JP2014227677A - Locking and unlocking system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking and unlocking system that can enhance security while reducing a frequency of disabling unlocking.SOLUTION: In a locking and unlocking device 22, an electric lock 21a becomes a locking state by using a password set according to a locking request from a mobile terminal 40. In this case, the password is encrypted by using an encryption key received from a server 30 and a code C for password acquisition is generated, and thereby the code C for this password acquisition is associated with user identification and stored in a memory unit 24. Also, when the user identification is acquired from the mobile terminal 40 receiving an unlocking request, the code C for password acquisition stored in association with this user identification is displayed on a display unit 25. Then, in the mobile terminal 40, the imaged code C for password acquisition is decoded by using a decryption key stored in a memory unit 42, so that this password is displayed on a display unit 44 when the password is acquired.

Description

  The present invention relates to a locking / unlocking system that locks / unlocks an electric lock using a mobile terminal.

  Conventionally, for example, a locker system disclosed in Patent Document 1 below is known as a technique related to a locking / unlocking system that locks / unlocks an electric lock using a mobile terminal. In this locker system, when a bar code label displayed in a hangar to be stored is read by a bar code reader, the read bar code information is transmitted to a key management device together with a lock or unlock command. When the position of the hangar is specified by the key management device based on the barcode information, a command to lock or unlock the electric lock of the corresponding hangar is transmitted to the locker management device of the lockable cabinet.

  Moreover, in the locker system disclosed in Patent Document 2 below, when a password is input after a locker use request is input to the locker management device, the corresponding individual box is locked. Then, the two-dimensional barcode information generated by encrypting the input personal identification number, locker identification information, individual box identification information and the like and the corresponding individual box identification information are printed. Thereafter, when unlocking the individual box, the individual box is unlocked by inputting the personal identification number after reading the printed two-dimensional barcode over the reading unit of the locker management device.

JP 2003-166370 A JP 2007-186918 A

  By the way, in the locking / unlocking system using the information code as disclosed in Patent Document 1, anyone can lock / unlock as long as the information code is acquired. Therefore, the locking / unlocking system is required to have high security. There is a problem that you can not. On the other hand, in the locking / unlocking system using the information code and the password as disclosed in Patent Document 2, it is necessary to have both the information code and the password, and the security of the locking / unlocking system is increased. Can be increased.

  However, in a system configuration in which the user needs to have both a barcode and a password, if the barcode is lost or the password is forgotten, it will be impossible to unlock. Problems arise.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a locking / unlocking system that can improve security while reducing the frequency of unlocking.

In order to achieve the above object, the invention according to claim 1 of the present invention is intended to unlock the electric lock according to the input operation of the lock means (23) for setting the electric lock (21a) and the password. A locking / unlocking device (22) having an unlocking means (23) for bringing into a locked state, a portable terminal (40) carried by a user using the locking / unlocking device, and obtaining a code number obtained by encrypting the code number A locking / unlocking system (10) comprising: a server (30) for managing an encryption key used when generating the code (C) and decoding the code acquisition code. Server-side communication means (35) for communicating with the apparatus and the portable terminal, and in response to a request from the user, specific information for specifying the user and the encryption key are transmitted to the portable via the server-side communication means. Send to device Server-side information control means (31) and server-side storage means (32) in which the specific information and the encryption key transmitted to the portable terminal are stored in association with each other, and the server-side information control means Receives the specific information from the locking / unlocking device via the server-side communication means, and transmits the encryption key stored in the server-side storage means in association with the received specific information to the locking / unlocking device. The portable terminal stores the terminal-side communication means (46) communicating with the locking / unlocking device and the server, and the encryption key and the specific information received from the server via the terminal-side communication means. The terminal side storage means (42) and the specific information stored in the terminal side storage means at the time of locking request or unlock request are sent to the locking / unlocking device via the terminal side communication means. Terminal-side information control means (41), imaging means (43) for imaging the code number acquisition code, and the code number acquisition code imaged by the imaging means are stored in the terminal-side storage means Decoding means (41) for obtaining the personal identification number by decoding using the decryption key; and terminal-side display means (44) for displaying the personal identification number obtained by the decoding means; The locking device includes a device-side communication unit (27) that communicates with the server and the portable terminal, and the specific information acquired from the portable terminal that has received the locking request via the device-side communication unit. An apparatus-side information control means (23) for transmitting and receiving the encryption key from the server in response to the transmission, and a setting means (23) for setting the personal identification number in response to the locking request A code generation means (23) for encrypting the password set by the setting means using the encryption key received from the server and generating the code for acquiring the password, and generated by the code generation means The device-side storage means (24) in which the code for acquiring the code number is stored in association with the specific information, and the specific information from the portable terminal that has received the unlock request via the device-side communication means Is acquired, the device-side display means (25) for displaying the code number acquisition code stored in the device-side storage means in association with the specific information, and the input means for inputting the password number (26), wherein the locking means locks the electric lock using the personal identification number set by the setting means, and the unlocking means inputs the input means. The electric lock is set in an unlocked state when the password entered in accordance with the operation matches the password obtained from the code for obtaining the password displayed on the device-side display means. .
In addition, the code | symbol in each said parenthesis shows the correspondence with the specific means as described in embodiment mentioned later.

  In the invention of claim 1, in the locking / unlocking device, the electric lock is locked using the password set in response to the locking request from the portable terminal. At this time, the code number is encrypted using the encryption key received from the server to generate a code number acquisition code, and the code number acquisition code is stored in association with the specific information. When the specific information is acquired from the mobile terminal that has received the unlock request, a code for acquiring the personal identification number stored in association with the specific information is displayed. In the portable terminal, when the code number is acquired by decoding the captured code number acquisition code using the decryption key stored in the terminal-side storage unit, the code number is displayed on the terminal-side display unit. The

  Thereby, the user can set the electric lock to the unlocked state by inputting the personal identification number displayed on the terminal side display means of the portable terminal to the locking / unlocking device according to the input operation of the input means. it can. In particular, it is possible to eliminate the need for the user to remember the personal identification number or possess an information code such as a personal identification number acquisition code. Therefore, it is possible to improve security while reducing the frequency at which unlocking becomes impossible.

  In the invention of claim 2, the setting means sets the personal identification number at random. Thus, even if a personal identification number is set at random in order to improve security, the user does not need to remember the personal identification number, so that it is possible to further improve security while reducing the frequency of unlocking. .

It is explanatory drawing which shows schematically the structure of the locking / unlocking system which concerns on this embodiment. It is a block diagram which shows roughly the electric structure of a rocker apparatus. It is a block diagram which shows roughly the electrical structure of a server. It is a block diagram which shows roughly the electric constitution of a portable terminal. It is explanatory drawing explaining the flow of a user registration process. It is explanatory drawing explaining the flow of a user registration process. It is explanatory drawing explaining the flow of the encryption key acquisition process and locking process by a locking / unlocking apparatus. It is explanatory drawing explaining the flow of the encryption key acquisition process and locking process by a locking / unlocking apparatus. It is explanatory drawing explaining the flow of the code display process for code number acquisition by a locking / unlocking apparatus, and the unlocking process. It is explanatory drawing explaining the flow of the code display process for code number acquisition by a locking / unlocking apparatus, and the unlocking process.

Hereinafter, an embodiment embodying a locking / unlocking system according to the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram schematically showing the configuration of a locking / unlocking system 10 according to the present embodiment.
The locking / unlocking system 10 shown in FIG. 1 mainly includes a locker device 20 and a server 30 and a mobile terminal 40 carried by a user, and is configured as a system that locks and unlocks the locker device 20 using the mobile terminal 40. ing.

First, the locker device 20 will be described with reference to FIGS. 1 and 2. FIG. 2 is a block diagram schematically showing the electrical configuration of the rocker device 20.
As shown in FIGS. 1 and 2, the locker device 20 includes a plurality of lockers 21 and a locking / unlocking device 22 that electrically controls the locking / unlocking state of each locker 21. An electric lock 21a is disposed inside the door of each locker 21, and the locking and unlocking state of each electric lock 21a is controlled by the locking and unlocking device 22 to control the locking and unlocking of the locker 21. Is done. In FIG. 1, for convenience, some of the plurality of lockers 21 are illustrated.

  As shown in FIG. 2, the locking / unlocking device 22 includes a control unit 23, a storage unit 24, a display unit 25, an operation unit 26, a communication unit 27, and the like. The control unit 23 is composed mainly of a microcomputer, and performs overall control and various calculations of the locking / unlocking device 22, and locks the electric lock 21a of the locker 21 using a password set as described later. In addition to functioning as a locking means for setting the state, it also functions as an unlocking means for setting the electric lock 21a to the unlocked state by inputting the set password. In addition, the control unit 23 acquires the encryption key from the server 30 by executing the encryption key acquisition process at the time of the lock request, and uses the encryption key by executing the code number acquisition code display process at the time of the unlock request. It functions to display a code C for obtaining a code number obtained by encrypting the code number. The control unit 23 may correspond to an example of “apparatus side information control unit”.

  The storage unit 24 is configured by a known storage medium such as a ROM, a RAM, an HDD, or a nonvolatile memory, and stores a program for an encryption key acquisition process, a code display process for acquiring a password, or other various data. It has become so. The storage unit 24 may correspond to an example of “apparatus side storage unit”.

  The display unit 25 can correspond to an example of “apparatus side display means” and is configured by a liquid crystal display or the like. The display unit 25 is controlled by the control unit 23 to display predetermined information including the code number acquisition code C. It has the function to do.

  The operation unit 26 may correspond to an example of an “input unit” and includes a plurality of keys and the like, and has a function of inputting information corresponding to a key input operation to the control unit 23.

  The communication unit 27 may correspond to an example of “apparatus side communication means”, and is configured as a communication interface for performing data communication with an external device in a wired or wireless manner, and cooperates with the control unit 23. Thus, it has a function of performing communication processing. The communication unit 27 can communicate with the server 30 via the network N such as the Internet, and is configured to be capable of short-range wireless communication with the portable terminal 40 held over the holding surface 27a. The holding surface 27a is provided in the vicinity of the display unit 25, the operation unit 26, etc., as shown in FIG.

Next, the server 30 will be described with reference to FIGS. 1 and 3. FIG. 3 is a block diagram schematically showing the electrical configuration of the server 30.
As shown in FIG. 1, the server 30 is configured as a computer that manages the above-described encryption key, and is connected to the locker device 20, the portable terminal 40, and the like via the network N. As shown in FIG. 3, the server 30 includes a control unit 31 that controls the entire server 30 as a whole, a storage unit 32 including ROM, RAM, HDD, and the like, an input unit 33 configured as a mouse, a keyboard, and the like, a liquid crystal display A display unit 34 configured as a monitor and the like, a communication unit 35 configured as a LAN interface, and the like are provided.

  The storage unit 32 stores a database 32a in which a user ID and an encryption key issued in accordance with a user registration process executed by the control unit 31 are stored in association with each other. The control unit 31 corresponds to an example of “server side information control unit”, the storage unit 32 corresponds to an example of “server side storage unit”, and the communication unit 35 includes an example of “server side communication unit”. Can correspond to

Next, the portable terminal 40 will be described with reference to FIGS. 1 and 4. FIG. 4 is a block diagram schematically showing the electrical configuration of the mobile terminal 40.
The mobile terminal 40 shown in FIGS. 1 and 4 is, for example, a mobile phone, and optically reads the above-described code number acquisition code C by installing an application program acquired from the server 30 during the user registration process. A terminal configured as a possible optical information reader.

  As shown in FIG. 4, the mobile terminal 40 includes a control unit 41 composed of a CPU, a storage unit 42 composed of a ROM, a RAM, a nonvolatile memory, etc., and a light receiving sensor (for example, a C-MOS area sensor, a CCD area sensor, etc.). An imaging unit 43 configured as a camera, a display unit 44 including a liquid crystal display, an operation unit 45 configured with various operation keys, a communication unit 46 configured as a communication interface for communicating with an external device, and the like. ing. The storage unit 42 may correspond to an example of “terminal side storage unit”, the imaging unit 43 may correspond to an example of “imaging unit”, and the display unit 44 may correspond to an example of “terminal side display unit”. .

  In particular, the communication unit 46 may correspond to an example of “terminal side communication means”, and is controlled by the control unit 41 and is connected to the server via the network N by a known communication method via an unillustrated antenna. Communication with 30 etc. and short-distance wireless communication with the locking / unlocking device 22 are performed.

  In the portable terminal 40 configured in this manner, when a predetermined operation is input to the operation unit 45, a predetermined signal is output from the communication unit 46 controlled by the control unit 41, and the locking and unlocking device 22. The lock request state for requesting the lock or the unlock request state for requesting the unlock. In addition, when a predetermined operation is input to the operation unit 45, the mobile terminal 40 performs a reading process by the control unit 41, and uses an encryption key stored in the storage unit 42 as described later. The code number acquisition code C picked up by the image pickup unit 43 is in a reading state in which it can be decoded. The control unit 41 may correspond to an example of “terminal side information control unit” and “decoding unit”.

  Next, in the locking / unlocking system 10 configured as described above, user registration processing by the server 30 and locking / unlocking processing by the locking / unlocking device 22 will be described with reference to FIGS. 5 and 6 are explanatory diagrams for explaining the flow of the user registration process. 7 and 8 are explanatory diagrams for explaining the flow of the encryption key acquisition process and the locking process performed by the locking / unlocking device 22. 9 and 10 are explanatory diagrams for explaining the flow of the code number acquisition code display process and the unlocking process by the locking / unlocking device 22. FIG.

First, the flow of user registration processing executed by the control unit 31 of the server 30 in response to a user request will be described below with reference to FIGS.
A user who wishes to use the locker device 20 accesses the server 30 using the portable terminal 40 (S11 in FIG. 6), and requests user registration by transmitting predetermined information such as personal information ( S12 in FIGS. 5 and 6).

  In the server 30, when a user registration request is received from the mobile terminal 40, a user ID is set as specific information for specifying the user by the control unit 31, an encryption key is set, and the user ID and the encryption key are associated with each other. Then, user registration is performed by being stored in the database 32a (S13). For example, in the example shown in FIG. 5, when the user IDs “000001” and “000002” have been issued, and the user ID “000003” is issued, the encryption keys of “000001” and “000002” have different values. An encryption key (“33333333333333” in FIG. 5) is set and stored in the database 32a in association with the user ID. Note that the encryption key may be set to a value unrelated to the user ID, or may be set to a value related to the user ID. And the control part 31 issues a user ID and an encryption key by transmitting the user ID and encryption key which were set as mentioned above to the portable terminal 40 (S14).

  When the mobile terminal 40 receives and acquires the user ID and the encryption key from the server 30 (S15), the user ID and the encryption key are stored in the storage unit 42. Thereby, user registration is completed and the user who has the portable terminal 40 will be in the state which can use the locker apparatus 20 at any time.

Next, encryption key acquisition processing and locking processing by the locking / unlocking device 22 will be described below with reference to FIGS.
The user who has arrived at the place where the locker device 30 is installed enters a locker number for identifying the locker in the locker 21 to be used among the plurality of lockers 21 and inputs the locker number corresponding to the input operation of the operation unit 26. Then, the user makes a locking request by holding the portable terminal 40 that is in the locking request state by performing a predetermined operation on the operation unit 45 over the holding surface 27a (S21 in FIG. 8). Thereby, the user ID memorize | stored in the memory | storage part 42 of the portable terminal 40 is transmitted to the locking / unlocking apparatus 22 with a locking request | requirement (S22 of FIG. 7 and FIG. 8).

  In the locking / unlocking device 22, when the user ID is received from the portable terminal 40 together with the locking request, the control unit 23 starts the encryption key acquisition process, and the user ID is transmitted to the server 30 (S23, S24).

  In the server 30, when the user ID is received from the locking / unlocking device 22, the control unit 31 reads the encryption key associated with the user ID from the database 32a and transmits it to the locking / unlocking device 22 (S25, S26). For example, as illustrated in FIG. 7, if the received user ID is “000003”, the encryption key “33333333333333” is transmitted to the locking / unlocking device 22.

  In the locking / unlocking device 22, the encryption key acquisition process is completed by receiving and acquiring the encryption key from the server 30. Next, after the lock process is started by the control unit 23 and a password for locking the locker 21 is randomly set, the electric lock 21a of the locker 21 is controlled to be locked using the set password. (S27). As a result, the locker 21 used by the user is locked, and the luggage in the locker 21 cannot be taken out.

  Subsequently, the code number used for locking as described above is encrypted using the received encryption key, and the code C for acquiring the code number is generated. The security code acquisition code C generated in this way is stored in the storage unit 24 in association with the user ID, locker number, security code, and the like (S28). Then, a lock completion notification indicating that the lock has been completed is sent to the mobile terminal 40 (S29). In addition, the control part 23 which performs the said locking process may correspond to an example of a "setting means" and a "code generation means".

  When the mobile terminal 40 receives the lock completion notification from the lock / unlock device 22, the lock completion notification is given to the user by displaying the fact on the display unit 44 (S <b> 29 a). The user who has received this notification can grasp that the locker 21 has been locked.

Next, the code number acquisition code display process and the unlocking process by the locking / unlocking apparatus 22 will be described below with reference to FIGS. 9 and 10.
A user desiring to unlock the locker 21 locked as described above performs a predetermined operation on the operation unit 45 to hold the portable terminal 40 in the unlocking request state over the holding surface 27a. A request is made (S31 in FIG. 10). Thereby, the user ID memorize | stored in the memory | storage part 42 of the portable terminal 40 is transmitted to the locking / unlocking apparatus 22 with an unlocking request | requirement (S32 of FIG. 9 and FIG. 10).

  In the locking / unlocking device 22, when the user ID is received together with the unlocking request from the portable terminal 40, a code number acquisition code display process is performed by the control unit 23 and stored in the storage unit 24 in association with the received user ID. The code C for obtaining the code number is displayed on the display unit 25 (S33, S34). Thereafter, the locking / unlocking device 22 enters a standby state waiting for the input of the password.

  The user images the personal identification number acquisition code C displayed on the display unit 25 by using the portable terminal 40 that is in a reading state by performing a predetermined operation on the operation unit 45. As a result, the captured code number acquisition code C is decoded using the encryption key stored in the storage unit 42, and the code number is acquired (S35). The personal identification number acquired in this way is displayed on the display unit 44 (S36). For example, when the personal identification number is set to “1234”, “1234” is displayed as the personal identification number on the display unit 44 as shown in FIG. The user who sees the password displayed in this way inputs the password by operating the operation unit 26 of the locking / unlocking device 22 (S37).

  In the locking / unlocking device 22, the personal identification number input by the control unit 23 is compared with the personal identification number associated with the user ID (the personal identification number when the personal identification number acquisition code C is generated). The unlocking process is performed and the electric lock 21a of the locker 21 is controlled to the unlocked state (S38). Thereby, the locker 21 used by the user is unlocked, and the user can take out the luggage in the locker 21.

  As described above, in the locking / unlocking system according to the present embodiment, in the locking / unlocking device 22, the electric lock 21a is locked using the password set in response to the locking request from the portable terminal 40. At this time, the code number is encrypted by using the encryption key received from the server 30 to generate a code number acquisition code C, and the code number acquisition code C is stored in the storage unit 24 in association with the user ID. Is done. When the user ID is acquired from the portable terminal 40 that has received the unlock request, the code C for acquiring the personal identification number stored in association with the user ID is displayed on the display unit 25. When the personal identification number is acquired by decoding the captured personal identification number acquisition code C using the decryption key stored in the storage unit 42, the personal identification number is displayed on the display unit 44. The

  Thereby, the user inputs the personal identification number displayed on the display unit 44 of the portable terminal 40 to the locking / unlocking device 22 in accordance with the input operation of the operation unit 26, thereby bringing the electric lock 21a into the unlocked state. can do. In particular, it is possible to eliminate the need for the user to remember the personal identification number or possess an information code such as the personal identification number acquisition code C. Therefore, it is possible to improve security while reducing the frequency at which unlocking becomes impossible.

  In particular, in this embodiment, since the user inputs the personal identification number with his / her hand, the user can be given a sense of security. This is because a locker that is unlocked simply by holding a portable terminal, IC card, etc. is too simple and does nothing on its own, which may give anxiety to the user.

  In the present embodiment, since a general mobile phone having an imaging function can be used, it is not necessary to prepare a dedicated IC card or the like and have the user purchase it. In particular, unlike the case of using a dedicated IC card or the like, since the use history does not remain, the user can use the present locking / unlocking system 10 with peace of mind.

  Further, even if a personal identification number is set at random in order to improve security, it is not necessary for the user to memorize the personal identification number, so that it is possible to further improve security while reducing the frequency of the unlocking being impossible.

  Note that the control unit 23 is not limited to randomly setting the password, but may set the password according to a predetermined rule.

In addition, this invention is not limited to the said embodiment, For example, you may actualize as follows.
(1) In the locking / unlocking device 22, even when the lock request is made, the encryption key is not generated, but the encryption key is stored in the storage unit 24 in association with the user ID, locker number, password, etc. Good. In this case, at the time of unlocking request, the code number is encrypted using the encryption key stored in the storage unit 24 to generate the code number acquisition code C, and the generated code number acquisition code C is generated. Is displayed on the display unit 25. This also eliminates the need for the user to remember the security code or possess an information code such as the security code acquisition code C, and reduces the frequency of unlocking while reducing security. Can be increased.

(2) In order to further improve the confidentiality of the personal identification number, a partially private code can be adopted as the personal identification number acquisition code C. This partially private code is configured as an information code having a public area and a private area in which information encrypted to be decrypted using an encryption key is recorded. For this reason, by recording information that should be kept secret such as a personal identification number in a non-public area, a code reader that does not have an encryption key can read only the information recorded in the public area, and other information is recorded. Therefore, it is possible to improve the confidentiality of the personal identification number and the like.

(3) In the locking / unlocking device 22, the password is temporarily displayed on the display unit 25 at the time of locking, so that the password entered together with the locker number on the operation unit 26 becomes the password used when the locker 21 is locked. If they match, the electric lock 21a may be controlled to the unlocked state. Thereby, even if it is a user who remembers a PIN, the locker 21 can be unlocked without using the portable terminal 40.

(4) The locking / unlocking system according to the present invention is not limited to the system that manages the locker device 30 as described above, and may be any system that manages the locking / unlocking device that locks / unlocks the electric lock. be able to.

DESCRIPTION OF SYMBOLS 10 ... Locking / unlocking system 20 ... Locker device 21 ... Locker 21a ... Electric lock 22 ... Locking / unlocking device 23 ... Control part (Locking means, unlocking means, apparatus side information control means, setting means, code generation means)
24. Storage unit (device-side storage means)
25. Display section (apparatus side display means)
26 ... operation unit (input means)
27. Communication unit (apparatus side communication means)
30 ... server 31 ... control unit (server-side information control means)
32 ... Storage unit (server-side storage means)
35. Communication unit (server side communication means)
40 ... mobile terminal 41 ... control unit (terminal side information control means, decoding means)
42. Storage unit (terminal-side storage means)
43 ... Imaging unit (imaging means)
44 ... Display section (terminal side display means)
46. Communication unit (terminal side communication means)
C ... PIN code acquisition code

Claims (2)

A locking / unlocking device having locking means for locking the electric lock and unlocking means for unlocking the electric lock in response to an input operation of a personal identification number;
A portable terminal carried by a user using the locking and unlocking device;
A server that manages an encryption key used at the time of generating a code for acquiring a code number obtained by encrypting the code number and decoding the code for acquiring the code number;
A locking / unlocking system comprising:
The server
Server-side communication means for communicating with the locking and unlocking device and the portable terminal;
In response to a request from the user, server-side information control means for transmitting the specific information for specifying the user and the encryption key to the mobile terminal via the server-side communication means;
Server-side storage means for storing the specific information transmitted to the portable terminal and the encryption key in association with each other,
When the server-side information control unit receives the specific information from the locking / unlocking device via the server-side communication unit, the server-side information control unit associates the encryption key stored in the server-side storage unit with the received specific information. Sent to the locking and unlocking device,
The portable terminal is
Terminal-side communication means for communicating with the locking / unlocking device and the server;
Terminal-side storage means for storing the encryption key and the specific information received from the server via the terminal-side communication means;
Terminal-side information control means for transmitting the specific information stored in the terminal-side storage means at the time of locking request or unlocking request to the locking / unlocking device via the terminal-side communication means;
Imaging means for imaging the code for obtaining the code number;
Decoding means for obtaining the personal identification number by decoding the code for obtaining the personal identification number imaged by the imaging means using the decryption key stored in the terminal-side storage means;
Terminal-side display means for displaying the personal identification number acquired by the decoding means,
The locking and unlocking device is
Device-side communication means for communicating with the server and the portable terminal;
Device-side information control means for transmitting the specific information acquired from the portable terminal that has received the locking request to the server via the device-side communication means and receiving the encryption key from the server in response to the transmission; ,
Setting means for setting the personal identification number in response to the locking request;
Code generating means for generating the code acquisition code by encrypting the code set by the setting using the encryption key received from the server;
Device-side storage means for storing the code number acquisition code generated by the code generation means in association with the specific information;
When the specific information is acquired from the portable terminal that has received the unlock request via the device-side communication means, the code for acquiring the personal identification number is stored in the device-side storage means in association with the specific information Device-side display means for displaying
Input means for inputting the personal identification number,
The locking means uses the personal identification number set by the setting means to lock the electric lock,
The unlocking means, when the password entered in response to the input operation of the input means matches the password acquired from the password acquisition code displayed on the device display means. A locking / unlocking system characterized in that the lock is unlocked.   The locking / unlocking system according to claim 1, wherein the setting means sets the personal identification number at random.

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