KR20210064653A - A device for mobile payment and method for the same - Google Patents

Abstract

In accordance with an embodiment, provided is a device operating by interlocking with an external device. The device comprises: a display for displaying a first image including information on a sound wave frequency determined by a preset method; a microphone for receiving a sound wave output from the external device in response to the first image; and a processor which determines whether the frequency of the received sound wave corresponds to the sound wave frequency, and updates user information stored in the device based on the information obtained from the received sound waves and generates a signature value when the frequency of the received sound waves corresponds to the sound wave frequency. The display displays a second image resulting from an update result and the signature value. Therefore, the device enables a safe payment even in an offline environment.

Description

DEVICE FOR MOBILE PAYMENT AND METHOD FOR THE SAME

The present invention relates to a method for mobile payment using images and sound wave communication, and a device for performing the same, and more particularly, device verification by displaying an image dynamically based on sound wave communication while interworking between a device and an external device It relates to a technology capable of improving security by enabling secure mobile payment even in an offline environment that cannot be connected to a back-end system.

In the transportation card market, mobile images (eg, mobile QR) are being actively used as a means to replace the conventional plastic card-based tickets. However, a limited form of ticket service is provided due to various restrictions depending on a complex and diverse payment environment. In addition, when used in an offline environment, there is a potential threat to illegal use.

The conventional mobile QR technology takes a real-time online authentication method or an offline authentication method. However, there are service limitations and potential threats as follows.

In the case of the mobile QR technology based on the conventional real-time online authentication method, the validity of the QR is verified through the network connection between the mobile QR and the sensor system. For example, when the user terminal presents a mobile QR, the bus/railway terminal reads the mobile QR and then transmits the read information to a separate authentication server through the online network, and the authentication server verifies the validity of the QR data and verifies the result is transmitted to the bus/railway terminal, and the bus/railway terminal supplies or supports the specified service/goods based on the verification result.

Therefore, an online network between them is essential, and when the terminal is not connected to the center system, there is a disadvantage that the service is impossible. In addition, there is a problem in that speed deviation occurs for each transaction depending on the network and the authentication server situation.

In the case of the mobile QR technology based on the conventional offline authentication method, the mobile QR is converted into a specified period (eg, 10 seconds), and the terminal verifies the validity of the QR data at the time of reading. For example, the user terminal regenerates the QR by including the current time information in the mobile QR at regular intervals, and when the user terminal presents the mobile QR, the bus/railway terminal reads the mobile QR and verifies the validity of the QR data to supply or support designated services/goods based on the verification results.

However, in the prior art described above, in order to counter illegal use such as double use of mobile QR by anonymous users through a screen sharing service (eg, screen mirroring) of a smartphone, the terminal actually centers the read mobile QR in real time. It must be transmitted to the server, and the center server must download the usage list for mobile QR to all terminals. This causes a lot of cost for system operation, and there are disadvantages in that illegal use cannot be filtered out depending on the network environment.

In addition, the above-described prior art has a disadvantage in that anonymous users cannot cope with illegal use of dual use of mobile QR through a screen sharing service (eg, screen mirroring) of a smart phone.

In a situation where most operators are introducing mobile QR to reduce costs and prevent ticket contamination, the demand for a method that can fundamentally block the illegal use of mobile QR is increasing, and to solve the above problems There is an urgent need for measures to

One embodiment of the present invention is to solve the problems of the prior art described above, by verifying each other through mutual interworking between the device 100 and the external device 200 using image and sound wave communication, the back-end (back-end) end) Safe payment can be made even in an offline environment that cannot be connected to the system, and it can effectively respond to fraud such as screen mirroring.

Objects of the present invention are not limited to the objects mentioned above, and other objects not mentioned will be clearly understood from the description below.

A device operating in conjunction with an external device according to the first aspect of the present disclosure includes a display for displaying a first image including information on a sound wave frequency determined by a preset method; a microphone for receiving a sound wave output from the external device in response to the first image; and determining whether the frequency of the received sound wave corresponds to the sound wave frequency, and when the frequency of the received sound wave corresponds to the sound wave frequency, user information stored in the device based on information obtained from the received sound wave and a processor that updates and generates a signature value, wherein the display may display a second image according to a result of the update.

In addition, the preset scheme includes a random scheme, and when the difference between the frequency of the received sound wave and the sound wave frequency is greater than a preset value, the processor may output a notification message indicating that a problem has occurred .

Also, the first image may include authentication information indicating that it was generated by the device.

In addition, the second image may include information indicating that the user information is updated according to the received sound wave.

In addition, the sound wave output from the external device includes information about an eigenvalue indicating the external device, and the processor uses information included in the received sound wave to receive the received sound wave from the external device. You can decide whether or not

Also, when it is determined that the received sound wave is not received from the external device, the processor may output a notification message indicating that a problem has occurred.

In addition, the user information may include value information about the balance held by the user in a preset manner.

In addition, the user information may include value information about the cost to be charged to the user.

Also, when the difference between the frequency of the received sound wave and the sound wave frequency is less than a preset value, the processor may update the user information stored in the device based on information obtained from the received sound wave.

In addition, the first image and the second image may include at least one of a QR code and a barcode.

According to a second aspect of the present disclosure, a method for a device to operate in conjunction with an external device includes: displaying a first image including information on a sound wave frequency determined by a preset method; receiving a sound wave output from the external device in response to the first image; determining whether the frequency of the received sound wave corresponds to the sound wave frequency; when the frequency of the received sound wave corresponds to the sound wave frequency, updating user information stored in the device based on information obtained from the received sound wave, and generating a signature value; and displaying a second image generated according to the update result.

In addition, the preset method includes a random method, and the method includes outputting a notification message indicating that a problem has occurred when a difference between the frequency of the received sound wave and the sound wave frequency is greater than a preset value. may include more.

Also, the first image may include authentication information indicating that it was generated by the device.

In addition, the second image may include information indicating that the user information is updated according to the received sound wave.

In addition, the sound wave output from the external device includes information about an eigenvalue indicating the external device, and the method uses information included in the received sound wave to receive the received sound wave from the external device. It may further include the step of determining whether or not.

In addition, the method may further include outputting a notification message indicating that a problem has occurred when it is determined that the received sound wave is not received from the external device.

In addition, the user information may include value information about the balance held by the user in a preset manner.

In addition, the user information may include value information about the cost to be charged to the user.

A third aspect of the present disclosure may provide a computer program stored in a recording medium to implement the method according to the second aspect. Alternatively, the fourth aspect of the present disclosure may provide a computer-readable recording medium in which a program for executing the method according to the second aspect on a computer is recorded.

An external device operating in conjunction with the device according to the fifth aspect of the present disclosure includes: a camera for receiving a first image including information on a sound wave frequency determined by a preset method; a processor that parses the first image to determine the sound wave frequency; and a speaker that includes information on the eigenvalue of the external device and outputs a sound wave corresponding to the sound wave frequency, wherein the camera is received from the device in response to the output of the sound wave and stored in the device It may indicate that the information has been updated, and may receive a second image including information about the signature value.

According to an embodiment of the present invention, by verifying each other through mutual interworking between a device and an external device using image and sound wave communication, a secure payment can be made even in an offline environment that cannot be connected to a back-end system. can

According to an embodiment of the present invention, it is possible to effectively respond to fraud such as screen mirroring in an offline environment, and to utilize existing infrastructure as it is.

According to an embodiment of the present invention, by performing verification by dynamically changing the QR code through mutual interworking between the device and an external device based on sound wave communication, a high level of security can be secured.

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

1 is a diagram schematically illustrating a configuration of a mobile payment system based on image and sound wave communication according to an embodiment.
FIG. 2 is a block diagram illustrating an example of the configuration of the device shown in FIG. 1 .
FIG. 3 is a diagram for explaining an example of a first image and a second image displayed by the device shown in FIG. 1 .
FIG. 4 is a block diagram illustrating an example of the configuration of the external device shown in FIG. 1 .
5 is a flowchart illustrating a process in which a device operates in conjunction with an external device according to an exemplary embodiment.
FIG. 6 is a flowchart illustrating an example of a method in which a device and an external device operate in cooperation with each other for mobile payment, according to an embodiment.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in several different forms, and thus is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is "connected" with another part, this includes not only the case of being "directly connected" but also the case of being "indirectly connected" with another member interposed therebetween. . In addition, when a part "includes" a certain component, this means that other components may be further provided without excluding other components unless otherwise stated.

Hereinafter, an embodiment will be described in detail with reference to the accompanying drawings.

1 is a diagram schematically illustrating a configuration of a mobile payment system based on image and sound wave communication according to an embodiment.

Referring to FIG. 1 , a mobile payment system based on image and sound wave communication according to an embodiment may include a device 100 and an external device 200 .

The device 100 according to an embodiment is a mobile phone, a smart phone, a personal digital assistant (PDA), a portable multimedia player (PMP), a tablet PC, etc. all kinds of handheld-based devices equipped with a display panel and a microphone. It may be implemented as a device, and may include any type of wired/wireless communication device that can be connected to an external server through a wired or wireless communication network.

The device 100 according to an embodiment may install an application for providing a mobile payment service based on sound wave communication and store it in a memory. For example, the device 100 may connect to an app store server (not shown) to which various applications are uploaded, and then download and install a mobile payment service application based on image and sound wave communication, and the service of the application A corresponding application may be executed through the support of an external server (not shown) that supports the provision.

The device 100 according to an embodiment may store and manage information on pre-purchased goods/services (eg, a monthly bus pass) through a mobile payment service application, and in the process of using the purchased goods/services ( For example: when boarding a bus) Image (eg, QR code, barcode) and sound wave communication are used to operate in conjunction with the external device 200 so that mutual device verification and mobile payment can be made safely. This will be described later in more detail with reference to FIG. 2 below.

The external device 200 according to an embodiment includes an image reader (eg, a QR code reader, a barcode reader, etc.) that can read an image (eg, a QR code, a barcode) and a sound wave output that can output a sound wave (eg: speaker), and may include all types of wired/wireless communication devices that can be connected to an external server through a wired or wireless communication network.

In an embodiment, the external device 200 may be implemented as a transportation terminal (eg, a bus terminal, a subway terminal) installed in a transportation means (eg, a bus, a subway) to authenticate a user who wants to use the corresponding transportation means, In another embodiment, it may be implemented as a POS terminal installed in a business place to authenticate a user who wants to purchase goods or services sold in the business place, or in another embodiment, it may be implemented as a portable mobile terminal. The external device 200 is not limited to the above-described embodiment, and may be implemented through various embodiments applicable to other various payment environments.

The external device 200 according to an embodiment may verify the device 100 in order to provide a product/service, read an image (eg, a QR code, a barcode) displayed by the device 100 and include it in the image By outputting sound waves based on the obtained information and operating in conjunction with the device 100, mutual device verification and mobile payment can be made safely. This will be described later in more detail with reference to FIG. 2 below.

The device 100 and the external device 200 according to an embodiment may operate in cooperation with each other without going through a network. Here, the network refers to various wired and wireless communication networks, such as a local area network, a metropolitan area network, and a wide area network. For example, the device 100 may operate in an offline environment by directly interworking with the external device 200 based on image (eg, QR code, barcode, etc.) and sound wave communication, and without communicating with a separate external server. It can verify each other and ensure secure mobile payment.

The type of sound wave output by the external device 200 according to an embodiment is not limited and may change over time. For example, the sound wave output from the external device 200 may be a sound wave whose frequency changes at a preset period, may be an ultrasonic wave inaudible to the human ear, or may be an audible frequency sound to the human ear. As an example, the external device 200 may output one verse of a song. In this case, the external device 200 may perform sound wave communication with the device 100 in such a way that a specific phrase of a song familiar to people is repeatedly played. In this case, the starting point and the ending point of the specific repeated phrase may be randomly determined. Thus, certain repeated phrases may contain unique information. In addition, when the audible frequency is used in this way, the interest of the user can be stimulated. In addition, a plurality of frequencies can be used simultaneously. For example, the external device 200 may communicate with the device 100 by simultaneously outputting sound waves of an audible frequency and an inaudible frequency. In this case, since the user can hear sound waves of an audible frequency (eg, a specific section of a song), it can be recognized that communication is being performed using sound waves.

The mobile payment system based on image and sound wave communication according to an embodiment may further include one or more external servers, for example, a service server that provides a mobile payment service based on image and sound wave communication, a product / May include, but is not limited to, a service provider server (eg, a bus operator server), a payment server (eg, a card company server) for payment of the product/service, etc., and may further include various servers. have.

FIG. 2 is a block diagram illustrating an example of the configuration of the device 100 shown in FIG. 1 .

Referring to FIG. 2 , the device 100 according to an embodiment may include a display 110 , a microphone 120 , and a processor 130 .

The display 110 according to an embodiment may display an output obtained from the device 100, for example, an image (eg, a QR code, barcodes, etc.).

The display 110 according to an embodiment includes a Liquid Crystal Display (LCD), a Thin Film Transistor-Liquid Crystal Display (TFT-LCD), an Organic Light-Emitting Diode (OLED), an Active Matrix Organic Light-Emitting Diode (AMOLED), It may be implemented as a flexible display, a three-dimensional display, an electrophoretic display, or the like.

The microphone 120 according to an embodiment may convert an externally generated sound into an electrical signal, and, for example, may receive a sound wave output from the outside under the control of the processor 130 .

The microphone 120 according to an embodiment may be implemented as a condenser microphone, a dynamic microphone, a ribbon microphone, or the like.

The processor 130 according to an embodiment may generate the first image 310 used for interworking with the external device 200 and visualize it on the display 110 . This will be described in more detail with further reference to FIG. 3 .

FIG. 3 is a diagram for explaining an example of the first image 310 and the second image 320 displayed by the device 100 shown in FIG. 1 .

Referring to FIG. 3A , the processor 130 according to an embodiment may generate a first image 310 using at least sound wave frequency information. In an embodiment, the first image 310 may include at least one of a QR (Quick Response) code that may be implemented as a two-dimensional image and a barcode that may be implemented as a one-dimensional image. In an embodiment, the information on the sound wave frequency may include a specified frequency value or range, or a frequency number corresponding to a preset frequency value or range.

The processor 130 according to an embodiment may determine the aforementioned sound wave frequency in a preset method, and include information on the determined sound wave frequency in the first image 310 . For example, the processor 130 randomly determines one of the pre-stored N (N is a natural number) frequency numbers according to the sound wave frequency setting algorithm included in the mobile payment service application, or the pre-stored M ( M is a natural number), one of frequency values may be sequentially determined, and the determined sound wave frequency information may be applied to a pre-stored QR code generation algorithm to generate a first image 310 including sound wave frequency information.

The preset method according to an embodiment may include a random method, and for example, information on sound wave frequency may be dynamically determined. For example, the processor 310 generates a random number that is a natural number greater than or equal to 1 and less than or equal to N by applying the sound wave frequency used immediately before the current time and the current time to the pre-stored random number generating function, and randomly selects one of the indexed N frequency numbers. can decide

The first image 310 according to an embodiment may include authentication information indicating that the device 100 has generated the first image 310 . In an embodiment, the authentication information includes information about a product purchased by the user in advance (eg, mobile ticket information), a device identifier for identifying the device 100, a user identifier for identifying the user, and a key for encryption/decryption It may include one or more of information. The authentication information according to an embodiment may improve security by supporting the external device 200 not to operate on any image in the process of reading the first image 310 from the external device 200 .

The processor 130 according to an embodiment receives authentication information from an external server in a pre-purchase process such as purchasing a specific product (eg, a bus monthly pass) in advance or purchasing a predetermined electronic money in conjunction with an external server. It can be stored and managed, and authentication information can be used for device verification in the process of generating the first image 310 .

The processor 130 according to an embodiment may generate the first image 310 including the encrypted data by encrypting at least one of the determined sound wave frequency information and the stored authentication information using a preset encryption method. For example, the processor 130 may perform encryption based on an asymmetric key method such as an RSA algorithm or a symmetric key method such as an AES/3-DES algorithm, and for encryption, information stored in a mobile payment service application or above Key information included in one authentication information may be used.

The first image 310 according to an embodiment is not limited to the above-described examples, and may further include various other information.

The microphone 120 according to an embodiment may receive a sound wave output from the external device 200 in response to the first image 310 . For example, when the first image 310 is displayed on the display 110 , the processor 130 drives the microphone 120 for a specific time period from the display point of the first image 310 for a preset specific time period. to receive an external sound wave, and the microphone 120 can be controlled to receive the sound wave using information (eg, a value, range, or number) of the sound wave frequency included in the first image 310 . For example, the device 100 and the external device 200 located within a preset distance may read the displayed first image 310 to obtain sound wave frequency information therefrom, and A sound wave may be provided to the microphone 120 by outputting a sound wave accordingly. Details regarding the operation of the external device 200 will be described later with reference to FIG. 5 .

The processor 130 according to an embodiment may analyze a sound wave received through the microphone 120 to determine whether the received sound wave corresponds to information on a sound wave frequency included in the first image 310 . For example, the processor 130 may obtain information (eg, a value, range, or number) of a sound wave frequency obtained by analyzing a received sound wave according to a pre-stored sound wave analysis algorithm, and the obtained number is the first image It may be determined whether the information (eg, value, range, or number) of the sound wave frequency included in 310 corresponds. The processor 130 according to an embodiment of the present invention provides information on the frequency of the received sound wave (eg, a value, range, or number) and information on the frequency of the sound wave included in the first image 310 (eg, a value, range, or number). When the difference is smaller than the preset value, it may be determined that the received sound wave corresponds to the sound wave frequency information included in the first image 310 . According to an embodiment, the preset value may mean a level value indicating an error range. For example, the preset value may be 1 to 2 Hz, which is an error range level.

In an embodiment, the sound wave output from the external device 200 may include information on a unique value representing the external device 200 . In an embodiment, the eigenvalue may include at least one of information on a sound wave frequency obtained through analysis and data specific to an external device. In an embodiment, the external device-specific data may include one or more of key information used to generate authentication information to be included in the generation of the second image 320 and an external device identifier for identifying the external device 200 . . In one embodiment, this unique value may be received from an external server in a pre-registration process, such as when the external device 200 interworks with an external server to register a device, may be stored and managed, and may be used for external device verification, In the key information in the unique value, the external device 200 may randomly determine one of the indexed N numbers by generating a random number that is a natural number.

The processor 130 according to an embodiment may determine whether the received sound wave is received from the external device 200 by using information included in the received sound wave. For example, the processor 130 may obtain the eigenvalue of the external device 200 from the sound wave by analyzing the received sound wave, and information on the sound wave frequency included in the acquired eigenvalue is the first sound wave displayed by itself. Verification of the external device 200 may be performed by checking whether information on sound wave frequencies included in the image 310 corresponds (eg, whether a mutual difference is smaller than a preset value), and accordingly, A more secure transaction can be supported by enabling device verification between the two.

When it is determined that the received sound wave is not received from the external device 200, the processor 130 according to an embodiment may output a notification message indicating that a problem has occurred, for example, in the subsequent mobile payment step After stopping, a notification message including a cause of the problem (eg, an unregistered device), a countermeasure (eg, retry in another normally registered device) and an error code may be visualized on the display 110 .

When the frequency of the sound wave received through the microphone 120 corresponds to the sound wave frequency included in the first image 310 , the processor 130 according to an exemplary embodiment receives the sound wave received from the user information stored in the device 100 . It can be updated based on the information obtained from Here, the user information may include value information possessed by the user, and in an embodiment, the device 100 through the mobile payment service application in the process of the user purchasing and retaining specific value information in a preset manner. can be stored in

In an embodiment, the above-described user information may include value information on the balance held by the user in a preset manner. For example, user information may include one-time or fixed-term products/services purchased in advance through a product purchase method (e.g., a monthly bus pass, maximum number of use 80 times) and the remaining number of sessions (e.g., 27 uses, 53 time remaining) and remaining period (eg, 13 days of use, 17 days of remaining). As another example, the user information may include a remaining amount (eg, 10,000 won remaining) associated with electronic money (eg, T-money) purchased and held in advance by a prepaid charging method. As another example, the user information may include an amount associated with Pay Money held in advance in association with a payment method (eg, account, credit card) in a pre-post payment linkage method.

In an embodiment, the above-described user information may include value information about the cost to be charged to the user, for example, deduction information (eg, deducting one available number of times) or usage fee (eg, 1,000 won). may include. In an embodiment, the user information is not limited to the above-described examples, and may further include various other information including value information.

When the difference between the frequency of the received sound wave and the frequency of the sound wave included in the first image 310 is smaller than a preset value, the processor 130 receives user information stored in the device 100 from the received sound wave. It can be updated based on the obtained information. For example, the processor 130 may analyze whether the difference between the frequency of the received sound wave and the sound wave frequency included in the first image 310 is less than or equal to a preset value through a pre-stored sound wave analysis algorithm, When the value is analyzed below the value, it can be determined that the frequency of the received sound wave corresponds to the sound wave frequency included in the first image 310, and the user purchases the product in advance as a product purchase method and has a fixed-term product (eg, one month of the bus). The remaining amount of user information stored in the device 100 by reflecting the deduction information (eg, deducting 1 available number of times) to the remaining rounds (eg, 27 uses, 53 remaining) associated with commuter pass, maximum available number of times of 80) It is possible to renew the rounds (eg, used 28 times, remaining 52 times).

When the difference between the frequency of the received sound wave and the frequency of the sound wave included in the first image 310 is greater than a preset value, the processor 130 according to an embodiment may output a notification message indicating that a problem has occurred, , for example, a notification message including a cause of a problem (eg, a sound wave reception error), a countermeasure (eg, retry), and an error code may be visualized on the display 110 .

Referring to FIG. 3B , the processor 130 according to an embodiment may generate a second image 320 according to the update result of user information and visualize it on the display 110 . In an embodiment, the second image 320 may include at least one of a QR code and a barcode, and information indicating that the above-described user information is updated according to the received sound wave (eg, balance deduction information according to payment success) may include, but is not limited thereto, and may further include various other information.

The processor 130 according to an embodiment may generate the second image 320 by using an eigenvalue obtained by analyzing the received sound wave. For example, the second image 320 may be generated by encrypting the update result of the user information generated as authentication information using key information included in the unique value extracted from the received sound wave, for example, extraction The second image 320 including the additional authentication information may be generated by using the key information included in the unique value.

When the received sound wave includes an image type, the processor 130 according to an embodiment may generate a second image 320 including a QR code or a barcode according to the image type. For example, the external device 200 may output a sound wave including information about an image type (eg, QR code or barcode) determined in a random manner, and the image type is the image of the first image 310 . It may be the same as or different from the type.

When the display of the second image 320 is finished, the processor 130 according to an embodiment may display the update result of the user information. For example, the display of the second image 320 may be performed based on the user input. Upon termination, information on the relevant product (e.g., monthly bus pass, maximum number of use 80), remaining runs before renewal (e.g., 27 uses, 53 remaining), and deduction information reflected this time (e.g., 1 available number of times) times), remaining sessions after renewal (e.g., 28 uses, 52 remaining), remaining period (e.g., 7 days remaining out of 30 days) and external device information (e.g. external device identifier, installation location, type, etc.) ) may be output to the display 110 including usage details.

The processor 130 according to an embodiment may be implemented as a central processor unit (CPU) that controls overall operation of the device 100 , and is electrically connected to the display 110 and the microphone 120 to flow data therebetween. can be controlled.

In addition, it can be understood by those of ordinary skill in the art that other general-purpose components other than those shown in FIG. 2 may be further included in the device 100 . For example, the device 100 may further include a memory for storing data used throughout the operation of the device 100 and an input/output interface for receiving or outputting a user input.

FIG. 4 is a block diagram illustrating an example of the configuration of the external device 200 shown in FIG. 1 .

4 may be understood with reference to all embodiments in which the device 100 and the external device 200 illustrated in FIGS. 1 to 3 operate.

Referring to FIG. 4 , the external device 200 according to an embodiment may include a camera 210 , a processor 220 , and a speaker 230 .

The camera 210 according to an embodiment may receive an image displayed by the device 100 through imaging of the device 100 , for example, a preset period or a user according to the control of the processor 220 . It may be implemented as a camera module capable of capturing an image located in the imaging area based on an input.

The processor 220 according to an embodiment may parse the first image 310 to obtain sound wave frequency information. For example, when the first image 310 displayed by the device 100 is received through the camera 210 , the processor 220 parses the first image 310 according to a pre-stored image reading algorithm. to determine the value, range, or number of the sound wave frequency contained in the QR code or barcode.

The processor 220 according to an embodiment may output a sound wave to the speaker 230 according to the determined sound wave frequency information, for example, a pre-stored frequency value corresponding to the determined sound wave frequency number of the speaker 230 . can be obtained to output a sound wave with a corresponding frequency value.

The processor 220 according to an embodiment may parse the first image 310 to further obtain authentication information indicating that it is generated in the device 100, for example, after obtaining mobile ticket information through parsing Verification of the device 100 can be performed by comparing and analyzing whether it corresponds to the related product information stored in advance (eg, whether the information matches). If the verification fails, the subsequent mobile payment process is stopped and a problem occurs. A notification message indicating that it has been done can be output.

The processor 220 according to an embodiment may decode at least some of the information obtained by parsing the first image 310 in a preset method to obtain at least one of a sound wave frequency and authentication information. For example, the processor 220 may perform decryption based on an asymmetric key method such as an RSA algorithm or a symmetric key method such as an AES/3-DES algorithm. In an embodiment, the processor 220 obtains key information and encrypted sound wave frequency information included in the authentication information through parsing of the first image 310, and uses the obtained key information to obtain an encrypted sound wave frequency Verification of the device 100 may be performed by decoding the information of .

The processor 220 according to an embodiment may include information on the eigenvalue of the external device 200 through the speaker 230 and output a sound wave corresponding to the determined sound wave frequency. For example, the processor 220 is a key used to generate authentication information to be included in the generation of the sound wave frequency information (eg, frequency number) obtained through parsing based on the pre-stored sound wave algorithm and the second image 320 . It is possible to generate sound wave data sequentially including information (eg, key number) and output it as a sound wave. Accordingly, as described above, the device 100 receives the corresponding sound wave, verifies the external device 200 based on the information on the sound wave frequency included in the sound wave, and authentication information generated using the key information included in the sound wave. The second image 320 including the may be displayed.

The processor 220 according to an embodiment may parse the second image 320 to obtain an update result of user information. For example, the camera 210 may receive the second image 320 received from the device 100 in response to the output of the sound wave through the speaker 230 , and the processor 220 may display the second image 320 . ) to obtain information indicating that user information has been updated (eg, balance deduction information according to successful payment) and visualize the result.

In one embodiment, the processor 220 may decrypt the update result of the parsed and encrypted user information from the second image 320 using key information included in the sound wave, and in another embodiment, included in the sound wave The verification of the device 100 may be completed by using the obtained key information to check the additional authentication information parsed from the second image 320 .

The processor 220 according to an embodiment may update user information pre-stored in the external device 200 based on the obtained update result of the user information. For example, when device verification is completed, the processor 220 may update value information (eg, balance, etc.) stored in association with the corresponding product by reflecting the update result of user information.

The processor 220 according to an embodiment may be implemented as a CPU that controls the overall operation of the external device 200 , and may be electrically connected to the camera 210 and the speaker 230 to control the data flow between them. have.

The speaker 230 according to an embodiment may output sound waves under the control of the processor 220 , and may be implemented as, for example, a sound module.

In addition, those of ordinary skill in the art may understand that other general-purpose components other than those shown in FIG. 4 may be further included in the external device 200 . For example, the external device 200 may further include a memory for storing data used throughout the operation of the external device 200 and an input/output interface for receiving or outputting a user input.

5 is a flowchart illustrating a process in which the device 100 operates in conjunction with the external device 200 according to an exemplary embodiment.

FIG. 5 may be understood with reference to all embodiments in which the device 100 and the external device 200 illustrated in FIGS. 1 to 4 operate.

In operation S510 , the device 100 according to an embodiment may display a first image 310 including information on a sound wave frequency determined by a preset method. For example, the device 100 may dynamically determine a sound wave frequency in a random manner, and may generate and visualize the first image 310 including the determined sound wave frequency information as a QR code.

The external device 200 according to an embodiment may acquire information on a sound wave frequency included in the first image 310 through parsing by capturing the first image 310 displayed by the device 100, and obtain It is possible to output a sound wave corresponding to the sound wave frequency. For example, a sound wave frequency may be obtained by capturing and reading the first image 310 through QR code scanning, and a sound wave may be output with the obtained sound wave frequency.

In step S520 , the device 100 according to an embodiment may receive a sound wave output from the external device 200 in response to the first image 310 , and the frequency of the sound wave received in step S530 is the first image ( 310), it may be determined whether it corresponds to the sound wave frequency included in the . For example, the device 100 may receive a sound wave output from the external device 200 with a sound wave frequency included in the first image 310, and a frequency obtained by analyzing the received sound wave and the first image ( If the difference between the sound wave frequencies included in 310) is less than or equal to a preset value, it may be determined that they correspond to each other.

In step S540, when the frequency of the received sound wave corresponds to the sound wave frequency included in the first image 310, the device 100 receives user information stored in the device 100 from the received sound wave in step S540. It can be updated based on the information. For example, information on the value of the balance held by the user in a preset manner (eg, the number of times allowed in mobile tickets) included in the stored user information includes value information about the cost to be charged to the user (eg, allow the use) 1 time) to update user information.

In addition, in step S540 , when the frequency of the received sound wave corresponds to the sound wave frequency included in the first image 310 , the device 100 determines a signature value based on information obtained from the received sound wave. can create The signature value may include a signature value for the user's card private key. Also, as will be described later in step S550 , the generated signature value, card public key, etc. may be displayed as the second image 320 . In this case, the external device 200 may perform additional verification (eg, two-step verification) using the signature value card public key obtained from the second image 320 (eg, QR code).

In operation S550 , the device 100 according to an embodiment may display the second image 320 according to the update result of the user information. For example, the device 100 may generate and display the second image 320 including information indicating that user information has been updated (eg, payment completed) as a QR code. In addition, information indicating the signature value generated in step S540 and information on the card public key may be included in the silver second image 320 . In this case, the external device 200 may perform additional verification (eg, two-step verification) using the signature value card public key obtained from the second image 320 (eg, QR code).

The external device 200 according to an embodiment may acquire information (eg, payment completion) indicating that user information included in the second image 320 has been updated by capturing the second image 320 and parsing it. , for example, by capturing and reading the second image 320 through QR code scanning, it is possible to obtain update details including whether the value information is updated and the remaining value.

According to an embodiment of the present invention, by verifying each other through mutual interworking between the device 100 and the external device 200 using image and sound wave communication, even in an offline environment that cannot be connected to a back-end system It can solve the transaction delay problem while ensuring secure payment.

6 is a flowchart for explaining an example of a method in which the device 100 and the external device 200 operate in cooperation with each other for mobile payment, according to an embodiment.

6 may be understood with reference to all embodiments in which the device 100 and the external device 200 illustrated in FIGS. 1 to 5 operate.

In step S601 , the device 100 according to an embodiment may purchase a specific product (eg, a monthly bus pass, up to 80 times) by interworking with the server 610 through a mobile payment service application based on a user request. In an embodiment, the server 610 may include one or more service servers for providing a corresponding product or a service related thereto, and one or more payment servers for payment, and for convenience, one or more network connection required in the product purchase process. Servers can be generically named.

In step S602 , the device 100 according to an embodiment may receive product purchase information from the server 610 when the purchase of the corresponding product is completed through interworking with the server 610 . For example, the device 100 may receive and store authentication information including mobile ticket information for a one-month bus pass through a mobile payment service application.

In step S603 , the device 100 according to an embodiment may start a mobile payment process based on a user input, and an image based on pre-stored information (eg, mobile ticket information) about a product purchased in advance through the previous steps You can prepare the output of (eg QR code).

In step S604 , the device 100 according to an embodiment may randomly determine sound wave frequency information (eg, a value, range, or number), and in step S605 , the sound wave frequency information and its authentication information (eg, mobile) The first image 310 including ticket information and device identifier) as a QR code may be generated and displayed.

In step S606, the external device 200 according to an embodiment may acquire the first image 310 by scanning the device 100 located in the imaging area, and in step S607, the QR code of the first image 310 By parsing, it is possible to obtain sound wave frequency information and authentication information.

In step S608 , the external device 200 according to an embodiment verifies the device 100 using the authentication information (eg, mobile ticket information, device identifier, etc.) of the device 100 extracted from the first image 310 . This may be done, for example, only when the extracted authentication information matches the previously stored authentication information, it is determined that the device 100 is verified and the subsequent steps may be performed.

In step S609 , the external device 200 according to an embodiment may output a sound wave corresponding to the determined sound wave frequency information and including information about its own value (eg, key information, external device ID, etc.). .

The authentication value in the eigenvalue in step S609 may be generated based on an asymmetric key method such as the RSA algorithm or a symmetric key method such as the AES/3-DES algorithm.

The device 100 according to an embodiment may start receiving the sound wave after the display of the first image 310 , and may receive the sound wave output from the external device 200 through the microphone 120 in step S610 . .

In step S611 , the device 100 according to an exemplary embodiment may receive and analyze the received sound wave as a sound wave frequency randomly determined in step S604 , and obtain sound wave frequency information and eigenvalues from the sound wave.

In step S612 , the device 100 according to an embodiment may verify the external device 200 using the obtained sound wave frequency, for example, in step S604 with the sound wave frequency obtained from the received sound wave If the difference between the randomly determined sound wave frequencies is smaller than a preset value, it may be determined that they correspond to each other.

Alternatively, the device 100 according to an embodiment verifies the authentication value generated in step S604 obtained from the received sound wave based on an asymmetric key method such as the RSA algorithm or a symmetric key method such as the AES/3-DES algorithm to mutually It can be decided that the corresponding

In step S613 , the device 100 according to an embodiment may update the stored user information when the verification of the external device 200 is normally completed through the previous steps, for example, as value information included in the user information. User information is reflected based on the remaining number of trips (e.g., 27 uses, 53 remaining) and deduction information (e.g., deducting 1 available number of times) of the product (e.g., monthly bus pass, maximum number of use 80 times) to update the remaining rounds (eg, use 28 times, remaining 52 times), and visualize a notification message indicating that the payment has been completed normally.

In step S614, the device 100 according to an embodiment generates a second image 320 including additional authentication information by using a unique value (eg, key information) obtained from the received sound wave and an update result of user information. can be displayed.

Authentication information can be generated based on an asymmetric key method such as the RSA algorithm or a symmetric key method such as the AES/3-DES algorithm for the obtained unique value (eg, key information).

The external device 200 according to an embodiment may continue imaging for image acquisition after the sound wave is output, and in step S615 the device 100 located in the imaging area displays the QR code of the second image 320 . It can be acquired as an image by scanning, and information indicating that user information has been updated by parsing the QR code of the second image 320 in step S616 (eg, whether payment is successful, balance deduction information according to payment, balance information, etc.) can be obtained

In step S617, the external device 200 according to an embodiment further verifies the validity of the information obtained from the second image 320 using the key information included in the sound wave output in step S609 for the device 100 can be performed.

The external device 200 according to an embodiment may support the provision of the goods/services by providing the corresponding goods/services or outputting a verification result when all of the above-described steps are successfully performed.

According to an embodiment of the present invention, the device 100 accesses the backend system only when purchasing a product for the first time and downloads ticket information through payment, so that thereafter, product transaction can be performed conveniently and safely even in an offline environment. can do.

According to an embodiment of the present invention, by dynamically determining a sound wave frequency to be used between the device 100 and the external device 200, a sound wave attack by an external hacker is difficult, and the length of data to be transmitted as a sound wave is determined. By reducing it, the overall transaction time can be shortened.

According to an embodiment of the present invention, it is possible to increase security by adding authentication information to the QR code.

The order and combination of the steps shown in FIG. 6 is an embodiment, and the order, combination, branch, function and the performing subject are added, omitted or modified in a range that does not depart from the essential characteristics of each component described in the specification. It can be seen that various implementations can be made. In addition, in the above description, as an example, an embodiment using a purchased product has been mainly described, but it is not limited thereto, it may be used for electronic money of a charging method, and can be applied to various examples in various forms that can be provided on mobile. have.

Meanwhile, the above-described method can be written as a program that can be executed on a computer, and can be implemented in a general-purpose digital computer that operates the program using a computer-readable recording medium. In addition, the structure of the data used in the above-described method may be recorded in a computer-readable recording medium through various means. The computer-readable recording medium includes a storage medium such as a magnetic storage medium (eg, ROM, RAM, USB, floppy disk, hard disk, etc.) and an optically readable medium (eg, CD-ROM, DVD, etc.) do.

The above description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

100: device
110: display 120: microphone
130: processor
200: external device
210: camera 220: processor
230: speaker
310: first image 320: second image

Claims (20)

In a device that operates in conjunction with an external device,
a display for displaying a first image including information on a sound wave frequency determined by a preset method;
a microphone for receiving a sound wave output from the external device in response to the first image; and
Determining whether the frequency of the received sound wave corresponds to the sound wave frequency,
When the frequency of the received sound wave corresponds to the sound wave frequency, based on the information obtained from the received sound wave, a processor for updating user information stored in the device and generating a signature value; includes;
and the display displays a second image generated according to the update result and the signature value.
The method of claim 1,
The preset method includes a random method,
the processor
When the difference between the frequency of the received sound wave and the sound wave frequency is greater than a preset value, the device outputs a notification message indicating that a problem has occurred.
The method of claim 1,
The device of claim 1, wherein the first image includes authentication information indicating that it was generated in the device.
The method of claim 1,
The second image includes information indicating that the user information is updated according to the received sound wave, the device.
The method of claim 1,
The sound wave output from the external device includes information about an eigenvalue representing the external device,
the processor
A device for determining whether the received sound wave is received from the external device by using the information included in the received sound wave.
6. The method of claim 5,
the processor
When it is determined that the received sound wave is not received from the external device, the device outputs a notification message indicating that a problem has occurred.
The method of claim 1,
The user information includes value information on the balance held by the user in a preset manner, the device.
The method of claim 1,
The user information includes value information about the cost due to the user, the device.
The method of claim 1,
the processor
When the difference between the frequency of the received sound wave and the sound wave frequency is less than a preset value, the device for updating the user information stored in the device based on information obtained from the received sound wave
The method of claim 1,
wherein the first image and the second image include at least one of a QR code and a barcode.
In a method for a device to operate in conjunction with an external device,
displaying a first image including information on a sound wave frequency determined by a preset method;
receiving a sound wave output from the external device in response to the first image;
determining whether the frequency of the received sound wave corresponds to the sound wave frequency;
when the frequency of the received sound wave corresponds to the sound wave frequency, updating user information stored in the device based on information obtained from the received sound wave, and generating a signature value; and
displaying a second image generated according to the update result and the signature value.
12. The method of claim 11,
The preset method includes a random method,
When the difference between the frequency of the received sound wave and the sound wave frequency is greater than a preset value, the method further comprising the step of outputting a notification message indicating that a problem has occurred.
12. The method of claim 11,
wherein the first image includes authentication information indicating that it was generated in the device.
12. The method of claim 11,
The second image includes information indicating that the user information is updated according to the received sound wave.
12. The method of claim 11,
The sound wave output from the external device includes information about an eigenvalue representing the external device,
Using the information included in the received sound wave, the method further comprising the step of determining whether the received sound wave is received from the external device.
16. The method of claim 15,
When it is determined that the received sound wave is not received from the external device, the method further comprising the step of outputting a notification message indicating that a problem has occurred.
12. The method of claim 11,
The method of claim 1, wherein the user information includes value information about the balance held by the user in a preset manner.
12. The method of claim 11,
The method of claim 1, wherein the user information includes value information about costs due to the user.
A computer program stored in a recording medium to implement the method of claim 11.
In an external device that operates in conjunction with the device,
a camera for receiving a first image including information on a sound wave frequency determined by a preset method;
a processor that parses the first image to determine the sound wave frequency; and
A speaker including information on the eigenvalue of the external device and outputting a sound wave corresponding to the sound wave frequency;
The camera receives a second image received from the device in response to the output of the sound wave, indicating that information stored in the device is updated, and receiving a second image including information about a signature value.

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