JP6025117B2 - Electronic coupon usage method and electronic coupon usage system - Google Patents

Description

  The present invention relates to a method and system for using an electronic coupon distributed via a communication network.

  Electronic coupons have been issued in order to discount meal prices, product prices, etc., and to provide specific menus and services via the Internet. This electronic coupon is received by a client-side terminal such as a smartphone or iPhone (registered trademark), and is a system for receiving a predetermined service by downloading the received electronic coupon and displaying it on the client-side terminal (Patent Literature). 1 and 2).

  The electronic coupon system described in Patent Document 1 is the latest when a client-side terminal such as a personal computer requests distribution of an electronic coupon from a server via the Internet, and the expiration date of the distributed electronic coupon has expired. This is a system for requesting delivery of an electronic coupon. As a result, the latest electronic coupon can be used in the store.

  The electronic coupon system described in Patent Document 2 is a system that generates a one-time password (OTP) when issuing an electronic coupon to a client-side terminal, and displays the electronic coupon and OTP as a barcode on the client-side terminal. It is. Security is provided by using OTP.

Japanese Patent Laid-Open No. 2003-6499 JP 2009-123013 A

However, the system described in Patent Document 1 has a problem that the reliability of the security of the electronic coupon is low and the electronic coupon is likely to be stolen.
In the system described in Patent Document 2, the security of the electronic coupon is given to some extent by using the OTP, but the security of the relationship between the electronic coupon and the store from which the electronic coupon is issued is not sufficient. . Further, there is a problem that the authentication of the store is insufficient and the reliability such as the electronic coupon is stolen is lacking.

  The present invention has been made in consideration of such problems, and improves the security of electronic coupons and further improves the security of stores by enabling store authentication. It aims at providing the utilization method and the utilization system of an electronic coupon.

  In the method of using the electronic coupon of the present invention, the client-side mobile terminal acquires the electronic coupon via the network, and the store-side mobile terminal generates a one-time password (OTP) based on the store identification information. A step of displaying an encryption code obtained by encrypting the OTP, a step of reading the encryption code displayed on the store-side mobile terminal by the client-side mobile terminal and transmitting it to the server on the headquarters side; The code is decoded, the decoded store identification information is compared with the store identification information stored in the server, an OTP is generated based on the store identification information, and the generated OTP and the client-side portable terminal are transmitted. The store authenticates the store by comparing the OTP from the store-side mobile terminal and the headquarters server authenticates the store And updating the stored coupon information of the electronic coupon based on the coupon information of the electronic coupon from the client-side portable terminal and transmitting the authentication result to the client-side portable terminal and the store-side portable terminal. It is characterized by that.

  In the above method, the headquarter-side server further comprises a step of authenticating the electronic coupon by comparing the coupon identification information of the electronic coupon from the client-side mobile terminal with the coupon identification information of the stored electronic coupon, When the server on the headquarters side authenticates the store and the electronic coupon, the coupon information of the stored electronic coupon is updated based on the coupon information of the electronic coupon from the client side portable terminal, and the authentication result is updated to the client side portable terminal and the store. And transmitting to the side portable terminal.

  The electronic coupon usage system of the present invention is an electronic coupon usage system in which a client-side portable terminal acquires an electronic coupon issued by a store via a network, and the electronic coupon can be used by authentication of a server on the headquarters side. And the said store has a store side portable terminal, this store side portable terminal is a store side OTP production | generation part which produces | generates a one-time password (OTP) based on store identification information, store identification information, and production | generation. An encryption unit that encrypts the generated OTP, and a display unit that displays the generated encryption code. The client-side mobile terminal includes: a transmission / reception unit that accesses a network; and a coupon of the electronic coupon A display unit for displaying information in a readable manner, and a reading unit for reading an encryption code displayed by the store-side mobile terminal The server on the headquarters side stores the identification information of the electronic coupon issued by the store while storing the store identification information and the transmission / reception unit capable of transmitting and receiving with the client side portable terminal via the network. Correspondingly stored database, decoding unit that decodes the encryption code from the client-side mobile terminal into store identification information and OTP, server-side OTP generation unit that generates OTP based on the store identification information, and decoded store The identification information and the store identification information stored in the database are compared and the OTP generated by the server-side OTP generation unit and the OTP transmitted from the client-side portable terminal and decoded by the decoding unit are decoded from the store-side portable terminal. And a store authentication unit that authenticates the store, and the store authentication unit When authenticating the store, the coupon information of the electronic coupon in the database is updated based on the coupon information of the electronic coupon from the client side portable terminal, and the authentication result is transmitted to the client side portable terminal and the store side portable terminal. preferable.

  In the above system, the server on the headquarters side compares the coupon identification information of the electronic coupon from the client-side mobile terminal with the coupon identification information of the electronic coupon stored in the database, and authenticates the electronic coupon. When the store authentication unit authenticates the store and the coupon authentication unit authenticates the electronic coupon, the coupon information of the electronic coupon in the database is converted into coupon information of the electronic coupon from the client-side mobile terminal. It is preferable that the authentication result is transmitted to the client side portable terminal and the shop side portable terminal while updating based on the above.

  According to the present invention, since the OTP based on the store identification information and the store identification information is used when authenticating the store that issued the electronic coupon, the security for the store of the electronic coupon issuer can be improved, An electronic coupon can be used. Further, since the store authentication is performed simply by the client-side mobile terminal reading the encryption code displayed on the store-side mobile terminal and transmitting it to the head office server, the authentication operation is simplified.

It is a block diagram which shows the utilization system of the electronic coupon of one Embodiment of this invention. It is a block diagram which shows the detail of the utilization system of an electronic coupon. It is a figure which shows the sequence for utilizing an electronic coupon. It is a front view which shows the state which the client side portable terminal displayed the some electronic coupon. It is a front view which shows the state which the client side portable terminal displayed the one electronic coupon. It is a front view which shows the state which the shop side portable terminal displayed the encryption code. It is a front view which shows the state which displayed the encryption code which the client side portable terminal read. It is a front view which shows the example of a display of the authentication result in a client side portable terminal. It is a front view which shows the example of a display of the authentication result in a shop side portable terminal.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 is a block diagram showing an overall configuration of an electronic coupon utilization system 1 according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a main part of FIG.

  In the electronic coupon usage system 1 shown in FIG. 1, a customer has a client-side portable terminal 2 and the client-side portable terminal 2 is communicably connected to a headquarter-side server 6 via a network 3 such as the Internet. Is done. Electronic coupons are issued by stores. The store has a store computer 5 and a store-side mobile terminal 4 that can be connected to the store computer 5. The store computer 5 is connected to the head office server 6 so as to be accessible. This connection is made by the dedicated communication line 8 or the network 3. The electronic coupon is mutually accessed between the store computer 5 and the server 6 on the head office side. The electronic coupon is also accessed between the store computer 5 and the store-side mobile terminal 4. With these accesses, information on rewriting, addition and update of the electronic coupon is shared between the store computer 5, the server 6 on the headquarters side, and the store side portable terminal 4. The store-side mobile terminal 4 may be accessible to the headquarter-side server 6 via the communication line 8 or the network 3. In this case, the store computer 5 can be omitted.

  The store-side portable terminal 4 is a portable terminal that can be carried by a store clerk, and a smartphone, an iphon, a tablet (all are registered trademarks), and other portable terminals are used. Since the store-side mobile terminal 4 is portable in this way, the store clerk can easily present the store-side mobile terminal 4 to the customer by holding the store-side mobile terminal 4 when using the electronic coupon. can do.

  The store-side mobile terminal 4 includes a reading unit 41, a store-side OTP generation unit 42, an encoding unit 43, a display unit 44, a recording unit 45, a timer 47, a transmission / reception unit 48, and a control unit 49.

The reading unit 41 includes a CCD camera or the like and reads predetermined data.
The recording unit 45 records the store identification information and the coupon information of the electronic coupon transmitted from the store computer 5. A store ID or a password can be used as the store identification information. The coupon information of the electronic coupon is a service target such as a product or meal to be serviced, a service content such as a discount rate or a discount rate corresponding to each service target, and other information. In this case, the service content is recorded corresponding to the service target.
The transmission / reception unit 48 transmits / receives data to / from the store-side server 6 via the store computer 5. The transmission / reception unit 48 can directly transmit / receive to / from the store-side server 6 without using the store computer 5.

The store-side OTP generation unit 42 generates an OTP based on the store identification information recorded by the recording unit 45. The store-side OTP generation unit 42 generates an OTP that is a random number from a combination of the store identification information and the password generation time by a predetermined algorithm. The generated OTP is a disposable type and is updated for each use.
The timer 47 measures time and outputs the measured time to the store-side OTP generation unit 42. As a result, the store-side OTP generation unit 42 generates an OTP that combines the store identification information and the time.

The encoding unit 43 encodes information including the store identification information recorded in the recording unit 45 and the OTP generated by the store-side OTP generation unit 42 to generate an encryption code. As the encryption code, a matrix type two-dimensional code (QR code (registered trademark)) can be used.
The display unit 44 is formed by a touch panel, a liquid crystal panel, or the like, and displays predetermined data visually. In this embodiment, the display unit 44 displays the encryption code (QR code (registered trademark)) encrypted by the encoding unit 43 (see FIG. 5).

  The control unit 49 controls driving of the store side portable terminal 4. In this embodiment, the control unit 49 generates an OTP by the store-side OTP generation unit 42, generates an encryption code by the encoding unit 43, records store identification information or coupon information of an electronic coupon by the recording unit 45, and encrypts by the display unit 44. Control the display of code and other processing.

  The client-side mobile terminal 2 is a mobile terminal owned by a customer, and similarly to the store-side mobile terminal 4, a smartphone, an iphon, a tablet (all are registered trademarks), and other mobile terminals can be used. When using an electronic coupon in this embodiment, the customer goes to the store with the client-side mobile terminal 2 and presents it to the store clerk, so that the use of the electronic coupon is started.

  The client-side mobile terminal 2 includes a transmission / reception unit 21, a reading unit 22, a recording unit 23, a selection unit 24, a display unit 25, and a control unit 26.

The transmission / reception unit 21 performs communication with the server 6 on the headquarters side and other portable terminals 2 and other communication via the network 3.
The reading unit 22 is formed by a CCD camera or the like, and has the same function as a general camera. In this embodiment, the reading unit 22 reads the encryption code displayed on the display unit 44 of the store side portable terminal 4.

  The recording unit 23 records a plurality of electronic coupons received by the transmission / reception unit 21. When the recording unit 23 records a plurality of electronic coupons, the customer can select one necessary electronic coupon. The selection unit 24 performs this selection. This selection can be performed by touching a selection field displayed on the display unit 25 (see FIG. 4).

  The display unit 25 includes a touch panel and a liquid crystal panel, and displays an electronic coupon acquired via the network 3. FIG. 4 shows a display example of the acquired electronic coupon. When the recording unit 23 records a plurality of electronic coupons, the display unit 25 displays a list of the plurality of electronic coupons. When the display unit 25 displays a list of a plurality of electronic coupons, the selection unit 24 selects one electronic coupon by touching a display field displaying the necessary electronic coupons.

  The control unit 26 controls communication by the transmission / reception unit 21, reading by the reading unit 22, recording of an electronic coupon in the recording unit 23, display by the display unit 25, and other driving.

  The server 6 on the headquarter side includes a transmission / reception unit 61, a server-side OTP generation unit 62, a timer 63, a store authentication unit 64, a coupon authentication unit 60, a display unit 65, an input unit 66, an output unit 67, a decoding unit 68, and a control unit 69. And a database 70.

  The transmission / reception unit 61 communicates with the client-side portable terminal 2 via the network 3. The transmission / reception unit 61 communicates with the store computer 5 via the dedicated communication line 8 or the network 3, and can communicate with the store-side mobile terminal 4 via the network 3. The transmitter / receiver 61 communicates with the store computer 5 or the store-side mobile terminal 4 to input an electronic coupon issued by the store to the server 6. This electronic coupon is recorded in the database 70 (coupon database 72) of the server 6 as coupon information of the electronic coupon. Further, the transmission / reception unit 61 receives the electronic coupon transmitted from the client side portable terminal 2. Coupon information of the electronic coupon received from the client side portable terminal 2 is input to the coupon authentication unit 60 and used for authentication of the electronic coupon.

  The input unit 66 includes a keyboard or the like and inputs predetermined data. The output unit 67 includes a printer or the like and outputs predetermined data. The display unit 65 performs a predetermined display such as a store or electronic coupon authentication result.

  The decoding unit 68 restores the encryption code (QR code (registered trademark)) of the store-side mobile terminal 4 transmitted from the client-side mobile terminal 2 and decodes it into store identification information and OTP. The decoding unit 68 separates the decoded store identification information and the OTP, outputs the store identification information to the server-side OTP generation unit 62, and outputs the OTP to the store authentication unit 64.

  The server-side OTP generation unit 62 generates an OTP based on the store identification information, and has OTP generation software like the store-side OTP generation unit 42. The server-side OTP generation unit 62 and the store-side OTP generation unit 42 generate an OTP with the same algorithm, and therefore they have common OTP generation software. The server-side OTP generation unit 62 also generates an OTP that is a random number from a combination of the store identification information and the password generation time by a predetermined algorithm. The generated OTP is a single-use type and is updated for each use.

  The server-side OTP generation unit 62 generates an OTP based on the store identification information decoded by inputting the encryption code from the client-side portable terminal 2. This OTP is generated when an encryption code is input from the client-side mobile terminal 2. Not only this but the server side OTP production | generation part 62 may produce | generate OTP based on the shop identification information stored in the shop database 72 of the database 70. FIG. Even in this case, an OTP is generated when an encryption code is input from the client-side portable terminal 2. In any case, the generated OTP is output to the store authentication unit 64, and the store authentication unit 64 compares the OTP from the store side mobile terminal 4 input from the client side mobile terminal 2 to authenticate the store. .

  The timer 63 measures the time when the transmission / reception unit 61 receives the encrypted data from the client-side portable terminal 2 and outputs the measured time to the server-side OTP generation unit 62. The server-side OTP generation unit 62 generates an OTP based on the input time and store identification information.

The database 70 has at least a coupon database 71 and a store database 72.
The coupon database 71 stores coupon information of an electronic coupon issued by the store computer 5 or the store-side mobile terminal 4. The coupon information is made up of information such as discount rate, discount rate, service content such as discount rate, validity period, etc. for the service target, and these are classified into coupon identification information such as coupon IDs for identifying coupons and stored in the coupon database 71.
The store database 72 stores information on stores such as restaurants and merchandise stores. The store information is classified into store identification information such as a store ID for identifying the store and stored in the store database 72. The coupon ID in the coupon database 71 is stored in association with the store ID in the store database 72. When one store is selected from the store database 72, the electronic coupon issued by the store is used as the coupon ID. Drawn based on.
The information in the coupon database 71 and the store database 72 is updated so as to be the latest information by addition / deletion / correction or the like.

  The store authentication unit 64 authenticates the store by comparing the store identification information transmitted from the client-side portable terminal 2 and decoded by the decoding unit 68 with the store identification information stored in the store database 72. In addition to the authentication of the store identification information, the store authentication unit 64 compares the OTP generated by the server-side OTP generation unit 62 with the OTP transmitted from the client-side portable terminal 2 and decoded by the decoding unit 68, and stores the store. Certify. Thus, since the store authentication unit 64 not only compares the store identification information but also compares the OTP based on the store identification information to authenticate the store, security can be improved.

  As described above, the comparison of the OTP in the store authentication unit 64 is stored in the store database 72 of the OTP generated based on the store identification information decoded by inputting the encryption code from the client-side portable terminal 2 or the database 70. This can be done using OTP generated based on the store identification information. The store is authenticated by this OTP comparison. Since these OTPs are updated over a certain period of time, security can be improved by comparing OTPs in addition to comparing store identification information.

  Since the OTP is updated with the passage of time, it is necessary to match the date and time generated in the OTP comparison. However, in the store authentication unit 64, it may be difficult to match the date and time when the OTP is generated. is there. In this embodiment, the store authentication unit 64 sets a certain range of valid time for the OTP generated by the server-side OTP generation unit 62. For example, an effective time of 2 to 3 minutes before and after the comparison time is set. If it is determined that the authentication is successful when the OTPs are equal within the valid time, the authentication can be performed even if there is a slight time lag in OTP generation.

  The coupon authentication unit 60 authenticates the coupon identification information of the electronic coupon transmitted from the client portable terminal 2. Authentication in the coupon authentication unit 60 is performed by comparing the coupon identification information of the electronic coupon transmitted from the client side portable terminal 2 with the coupon identification information of the electronic coupon stored in the coupon database 71. As described above, in addition to the store authentication in the store authentication unit 64 described above, the coupon authentication unit 60 can further improve security by authenticating the coupon. The coupon authentication unit 60 is not an essential requirement and can be omitted.

  The control unit 69 controls the driving of the transmission / reception unit 61, the server-side OTP generation unit 62, the decoding unit 68, the input unit 66, the output unit 67, the display unit 65, the store authentication unit 64, and the coupon authentication unit 60. The information of the coupon database 71 and the store database 72 is pulled out and written.

  Next, a usage sequence according to this embodiment will be described with reference to FIG.

  Prior to the use of the electronic coupon, the store (the store-side mobile terminal 4 or the store computer 5) issues an electronic coupon (step S1). The issued electronic coupon is transmitted to the server 6 on the head office side, and the coupon information is stored in the coupon database 71 of the server 6 (step S2). When there are a plurality of stores, the coupon information is stored according to each store.

  In step S <b> 3, the client-side portable terminal 2 acquires an electronic coupon via the network 3. The acquired electronic coupon is recorded in the recording part 23 of the client side portable terminal 2 (step S4). When the client-side portable terminal 2 acquires a plurality of electronic coupons, the recording unit 23 of the client-side portable terminal 2 records the plurality of electronic coupons in association with the issued store.

  When a customer uses an electronic coupon, the customer selects a necessary electronic coupon from a plurality of electronic coupons recorded in the client-side mobile terminal 2 (step S5). FIG. 4 shows a display example of the display unit 25 in the client-side portable terminal 2 when a plurality of electronic coupons are acquired and recorded. The electronic coupon 81a is a coupon of “CD 500 yen discount coupon”, and the electronic coupon 81b is a coupon of “ramen 300 yen discount coupon”, and the contents of the coupon are listed over the electronic coupons 81c to 81h. In step S5, the customer touches and selects the display portion of the necessary electronic coupon for the display on the display unit 25. In this mobile phone, the electronic coupon 81b of “ramen 300 yen discount coupon” is selected.

  FIG. 5 shows a display example of the display unit 25 that is switched when the electronic coupon 81b is selected. The display unit 25 displays a store name (“Ramen AAA store”) 82, a use touch unit (“Use coupon”) 83, and a coupon service content (“Ramen 300 yen discount”) 84 in parallel. The customer presents this display unit to the store clerk of the store (ramen AAA store). By this presentation, the store clerk operates the store side portable terminal 4. By this operation, the store-side portable terminal 4 generates store identification information such as store ID and OTP based on the store identification information, encrypts the store identification information and the generated OTP, and generates an encryption code (QR code (registered trademark)). Generate (step S6).

  The store side portable terminal 4 displays the generated encryption code on the display unit 44 (step S7). FIG. 6 shows this display example, and the encryption code 85 is displayed on the display unit 44 together with the valid period 86 of the OTP. The client side portable terminal 2 reads the encryption code 85 by the reading unit 22 (step S8). FIG. 7 shows a display example in which the client-side portable terminal 2 displays the read encryption code. When the display unit 25 of the client side portable terminal 2 displays the encryption code 85, it can be confirmed that the encryption code of the store side portable terminal 4 has been read normally. The client-side mobile terminal 2 transmits the read encryption code 85 to the server 6.

  In the server 6, upon receiving the encryption code, the decoding unit 68 decodes the encryption code (step S9) and separates it into store identification information and OTP. And the server side OTP production | generation part 62 of the server 6 produces | generates OTP based on shop identification information (step S10). This OTP is generated based on store identification information decoded by inputting an encryption code from the client-side portable terminal 2. Alternatively, it is generated based on the store identification information stored in the store database 72 of the database 70.

  Thereafter, the store authentication unit 64 of the server 6 authenticates the store. This authentication is performed by comparing store identification information (step S11) and comparing OTP (step S12). The comparison in step S11 is performed by comparing the store identification information transmitted from the client-side portable terminal 2 and decoded by the decoding unit 68 (that is, the store identification information from the store-side portable terminal 4) and the store identification information stored in the store database 72. This is done by comparing When the store identification information matches, the store authentication unit 64 compares the OTP decoded by the decoding unit 68 with the OTP generated by the server-side OTP generation unit 62.

  When both the store identification information and the OTP match, the store authentication unit 64 authenticates that the store is a legitimate store, and authenticates that it is not a legitimate store when either of the two does not match. After authenticating that the store is a legitimate store, the electronic coupon is authenticated (step S13). That is, the coupon authentication part 60 authenticates whether the coupon identification information transmitted from the client side portable terminal 2 exists in the coupon database 71, and when it exists in the coupon database 71, it authenticates that an electronic coupon is regular.

  When authenticating that it is a regular store and a regular electronic coupon, the control unit 69 updates coupon information stored in the coupon database 71 (step S14). This update information is transmitted and received as the authentication result to the client side portable terminal 2 (step S15), and is transmitted to the store side portable terminal 4 and received (step S16). FIG. 8 shows a display example of the authentication result in the client-side portable terminal 2, and the store name 91, the result display 92, and the service content 93 are displayed in parallel. FIG. 9 is a display example of the authentication result in the store-side portable terminal 4, and the store name 94, the use result 95, and the service content 96 are displayed in parallel. The customer and the store clerk can confirm the use of the electronic coupon at the store by viewing these displays.

  In such an embodiment, since OTP based on the store identification information and the store identification information is used in authenticating the store that issued the electronic coupon, the security for the store from which the electronic coupon is issued can be improved. For this reason, a reliable electronic coupon can be used. Further, since the client-side portable terminal 2 reads the encryption code displayed on the store-side portable terminal 4 and transmits it to the headquarter-side server 6 to authenticate the store, the authentication operation is simplified. Furthermore, since both the store-side mobile terminal 4 and the client-side mobile terminal 2 used for authentication are portable terminals, the degree of freedom of the authentication location and the authentication timing is expanded, and authentication becomes easy.

  In the above embodiment, the server 6 includes the coupon authentication unit 60 in addition to the store authentication unit 64, but the present invention can omit the coupon authentication unit 60. For example, when one store issues one electronic coupon, since the electronic coupon is specified by the authentication of the store, the coupon authentication unit 60 in FIG. 2 becomes unnecessary, and authentication of the electronic coupon in FIG. 3 (step S13) ) Can be omitted. Even in this case, it is possible to use an electronic coupon with improved security.

  In the said embodiment, although the client side portable terminal 2 has acquired the some electronic coupon, in this invention, when the client side portable terminal 2 acquires a single electronic coupon, it can apply similarly. . In this case, the list display of the electronic coupon shown in FIG. 4 becomes unnecessary, and the selection thereof becomes unnecessary, and the display shifts directly to the display of the electronic coupon shown in FIG.

DESCRIPTION OF SYMBOLS 1 Electronic coupon utilization system 2 Client side portable terminal 3 Network 4 Store side portable terminal 6 Head office side server 22 Reading part 23 Recording part 24 Selection part 42 Store side OTP generation part 43 Encoding part 44 Display part 60 Coupon authentication part 61 Transmission / reception Unit 62 Server-side OTP generation unit 64 Store authentication unit 68 Decoding unit 70 Database 71 Coupon database 72 Store database

Claims (4)

A client-side mobile device obtains an electronic coupon via a network;
The store-side mobile terminal generates a one-time password (OTP) based on the store identification information, and displays an encryption code obtained by encrypting the generated OTP;
The client-side mobile terminal reads the encryption code displayed by the store-side mobile terminal and transmits it to the headquarters server;
The server on the head office side decodes the encryption code, compares the decoded store identification information with the store identification information stored in the server, generates an OTP based on the store identification information, and generates the generated OTP and the client side. Authenticating the store by comparing the OTP from the store-side mobile terminal transmitted via the mobile terminal;
When the server on the headquarters side authenticates the store, the coupon information of the stored electronic coupon is updated based on the coupon information of the electronic coupon from the client side portable terminal, and the authentication result is updated to the client side portable terminal and the store side portable terminal. A method of using the electronic coupon, comprising: The server on the headquarters side further includes a step of authenticating the electronic coupon by comparing the coupon identification information of the electronic coupon from the client side portable terminal with the coupon identification information of the stored electronic coupon,
When the server on the headquarters side authenticates the store and the electronic coupon, the coupon information of the stored electronic coupon is updated based on the coupon information of the electronic coupon from the client side portable terminal, and the authentication result is updated to the client side portable terminal and the store. The method of using the electronic coupon according to claim 1, further comprising: transmitting to the side portable terminal. An electronic coupon usage system in which a client-side mobile terminal obtains an electronic coupon issued by a store via a network and enables use of the electronic coupon by authentication of a server on the headquarters side,
  The store has a store-side portable terminal. The store-side portable terminal encrypts the store-side OTP generation unit that generates a one-time password (OTP) based on the store identification information, the store-identification information, and the generated OTP. An encoding unit that generates an encrypted code and a display unit that displays the generated encrypted code,
  The client-side mobile terminal includes a transmission / reception unit that accesses a network, a display unit that displays the coupon information of the electronic coupon in a readable manner, and a reading unit that reads an encryption code displayed by the store-side mobile terminal. ,
The server on the headquarters side stores the identification information of the electronic coupon issued by the store corresponding to the store identification information while storing the transmission / reception unit capable of transmission / reception via the network with the client side portable terminal and the store identification information. , A decoding unit that decodes the encryption code from the client-side portable terminal into store identification information and OTP, a server-side OTP generation unit that generates OTP based on the store identification information, and the decoded store identification information and database The OTP generated by the server-side OTP generation unit and the OTP transmitted from the client-side mobile terminal and decoded by the decoding unit are compared with the store identification information stored in the store. And a store authentication unit that authenticates the store,
When the store authentication unit authenticates the store, the coupon information of the electronic coupon in the database is updated based on the coupon information of the electronic coupon from the client side portable terminal, and the authentication result is updated on the client side portable terminal and the store side portable terminal. A system for using an electronic coupon, characterized by being transmitted to The server at the headquarters side further includes a coupon authentication unit that authenticates the electronic coupon by comparing the coupon identification information of the electronic coupon from the client-side mobile terminal with the coupon identification information of the electronic coupon stored in the database. ,
When the store authentication unit authenticates the store and the coupon authentication unit authenticates the electronic coupon, the coupon information of the electronic coupon in the database is updated and authenticated based on the coupon information of the electronic coupon from the client-side mobile terminal. 4. The electronic coupon usage system according to claim 3, wherein the result is transmitted to the client side portable terminal and the shop side portable terminal.

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