is recognized, the first digital information, and time information at which the signature was made, and encrypting the signature information using blockchain technology built into the process; A step of generating second digital information by scanning the signature written on the document through a second device; and A method for verifying forgery of a user signature using blockchain, comprising the steps of receiving the second digital information and determining whether the second digital information and the encrypted signature information match through the process.

10. In paragraph 9, The above biosignals are Vein signals recognized from the hand of the user; and A method for verifying forgery of user signature using blockchain containing the voice signal of the brave.

11. In paragraph 9, Further comprising a step of printing the signature of the user whose biometric information is recognized through the first device on a document, The above user's signature is A user identification portion designated by a user whose biometric information is recognized; and A method for verifying forgery of a user's signature using a blockchain that includes a code mark in which the personal information of the user whose biometric information is recognized and the signature time information are encrypted.

12. In paragraph 9, The step of generating the signature of the user whose biometric information has been recognized as the first digital information is as follows: While the user signs using the pencil, the signature area is captured through a camera provided in the pencil to create an image, and the three-dimensional movement of the pencil is detected to create a three-dimensional movement signal. A method for verifying forgery of a user signature using a blockchain that generates the first digital information through the above image and the above three-dimensional motion signal.

13. In paragraph 9, The second digital information includes information written on a document scanned via the second device, The step of comparing the first digital information and the second digital information is: A step of comparing the information described in the above document with the personal information of the user whose biometric information has been recognized, and the time information when the signature was made; and A method for verifying forgery of a user signature using blockchain, comprising the step of comparing the first digital information with the second digital information if the information described in the document and the personal information of the user whose biometric information is recognized, and the time information when the signature was made match.

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