JP2010229649A - Electronic unlocking system, server, user terminal, electric lock terminal, and information processing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic unlocking system allowing a third party to unlock an electric lock as required. <P>SOLUTION: In this electronic unlocking system, a set terminal 1 transmits the date of unlocking and the information for distinguishing a user to a server 2. The server 2 receives the date of unlocking and the information for distinguishing the user and transmits the information for unlocking the electronic key including the information obtained by at least encrypting the date of unlocking to destination for sending corresponding to the information for distinguishing the user. The user terminal unit 3 receives the information for unlocking the electronic key and outputs the information. The electric lock terminal 4 accepts the information for unlocking the electronic key outputted from the user terminal 3, decodes the encrypted information included in the information for unlocking the electronic key to obtain the date of unlocking, compares the date of unlocking with current date to determine whether the information for unlocking the electronic key is correct or not, and unlocks the electric lock 5 if the information is correct. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electronic unlocking system that enables electrical unlocking of an electric lock.

  Conventionally, the house key is generally managed by the resident of the house, and it is common not to leave it to a third party. However, with the diversification of services in the distribution industry in recent years, A service has also been started in which a home key is deposited and fresh products are delivered directly to a refrigerator (see Non-Patent Document 1, for example).

“Death fight! Winter of price increase-who decides the price [The secret of small retail to win!]”, [Online], [Search March 10, 2009], Internet (URL: http://www.tv-tokyo.com) co.jp/gaia/backnumber/preview080122.html), 2008

  However, in the method described in the above-mentioned Non-Patent Document 1, how far a company that provides such a service can be trusted, and there is a risk that the deposited key may be misused by a third party. There may be worries such as not. Therefore, there is a problem that those who are worried cannot enjoy the service described in Non-Patent Document 1.

  Generally speaking, even if a third party can unlock the electric lock, there is a problem that the third party wants to be able to unlock the electric lock within the necessary range. there were.

  The present invention has been made to solve such a problem, and provides an electronic unlocking system and the like for allowing a third party to unlock the electric lock within a necessary range. For the purpose.

  To achieve the above object, an electronic unlocking system according to the present invention is an electronic unlocking system comprising a setting terminal, a server, a user terminal, and an electric lock terminal, wherein the setting terminal is an electric lock. The unlocking date and time receiving unit that receives the input of the unlocking date and time that is the date and time of unlocking, the user identification information receiving unit that receives the user identification information for identifying the user performing the unlocking, and the unlocking date and time reception A setting transmission unit that transmits the unlocking date and time received by the unit and the user identification information received by the user identification information reception unit to the server, wherein the server transmits the unlocking information transmitted by the setting transmission unit. A setting receiving unit that receives the lock date and time and the user identification information, a first encryption key information storage unit that stores first encryption key information that is information used for encryption, and the first encryption key information storage The first encryption key information stored in the The setting receiving unit receives the unlocking electronic key information including at least the unlocking date and time encrypted by the encryption unit and the unlocking electronic key information encrypted at least by the setting receiving unit. An unlocking electronic key information transmission unit that transmits to a destination corresponding to the user identification information, and the user terminal receives the unlocking electronic key information transmitted by the unlocking electronic key information transmission unit. An electronic key information receiving unit, an unlocking electronic key information storing unit that stores the unlocking electronic key information received by the unlocking electronic key information receiving unit, and an unlocking electronic key stored by the unlocking electronic key information storage unit An unlocking electronic key information output unit for outputting information, and the electric lock terminal receives an unlocking electronic key information output from the unlocking electronic key information output unit; Corresponding to the date and time acquisition unit for acquiring the date and time and the first encryption key information. A second encryption key that is information and is used to acquire the information before encryption corresponding to the encrypted information included in the unlocking electronic key information received by the unlocking electronic key information receiving unit Using the second encryption key information storage unit for storing information and the second encryption key information stored in the second encryption key information storage unit, the unlocked electronic key received by the unlocking electronic key information receiving unit A pre-encryption information acquisition unit that acquires pre-encryption information that is pre-encrypted information corresponding to the encrypted information included in the key information, the current date and time acquired by the date and time acquisition unit, and the pre-encryption information A determination unit for determining whether or not the unlocking electronic key information received by the unlocking electronic key information receiving unit is valid using at least an acquisition result by the information acquiring unit; and the unlocking electronic key information receiving unit The unlocking electronic key information received by the Then, when it is determined by the determination unit, an unlocking unit that unlocks the electric lock is provided.

  With such a configuration, unlocking electronic key information designating the date and time for unlocking the electric lock can be issued, and as a result, the electric lock can be unlocked only at that date and time. For example, when a distributor receives a service that brings fresh food to their homes, by specifying the date and time that the fresh food will be brought, the distributor can use the electric lock only for that date and time. Can be unlocked. In addition, since the unlocking date and time included in the unlocking electronic key information is at least encrypted, it is possible to prevent the user or the like from changing the unlocking date and time without permission. Furthermore, the electric lock terminal in this electronic unlocking system can determine whether or not the received unlocking electronic key information is valid without inquiring an external server or the like. Therefore, there is an advantage that the electric lock terminal can be configured as a stand-alone device and can be easily added to existing equipment. For example, when installing an electric lock terminal that unlocks an electric lock on a door of a residence, if communication equipment is also necessary, a large-scale construction is required. However, communication equipment such as a stand-alone electric lock terminal according to the present invention is required. When it is not necessary, it will be possible to install it with a simple construction that replaces the door knob.

In the electronic unlocking system according to the present invention, the setting terminal further includes an electric lock identification information storage unit that stores electric lock identification information for identifying an electric lock, and the setting transmission unit includes an unlocking date and time, The user identification information and the electric lock identification information stored in the electric lock identification information storage unit are transmitted to the server, and the setting reception unit includes the unlocking date and time, the user identification information, and the electric lock identification. Information, and the first encryption key information storage unit stores the first encryption key information and the electric lock identification information in association with each other, and the encryption unit receives the setting reception unit. Encryption may be performed using first encryption key information corresponding to the received electric lock identification information.
With such a configuration, the first encryption key information is different for each electric lock, and the safety is further improved.

  In the electronic unlocking system according to the present invention, the unlocking electronic key information transmitted by the unlocking electronic key information transmitting unit also includes user identification information corresponding to the transmission destination of the unlocking electronic key information. The electric lock terminal includes user identification information included in the unlocking electronic key information, a date and time acquired by the date and time acquisition unit when the unlocking electronic key information is received, and the unlocking You may further provide the accumulation | storage part which matches and accumulate | stores the determination result by the said determination part corresponding to electronic key information.

  With such a configuration, it becomes possible to know the identification information of the user, the date and time of unlocking, and the presence or absence of unlocking in the electric lock terminal. Therefore, the accumulated information makes it easy to check whether, for example, the user who was scheduled to visit has actually visited, or whether there was a person who attempted to unlock even though there was no planned visit. You will be able to know.

  In the electronic unlocking system according to the present invention, the unlocking electronic key information transmitted by the unlocking electronic key information transmitting unit also includes the number of times of unlocking, and the determination unit stores the result of accumulation by the accumulating unit. The unlocking according to the number of times of unlocking included in the unlocking electronic key information received by the unlocking electronic key information receiving unit corresponds to the user identification information included in the unlocking electronic key information. If it has already been performed, it may be determined that the unlocking electronic key information is not valid.

  With such a configuration, it is possible to control the number of times the user can unlock using the unlocking electronic key information. For example, by setting the number of times of unlocking to one, it is possible to prevent the user from unlocking twice or more using one unlocking electronic key information, and to improve safety. sell.

  Further, in the electronic unlocking system according to the present invention, the unlocking electronic key information transmitted by the unlocking electronic key information transmitting unit includes an unlocking period, and the determination unit stores the result of accumulation by the accumulating unit. , The current date and time acquired by the date and time acquisition unit from the date and time of the first unlocking corresponding to the user identification information included in the unlocking electronic key information received by the unlocking electronic key information receiving unit When the unlocking period included in the unlocking electronic key information is exceeded, it may be determined that the unlocking electronic key information is not valid.

  With such a configuration, it is possible to control a period during which the user can unlock using the unlocking electronic key information. For example, if the distributor needs to make several round trips between the truck that carries the luggage and the house, such as when carrying the luggage, the unlocking period is set to 10 minutes. Thus, the unlocking using the unlocking electronic key information can be permitted for 10 minutes after the first unlocking. On the other hand, even in that case, if it exceeds 10 minutes, the unlocking using the unlocking electronic key information is not performed, so that the safety can be improved.

In the electronic unlocking system according to the present invention, the pre-encryption information acquisition unit may acquire the pre-encryption information by decrypting the encrypted information using the second encryption key information.
With this configuration, the pre-encryption information can be acquired by performing decryption using the second encryption key information.

In the electronic unlocking system according to the present invention, the pre-encryption information acquisition unit acquires a pre-encryption information candidate, encrypts the acquired pre-encryption information candidate using the second encryption key information, and When the encrypted information matches the encrypted information included in the unlocked electronic key information, pre-encryption information that is a candidate for the acquired pre-encryption information may be acquired.
With such a configuration, even if the encryption performed by the server is irreversible, pre-encryption information can be acquired using the second encryption key information in this way.

  According to the electronic unlocking system and the like according to the present invention, a third party can unlock the electric lock within a necessary range.

The block diagram which shows the structure of the electronic unlocking system by Embodiment 1 of this invention. The block diagram which shows the structure of the setting terminal by the embodiment The block diagram which shows the structure of the server by the embodiment The block diagram which shows the structure of the user terminal by the embodiment The block diagram which shows the structure of the electric lock terminal by the embodiment The flowchart which shows operation | movement of the setting terminal by the embodiment The flowchart which shows operation | movement of the server by the embodiment The flowchart which shows operation | movement of the user terminal by the embodiment The flowchart which shows the operation | movement of the electric lock terminal by the embodiment The flowchart which shows the operation | movement of the electric lock terminal by the embodiment The flowchart which shows the operation | movement of the electric lock terminal by the embodiment The figure which shows an example of the registration screen of the 1st encryption key information in the embodiment The figure which shows an example of the 1st encryption key information etc. in the embodiment The figure which shows an example of the setting screen of the unlocking in the embodiment The figure which shows an example of the address corresponding | compatible information in the embodiment The figure which shows an example of the accumulation result in the same embodiment The figure which shows an example of the accumulation result in the same embodiment The schematic diagram which shows an example of the external appearance of the computer system in the said embodiment The figure which shows an example of a structure of the computer system in the said embodiment.

  Hereinafter, the electronic unlocking system by this invention is demonstrated using embodiment. In the following embodiments, components and steps denoted by the same reference numerals are the same or equivalent, and repetitive description may be omitted.

(Embodiment 1)
An electronic unlocking system according to Embodiment 1 of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing a configuration of an electronic unlocking system 100 according to the present embodiment. In FIG. 1, an electronic unlocking system 100 according to the present embodiment includes a setting terminal 1, a server 2, a user terminal 3, and an electric lock terminal 4. The setting terminal 1 and the server 2 are communicably connected via a wired or wireless communication line 500, and the server 2 and the user terminal 3 are communicably connected via a wired or wireless communication line 500. . 1 shows the case where the line connecting the setting terminal 1 and the server 2 and the line connecting the server 2 and the user terminal 3 are the same, the lines may be different. Good. The communication line 500 is, for example, the Internet, an intranet, a public telephone line network, or the like.

  The setting terminal 1 is a terminal for setting unlocking, and may or may not be installed near the electric lock terminal 4. The server 2 generates unlocking electronic key information used for unlocking under the conditions set by the setting terminal 1, and transmits the unlocking electronic key information to the user terminal 3. The user terminal 3 is a user terminal that unlocks the electric lock 5, and receives unlocked electronic key information transmitted from the server 2. Then, the unlocking electronic key information is input to the electric lock terminal 4. As will be described later, the input may be the reading of the two-dimensional barcode shown in FIG. 1 or other methods. The electric lock terminal 4 controls the unlocking of the electric lock 5 of the door (not shown), and when receiving the proper unlocking electronic key information, unlocks the electric lock 5 and improper unlocking. When the electronic key information is accepted, the electric lock 5 is not unlocked. The electric lock 5 is a lock that can be electrically unlocked and locked, and various types of the electric lock 5 are already known, and thus the description thereof is omitted. Moreover, in this Embodiment, it is assumed that it is a house door that is unlocked and locked by the electric lock 5.

  FIG. 2 is a block diagram showing a configuration of the setting terminal 1 according to the present embodiment. In FIG. 2, the setting terminal 1 according to the present embodiment includes an unlocking date reception unit 11, a user identification information reception unit 12, a first encryption key information reception unit 13, an electric lock identification information storage unit 14, A setting transmission unit 15; The setting terminal 1 may be, for example, a personal computer in a house where the electric lock 5 is installed, a mobile phone or a PDA (Personal Digital Assistant) owned by a resident of the house.

  The unlocking date and time receiving unit 11 receives an input of the unlocking date and time that is the date and time when the electric lock 5 is unlocked. The unlocking date / time may be a pinpoint date / time indicating a specific time point (for example, “March 10, 2009 22:15” or the like), or a time indicating a range ( For example, “March 10, 2009, 22:15 to 2009, March 10, 22:30”, “March 10, 2009, 22:00” may be used.

  The user identification information receiving unit 12 receives user identification information for identifying a user who performs unlocking. As long as this user identification information can identify a user as a result, the content of the information is not ask | required. For example, the user identification information may be information for identifying the user himself / herself (for example, the user's name, the user's employee number, member number, etc.), and information for identifying the device corresponding to the user. (For example, the user's mobile phone number, the user's e-mail address, etc.).

  The first encryption key information receiving unit 13 receives first encryption key information. The first encryption key information is information used for encryption in the server 2 as will be described later.

  In addition, each reception in the unlocking date reception part 11, the user identification information reception part 12, and the 1st encryption key information reception part 13 is information input from input devices (for example, a keyboard, a mouse, a touch panel etc.), for example. May be received, information transmitted via a wired or wireless communication line may be received, and information read from a predetermined recording medium (for example, an optical disk, a magnetic disk, or a semiconductor memory) may be received. In the present embodiment, it is assumed that the acceptance is from the input device. Note that each of the unlocking date reception unit 11, the user identification information reception unit 12, and the first encryption key information reception unit 13 may include a device (for example, a modem or a network card) for reception, or It does not have to be included. In addition, each of the unlocking date reception unit 11, the user identification information reception unit 12, and the first encryption key information reception unit 13 may be realized by hardware, or by software such as a driver that drives a predetermined device. It may be realized. Each of the unlocking date reception unit 11, the user identification information reception unit 12, and the first encryption key information reception unit 13 may temporarily store the received information in a recording medium (not shown).

  The electric lock identification information storage unit 14 stores electric lock identification information, which is information for identifying the electric lock 5 for which unlocking is set by the setting device 1. If this electric lock identification information can identify an electric lock as a result, the content of the information will not ask | require. For example, the electric lock identification information may be information for identifying the electric lock 5 itself (for example, a device number unique to the electric lock 5 such as a manufacturing number of the electric lock). It may be information for identifying, or information for identifying a house where the electric lock 5 is provided (for example, a telephone number or an address of the house).

  In addition, the process in which electric lock identification information is memorize | stored in the electric lock identification information storage part 14 does not ask | require. For example, the electric lock identification information may be stored in the electric lock identification information storage unit 14 via a recording medium, and the electric lock identification information transmitted via a communication line or the like is stored in the electric lock identification information storage unit. 14 may be stored, or the electric lock identification information input via the input device may be stored in the electric lock identification information storage unit 14. The storage in the electric lock identification information storage unit 14 may be temporary storage in a RAM or the like, or may be long-term storage. The electric lock identification information storage unit 14 can be realized by a predetermined recording medium (for example, a semiconductor memory, a magnetic disk, an optical disk, etc.).

  The setting transmission unit 15 includes an unlocking date / time received by the unlocking date / time receiving unit 11, user identification information received by the user identification information receiving unit 12, and an electric lock stored in the electric lock identification information storage unit 14. The identification information is transmitted to the server 2. Since these pieces of information are transmitted for setting unlocking, it is preferable that each piece of information is transmitted in a linked state. However, if each information is transmitted in a linked state, the setting transmission unit 15 may transmit the information all at once or separately.

  In addition, the setting transmission unit 15 stores the first encryption key information received by the first encryption key information reception unit 13 in the server 2 in the first lock key information and the electric lock identification information storage unit 14. The electric lock identification information that has been set may be transmitted to the server 2. This transmission may be performed only once before setting of unlocking by the setting terminal 1. If the first encryption key information is changed, this transmission may be performed again. Since these pieces of information are transmitted for registration in the server 2, it is preferable that the pieces of information are transmitted in a linked state. However, if each information is transmitted in a linked state, the setting transmission unit 15 may transmit the information all at once or separately.

  In addition, the setting transmission part 15 may transmit unlocking date etc. directly to the server 2, or may transmit indirectly via another server. In addition, the setting transmission unit 15 may or may not include a transmission device (for example, a modem or a network card) for performing transmission. The setting transmission unit 15 may be realized by hardware, or may be realized by software such as a driver that drives the transmission device. Moreover, the setting transmission part 15 may hold | maintain the address of the server 2 previously, or may receive the address of the server 2 from another component before transmitting information to the server 2. When the setting terminal 1 receives information other than the above description, the setting transmission unit 15 may also transmit the received information to the server 2. Examples of information other than the above description include the number of times of unlocking and the unlocking period described later.

  FIG. 3 is a block diagram showing a configuration of the server 2 according to the present embodiment. 3, the server 2 according to the present embodiment includes a first encryption key information storage unit 21, a setting reception unit 22, an encryption unit 23, an address correspondence information storage unit 24, and an unlocked electronic key information transmission unit. 25.

  The first encryption key information storage unit 21 stores first encryption key information. In the present embodiment, it is assumed that the first encryption key information storage unit 21 stores the first encryption key information and the electric lock identification information in association with each other. The first encryption key information and the electric lock identification information are received and stored by the setting receiving unit 22. The storage in the first encryption key information storage unit 21 may be temporary storage in a RAM or the like, or may be long-term storage. The first encryption key information storage unit 21 can be realized by a predetermined recording medium (for example, a semiconductor memory, a magnetic disk, an optical disk, etc.).

  The setting receiving unit 22 receives the first encryption key information and the electric lock identification information transmitted by the setting transmission unit 15 of the setting terminal 1 and stores the information in the first encryption key information storage unit 21 in association with each other. . In addition, the setting receiving unit 22 receives the unlocking date and time, user identification information, and electric lock identification information transmitted by the setting transmission unit 15 of the setting terminal 1.

  The setting receiving unit 22 may receive information other than these. For example, the number of times of unlocking to be described later and the unlocking period may also be received. The setting receiving unit 22 may or may not include a wired or wireless receiving device (for example, a modem or a network card) for receiving. The setting receiving unit 22 may be realized by hardware, or may be realized by software such as a driver that drives the receiving device.

  The encryption unit 23 uses the first encryption key information stored in the first encryption key information storage unit 21 to at least encrypt the unlock date / time received by the setting reception unit 22. More specifically, the encryption unit 23 stores the first encryption key information in the electric lock identification information when the setting reception unit 22 receives the unlocking date and time, the user identification information, and the electric lock identification information. The unlock date / time may be encrypted at least using the first encryption key information associated with the unit 21. Also, the encryption unit 23, when the unlocking electronic key information transmitted by the unlocking electronic key information transmitting unit 25 described later includes information other than the encrypted unlocking date and time, information other than the unlocking date and time May be encrypted. As information other than the unlocking date and time, for example, there are the number of times of unlocking described later, the unlocking period, user identification information, and the like. When information other than the unlocking date / time is also encrypted, the encryption unit 23 may encrypt the information together with the unlocking date / time, or may encrypt them separately. The encryption unit 23 encrypts the information to be encrypted using the first encryption key information, and then encrypts the information, or the encrypted information and the unencrypted information. May be converted into information (for example, a two-dimensional barcode) in which a person cannot directly know the content of the information.

  The address correspondence information storage unit 24 stores address correspondence information. The address correspondence information is information that associates the user identification information with the address of the transmission destination of the unlocked electronic key information corresponding to the user identified by the user identification information. The address may be, for example, an e-mail address, an IP address, or another address. Note that the process of storing the address correspondence information in the address correspondence information storage unit 24 does not matter. For example, the address correspondence information may be stored in the address correspondence information storage unit 24 via a recording medium, and the address correspondence information transmitted via a communication line or the like is stored in the address correspondence information storage unit 24. Alternatively, the address correspondence information input via the input device may be stored in the address correspondence information storage unit 24. The storage in the address correspondence information storage unit 24 may be temporary storage in a RAM or the like, or may be long-term storage. The address correspondence information storage unit 24 can be realized by a predetermined recording medium (for example, a semiconductor memory, a magnetic disk, an optical disk, etc.).

  Here, “associating user identification information with an address” means that it is only necessary to obtain an address from the user identification information. Accordingly, the correspondence information may include information including the user identification information and the address as a set, or may be information that links the user identification information and the address. In the latter case, the correspondence information may be, for example, information that associates the user identification information with a pointer or address indicating the position where the address is stored. In the present embodiment, the former case will be described. Further, the user identification information and the address may not be directly associated with each other. For example, the third information may correspond to the user identification information, and the address may correspond to the third information.

  The unlocking electronic key information transmitting unit 25 transmits the unlocking electronic key information including at least the unlocking date and time encrypted by the encrypting unit 23 to the transmission destination corresponding to the user identification information received by the setting receiving unit 22. . In the present embodiment, transmitting to a destination corresponding to the user identification information means transmitting an address associated with the user identification information by the address correspondence information stored in the address correspondence information storage unit 24. Send it first. The address corresponds to the user terminal 3, and the transmitted unlocking electronic key information is received by the user terminal 3. The unlocked electronic key information to be transmitted may be graphic information such as the two-dimensional barcode shown in FIG. 1, may be a number, symbol, character string, or other information. There may be.

  The unlocking electronic key information transmitted by the unlocking electronic key information transmitting unit 25 may include user identification information corresponding to the transmission destination of the unlocking electronic key information. In the present embodiment, a case will be described in which user identification information is also included in unlocked electronic key information. Further, the unlocking electronic key information transmitted by the unlocking electronic key information transmitting unit 25 may include the number of times of unlocking indicating the number of times that unlocking is possible. Moreover, the unlocking electronic key information transmitted by the unlocking electronic key information transmitting unit 25 may include an unlocking period indicating a period during which unlocking is possible after the unlocking. The number of times of unlocking and the unlocking period may be determined in advance. In that case, the number of times of unlocking and the unlocking period may be the same for all users and all electric locks, may be the same for each setter, and are the same for each electric lock. It may be a thing. In addition, when setting from the setting terminal 1, the number of times of unlocking and the unlocking period may be set. In this case, the setting transmission unit 15 transmits the number of times of unlocking and the unlocking period, and the setting receiving unit 22 also receives the number of times of unlocking and the unlocking period. The number of times and the unlocking period are included in the unlocking electronic key information. In this case, the setting terminal 1 may accept the number of times of unlocking and the unlocking period.

  In the unlocking electronic key information, information other than the unlocking date may be encrypted, or may not be encrypted. However, when it is not desired to be tampered with by a user or the like, it is preferable that the data is encrypted. Therefore, in general, it is preferable that the number of times of unlocking other than the unlocking date, the unlocking period, and the user identification information are also encrypted.

  Note that the unlocking electronic key information transmitting unit 25 may directly transmit the unlocking electronic key information to the user terminal 3, or may indirectly transmit the unlocking electronic key information via a server or the like. Moreover, the unlocking electronic key information transmission unit 25 may or may not include a transmission device (for example, a modem or a network card) for performing transmission. The unlocking electronic key information transmission unit 25 may be realized by hardware, or may be realized by software such as a driver that drives the transmission device.

  Here, the first encryption key information and second encryption key information described later will be described. The first encryption key information is information used for encryption in the server 2. The second encryption key information is information corresponding to the first encryption key information, and is information used to acquire information before encryption corresponding to the encrypted information included in the unlocking electronic key information. . This encryption is done for the purpose of preventing the information subject to encryption, such as the unlocking date, from being tampered with by users, etc. Information that cannot be converted, for example, conversion into a one-dimensional or two-dimensional barcode, or other encryption may be used. There are reversible and irreversible encryption methods. Reversible means that the encrypted information can be decrypted with the second encryption key information. On the other hand, the irreversible means that the encrypted information cannot be decrypted with the second encrypted information. These will be briefly described.

  The reversible encryption is generally used in the world of communication and the like, and for example, a common key method and a public key method are known. For example, when the encryption is performed by a common key method, the first encryption key information and the second encryption key information may be the same information. When the encryption is performed by a public key method, the first encryption key information is a public key, and the second encryption key information is information encrypted by the first encryption key information that is the public key. It may be a secret key for decrypting. Further, when the encryption is to convert information into a barcode, for example, the first encryption key information is a conversion algorithm used when converting information into a barcode, and the second encryption key information is The conversion algorithm used when converting the barcode converted by the conversion algorithm into the original information may be used.

  In the case of irreversible encryption, that is, encryption that cannot decrypt the encrypted information, the first encryption key information and the second encryption key information may be the same algorithm that performs encryption, It may be information (encryption key) used for the encryption. Then, a candidate for information before encryption is predicted, the predicted candidate is encrypted using the second encryption key information, and the encrypted information is encrypted with the first encryption key information. When they match, it can be known that the predicted information candidate before encryption is the information before encryption. The algorithm used in the encryption may be, for example, a method for generating a hash of information, or another algorithm.

  Also, encryption may be performed in two or more stages. For example, first, the unlocking date and time is encrypted by a common key method or a public key method, the encrypted unlocking date and time, the unencrypted user identification information, the number of times of unlocking, the unlocking period, etc. May be converted into a two-dimensional barcode. In such a case, the first encryption key information and the second encryption key information may be a set of a plurality of encryption key information. It goes without saying that various encryption methods and methods for obtaining pre-encryption information from the encrypted information are already known and may be used.

  The first encryption key information storage unit 21 and the address correspondence information storage unit 24 may be realized by the same recording medium or may be realized by separate recording media. In the former case, the area storing the first encryption key information is the first encryption key information storage unit 21, and the area storing the address correspondence information is the address correspondence information storage unit 24.

  FIG. 4 is a block diagram showing the configuration of the user terminal 3 according to the present embodiment. In FIG. 4, the user terminal 3 according to the present embodiment includes an unlocking electronic key information receiving unit 31, an unlocking electronic key information storage unit 32, and an unlocking electronic key information output unit 33. This user terminal 3 may be, for example, a mobile phone or a PDA possessed by the user. The user terminal 3 is preferably portable up to the electric lock terminal 4. This is because the unlocking electronic key information output by the user terminal 3 can be input to the electric lock terminal 4.

  In the unlocking electronic key information receiving unit 31, the unlocking electronic key information transmitting unit 25 of the server 2 receives the transmission unlocking electronic key information. Note that the unlocking electronic key information receiving unit 31 may or may not include a wired or wireless receiving device (for example, a modem or a network card) for receiving. The unlocking electronic key information receiving unit 31 may be realized by hardware, or may be realized by software such as a driver that drives the receiving device.

  The unlocking electronic key information storage unit 32 stores the unlocking electronic key information received by the unlocking electronic key information receiving unit 31 in a recording medium. The recording medium is, for example, a semiconductor memory, an optical disk, a magnetic disk, or the like, and may be included in the unlocking electronic key information storage unit 32 or may exist outside the unlocking electronic key information storage unit 32. Also good. Further, this recording medium may or may not temporarily store unlocked electronic key information.

  The unlocking electronic key information output unit 33 outputs the unlocking electronic key information stored in the unlocking electronic key information storage unit 32. Here, the output may be, for example, display on a display device (for example, a CRT or a liquid crystal display), transmission via a communication line to a predetermined device, printing by a printer, or audio output by a speaker. But you can. Note that the unlocking electronic key information output unit 33 may or may not include an output device (for example, a display device or a printer). The unlocking electronic key information output unit 33 may be realized by hardware, or may be realized by software such as a driver that drives these devices.

  FIG. 5 is a block diagram showing a configuration of the electric lock terminal 4 according to the present embodiment. 5, the electric lock terminal 4 according to the present embodiment includes a second encryption key information receiving unit 41, a second encryption key information storage unit 42, an unlocking electronic key information receiving unit 43, and a date and time acquisition unit 44. The pre-encryption information acquisition unit 45, the determination unit 46, the storage unit 47, and the unlocking unit 48 are provided. The electric lock terminal 4 may be installed in the vicinity of the electric lock 5 or may be configured integrally with the electric lock 5. As shown in FIG. 1, the electric lock terminal 4 is a stand-alone device that is basically not connected to the communication line 500. However, as will be described later, when information is received from the user terminal 3 or when the second encryption key information is received, infrared communication, near field communication, or the like may be performed.

  The second encryption key information receiving unit 41 receives second encryption key information. Then, the second encryption key information receiving unit 41 stores the received second encryption key information in a second encryption key information storage unit 42 described later. As described above, the second encryption key information is information corresponding to the first encryption key information, and is encrypted information included in the unlocking electronic key information received by the unlocking electronic key information receiving unit 43 described later. This information is used to acquire information before encryption corresponding to.

  Note that the second encryption key information receiving unit 41 may receive, for example, second encryption key information input from an input device (for example, a numeric keypad, other keyboard, touch panel, etc.), such as Bluetooth (registered trademark) or RF. The second encryption key information may be received via short-range wireless communication using a tag or the like, or the second encryption key information may be received via infrared communication, and a predetermined recording medium (for example, a semiconductor memory) Etc.) may be received. In addition, the second encryption key information receiving unit 41 may or may not include a device (for example, a modem or a network card) for receiving. The second encryption key information receiving unit 41 may be realized by hardware, or may be realized by software such as a driver that drives a predetermined device.

  The second encryption key information storage unit 42 stores second encryption key information. The second encryption key information is received by the second encryption key information receiving unit 41. The storage in the second encryption key information storage unit 42 may be temporary storage in a RAM or the like, or may be long-term storage. The second encryption key information storage unit 42 can be realized by a predetermined recording medium (for example, a semiconductor memory, a magnetic disk, an optical disk, etc.).

  The unlocking electronic key information receiving unit 43 receives the unlocking electronic key information. This unlocking electronic key information is output by the unlocking electronic key information output unit 33 of the user terminal 3. The unlocking electronic key information accepting unit 43 may directly accept the unlocking electronic key information output by the unlocking electronic key information output unit 33 or may accept it indirectly. In the former case, the unlocking electronic key information receiving unit 43 may capture the unlocking electronic key information such as a two-dimensional barcode displayed on a display or the like with a camera, for example, short-range wireless communication or infrared The unlocked electronic key information transmitted by communication may be received, or the sound of the unlocked electronic key information output from a speaker or the like may be collected by a microphone. In the latter case, the unlocking electronic key information receiving unit 43 may receive the unlocking electronic key information input from the input device (for example, a numeric keypad, other keyboard, touch panel, etc.) by the user, The unlocked electronic key information such as a two-dimensional barcode printed on paper may be photographed with a camera, and the unlocked electronic key information stored in a recording medium such as a USB memory may be read from the recording medium. . It goes without saying that the method of accepting unlocked electronic key information is not limited to these.

  Note that the unlocking electronic key information receiving unit 43 may or may not include a device (for example, a camera or a communication device) for receiving. Further, the unlocking electronic key information receiving unit 43 may be realized by hardware, or may be realized by software such as a driver that drives a predetermined device.

  The date acquisition unit 44 acquires the current date. The date and time acquisition unit 44, for example, from a calendar unit (not shown) that manages the current date, and a timekeeping unit (not shown) that manages the current time, You may acquire time. The timekeeping unit or the like may be a radio timepiece that manages accurate time. Note that the date and time acquired by the date and time acquisition unit 44 may be information within a range necessary for use in determination by the determination unit 46 described later. For example, regarding the date, if the determination unit 46 makes a determination using “day” (for example, 10th, 23rd, etc.), the date acquisition unit 44 may acquire “day”. If the determination using 46 “date of month” (for example, March 15, 2009) is performed, the date acquisition unit 44 may acquire “date of month”. Further, for example, if the determination unit 46 makes a determination using “hours and minutes” (for example, 9:50), the date and time acquisition unit 44 acquires “hours and minutes”. If the determination unit 46 makes a determination using “hour” (for example, 10:00), the date and time acquisition unit 44 may acquire “hour”.

  The pre-encryption information acquisition unit 45 uses the second encryption key information stored in the second encryption key information storage unit 42 to use the encryption included in the unlocking electronic key information received by the unlocking electronic key information receiving unit 43. The pre-encryption information that is the pre-encrypted information corresponding to the encrypted information is acquired. As described above, the acquisition of the pre-encryption information is a decryption process for acquiring the pre-encryption information by decrypting the encrypted information using the second encryption key information in the case of reversible encryption. In the case of irreversible encryption, a candidate for pre-encryption information is acquired, the acquired candidate for pre-encryption information is encrypted using the second encryption key information, and the encrypted information is unlocked. When the information matches the encrypted information included in the electronic key information, the pre-encryption information that is a candidate for the acquired pre-encryption information may be acquired. Acquisition of candidates for pre-encryption information in the latter case is performed, for example, as follows. Since the pre-encryption information includes the unlock date / time, the pre-encryption information acquisition unit 45 acquires a pre-encryption information candidate according to a predetermined date / time from the current date / time acquired by the date / time acquisition unit 44. May be encrypted using the second encryption key information. When information other than the unlock date / time is included in the pre-encryption information, the pre-encryption information acquisition unit 45 may acquire the pre-encryption information candidates using the information as well. For example, when any number of times of unlocking 1 to 10 is included, the pre-encryption information may be acquired by acquiring candidates of pre-encryption information corresponding to each unlocking number. It is assumed that information other than the unlock date / time is encrypted in advance. In addition, it is preferable that the unit for setting the unlocking date and time (for example, whether it can be set in units of 1 minute or in units of 15 minutes) is set in advance. This is because candidates for pre-encryption information are acquired within a necessary and sufficient range. Further, the pre-encryption information acquired by the pre-encryption information acquisition unit 45 may be temporarily stored in a recording medium (not shown).

  The determination unit 46 uses at least the current date and time acquired by the date and time acquisition unit 44 and the acquisition result by the pre-encryption information acquisition unit 45 to verify that the unlocked electronic key information received by the unlocked electronic key information reception unit 43 is valid. It is judged whether it is something. For example, the determination unit 46 determines whether or not the unlocking date and time included in the pre-encryption information acquired by the pre-encryption information acquisition unit 45 is substantially equal to the current date and time acquired by the date and time acquisition unit 44. If it is equal to, the judgment of the unlocking date and the current date is judged to be valid, and if not, the judgment of the unlocking date and the current date is judged not valid. May be. It should be noted that “substantially equal” may be a case where they are exactly the same, or may include a case where the difference between them is within a predetermined range. For example, when the unlocking date and time is the date and time, if the unlocking date and time match the current date and time, it is determined that they are exactly the same. On the other hand, if the difference between the two is within a predetermined range such as 10 minutes or 30 minutes, the difference between the two may be within a predetermined range and may be determined to be substantially equal. Further, for example, when the unlocking date / time is a time having a range of the year / month / day, if the current date / time is included in the unlocking date / time, it is determined that they are exactly the same. On the other hand, the current date / time is not included in the unlocking date / time, but if the difference between the start / end of the unlocking date / time and the current date / time is shorter, it is within a predetermined range such as 10 minutes or 30 minutes. For example, it may be determined that the difference between the two is within a predetermined range and substantially equal.

  Needless to say, the determination using the acquisition result by the pre-encryption information acquisition unit 45 is not limited to the determination using the pre-encryption information. For example, the determination unit 46 may determine that the unlocked electronic key information is not valid by using the acquisition result that the pre-encryption information acquisition unit 45 could not acquire the pre-encryption information.

  Moreover, the determination part 46 may perform the determination using information other than the unlocking date information. For example, when the unlocking electronic key information includes a unique number of the electric lock 5 (for example, the above-described electric lock identification information may be included), the determination unit 46 is a recording medium (not shown). And the number included in the unlocking electronic key information (if encrypted, before encryption, acquired by the pre-encryption information acquisition unit 45) If the two numbers match, it is determined that the number is valid. If not, the number is not valid. Good.

  Further, the determination unit 46 may make a determination using information stored in the storage unit 47 described later. In the present embodiment, as will be described later, the storage unit 47 acquires the user identification information included in the unlocking electronic key information and the date and time acquisition unit 44 when the unlocking electronic key information is received. The date and time and the determination result by the determination unit 46 corresponding to the unlocked electronic key information are stored in association with each other. That is, history information indicating whether the electronic lock terminal 4 has received the unlocked electronic key information and whether the unlocked electronic key information has been unlocked is stored.

  In such a situation, the determination unit 46 refers to the accumulation result by the accumulation unit 47, for example, and unlocks according to the number of times of unlocking included in the unlocking electronic key information received by the unlocking electronic key information receiving unit 43. However, when it has already been performed corresponding to the user identification information included in the unlocking electronic key information, it may be determined that the unlocking electronic key information is not valid. In this case, it is assumed that the unlocking electronic key information includes the number of times of unlocking. “Unlocking according to the number of times of unlocking has already been performed corresponding to the user identification information” means that the number of times of unlocking corresponding to the user identification information is equal to or exceeds the number of times of unlocking. (But never exceed unless some error occurs). The number of times of unlocking corresponding to the user identification information is the number of times of unlocking using the unlocking electronic key information including the user identification information. The number of times of unlocking may be the number of times of unlocking in all past histories corresponding to the user identification information, or the number of times of unlocking corresponding to the same unlocking electronic key information. There may be. In the former case, the upper limit number of unlocks is set for each user. In the latter case, the unlocking upper limit number is set for one unlocking electronic key information. In the case of the latter, information for identifying the unlocking electronic key information is stored in association with the user identification information so that it can be known whether the unlocking electronic key information is the same. And using the information for identifying the unlocking electronic key information, the determination may be made using the stored result corresponding to the received unlocking electronic key information. If there is no frequent unlocking using, even if a judgment is made using only the accumulated result within a predetermined range from the current date and time (for example, within 3 hours, within 1 day, etc.) Good.

  For example, the determination unit 46 refers to the accumulation result by the accumulation unit 47, and the current date and time acquired by the date and time acquisition unit 44 is included in the unlocking electronic key information received by the unlocking electronic key information reception unit 43. When the unlocking period included in the unlocking electronic key information has passed since the first date of unlocking corresponding to the user identification information, it is determined that the unlocking electronic key information is not valid. Also good. In this case, it is assumed that the unlocking period is included in the unlocking electronic key information. The first date and time when unlocking is performed corresponding to the user identification information is the first date and time when unlocking is performed using the unlocking electronic key information including the user identification information. The date and time of the first unlocking may be the date and time of the first unlocking in all past histories corresponding to the user identification information, or the first unlocking date and time corresponding to the same unlocking electronic key information. May be the date and time of unlocking. In the former case, the upper limit of the unlockable period is set for each user. In the latter case, the upper limit of the unlockable period is set for one unlocked electronic key information. In the case of the latter, information for identifying the unlocking electronic key information is stored in association with the user identification information so that it can be known whether the unlocking electronic key information is the same. And using the information for identifying the unlocking electronic key information, the determination may be made using the stored result corresponding to the received unlocking electronic key information. If there is no frequent unlocking using, even if a judgment is made using only the accumulated result within a predetermined range from the current date and time (for example, within 3 hours, within 1 day, etc.) Good.

  If the determination unit 46 makes a determination using the unlocking date and time or other information for one unlocked electronic key information, if it is determined that the determination is not valid, Therefore, it is determined that the unlocked electronic key information is not valid. On the other hand, if it is determined that all the determinations are valid, it is finally determined that the unlocked electronic key information is valid.

  Further, in the case of irreversible encryption, it is accepted using the pre-encryption information candidate including the unlocking date and time substantially the same as the current date and time acquired by the date and time acquisition unit 44 and the second encryption key information. When the same information as the unlocked electronic key information can be acquired, the determination unit 46 may determine that the unlocked electronic key information is valid. At this time, as described above, the candidate for the pre-encryption information may include information other than the unlocking date and time. As described above, the determination unit 46 may determine whether the unlocked electronic key information is valid by indirectly using the current date and time. That is, the current date and time used by the determination unit 46 for determination may be used directly or indirectly.

  Further, even in the case of irreversible encryption, the candidate for pre-encryption information including the unlocking date and time exceeding the range substantially equal to the current date and time acquired by the date and time acquisition unit 44, and the second encryption key information The pre-encryption information acquisition unit 45 acquires pre-encryption information by acquiring the same information as the received unlocking electronic key information, and the determination unit 46 uses the acquired pre-encryption information, A determination process similar to the case of reversible encryption may be performed.

  The storage unit 47 includes the user identification information included in the unlocking electronic key information, the date and time acquired by the date and time acquisition unit 44 when the unlocking electronic key information is received, and the unlocking electronic key information. The determination result by the corresponding determination unit 46 is associated and stored in the recording medium. The recording medium is, for example, a semiconductor memory, an optical disk, a magnetic disk, or the like, and may be included in the storage unit 47 or may exist outside the storage unit 47. Further, this recording medium may or may not store information temporarily. In the present embodiment, the case where the storage unit 47 also stores the determination result will be described. However, the storage unit 47 may not store the determination result. Further, as described above, the storage unit 47 may store information identifying the unlocked electronic key information in association with the user identification information or the like. The information for identifying the unlocking electronic key information may be, for example, the unlocking date / time included in the unlocking electronic key information (however, the decrypted electronic key information). It may be a hash value or information that can identify other unlocked electronic key information. By accumulating information by the accumulating unit 47, it becomes possible to know afterward who has performed the act of unlocking and, as a result, whether it has been unlocked. Therefore, the electric lock terminal 4 may include an output unit (not shown) that outputs the information stored in the storage unit 47. The output may be, for example, display on a display device, transmission via a communication line to a predetermined device, printing by a printer, audio output by a speaker, accumulation on a recording medium, and the like. It may be handed over to the components. The output unit (not shown) may or may not include an output device (for example, a display device or a printer). The output unit (not shown) may be realized by hardware, or may be realized by software such as a driver that drives these devices. In addition, when the recording medium in which the storage unit 47 stores information is detachable, the recording medium is stored in the recording medium by removing the recording medium from the electric lock terminal 4 and attaching it to other devices. Information may be used. In addition, in order to be able to know who is the user corresponding to the stored user identification information, the server 2 or the like uses the user identification information and information for identifying the user (for example, use (Name, telephone number, address, etc.) may be stored in association with each other.

  The unlocking unit 48 unlocks the electric lock 5 when the determining unit 46 determines that the unlocking electronic key information received by the unlocking electronic key information receiving unit 43 is valid. The unlocking unit 48 does not unlock the electric lock 5 when the determining unit 46 determines that the unlocking electronic key information is not valid. That is, unlocking is performed only when the user inputs valid unlocking electronic key information, and for example, the user can open the door.

  The second encryption key information storage unit 42 and the recording medium on which the storage unit 47 stores information may be realized by the same recording medium or may be realized by separate recording media. In the former case, the area storing the second encryption key information becomes the second encryption key information storage unit 42, and the area storing the information stored by the storage unit 47 stores the information by the storage unit 47. It becomes a recording medium.

  Next, operation | movement of each apparatus of the electronic unlocking system 100 by this Embodiment is demonstrated using a flowchart. FIG. 6 is a flowchart showing the operation of the setting terminal 1 according to the present embodiment.

  (Step S101) The first encryption key information receiving unit 13 determines whether or not the first encryption key information has been received. If the first encryption key information is received, the process proceeds to step S102, and if not, the process proceeds to step S103.

  (Step S <b> 102) The setting transmission unit 15 reads out the electric lock identification information stored in the electric lock identification information storage unit 14, and the first encryption key information received by the first encryption key information reception unit 13. Key information is transmitted to the server 2. Then, the process returns to step S101.

  (Step S103) The unlocking date reception unit 11 determines whether the unlocking date has been received. And when unlocking date is received, it progresses to step S104, and when that is not right, it progresses to step S105.

  (Step S104) The unlocking date reception unit 11 temporarily stores the received unlocking date on a recording medium (not shown). Then, the process returns to step S101.

  (Step S105) The user identification information receiving unit 12 determines whether user identification information has been received. If user identification information is received, the process proceeds to step S106, and if not, the process proceeds to step S107.

  (Step S106) The user identification information receiving unit 12 temporarily stores the received user identification information on a recording medium (not shown). Then, the process returns to step S101.

  (Step S107) The setting transmission unit 15 determines whether or not to transmit the unlocking date and time, the user identification information, and the electric lock identification information. And when transmitting unlocking date etc., it progresses to step S108, and when that is not right, it returns to step S101. The setting transmission unit 15 determines to transmit the unlocking date / time when both the unlocking date / time and the user identification information are temporarily stored, for example. It may be determined that the date and time are not transmitted.

  (Step S108) The setting transmission unit 15 reads the unlocking date and time and the user identification information temporarily stored, reads the electric lock identification information stored in the electric lock identification information storage unit 14, Those pieces of information are transmitted to the server 2. Then, the process returns to step S101. In addition, after transmitting unlocking date etc. to the server 2, the unlocking date and time and user identification information which were temporarily memorize | stored may be deleted.

  In the flowchart of FIG. 6, the process ends when the power is turned off or the process ends. Moreover, although the case where unlocking date and time and user identification information are received separately was demonstrated in the flowchart of FIG. 6, both information may be received collectively.

  In addition, when the number of times of unlocking and the unlocking period are also transmitted to the server 2, such information is also received by a receiving unit (not shown) and transmitted to the server 2 by the setting transmitting unit 15 together with the unlocking date and time. Alternatively, the number of times of unlocking and the unlocking period stored in advance in a recording medium (not shown) may be read and transmitted to the server 2 by the setting transmission unit 15 together with the unlocking date and time.

FIG. 7 is a flowchart showing the operation of the server 2 according to this embodiment.
(Step S201) The setting receiving unit 22 determines whether the first encryption key information and the electric lock identification information have been received. And when both information is received, it progresses to step S202, and when that is not right, it progresses to step S203.

  (Step S202) The setting receiving unit 22 associates the received first encryption key information with the electric lock identification information and stores them in the first encryption key information storage unit 21. Then, the process returns to step S201.

  (Step S203) The setting receiving unit 22 determines whether the unlocking date and time, the user identification information, and the electric lock identification information have been received. If it has been received, the process proceeds to step S204; otherwise, the process returns to step S201.

  (Step S <b> 204) The encryption unit 23 reads the first encryption key information corresponding to the electric lock identification information received by the setting reception unit 22 from the first encryption key information storage unit 21.

  (Step S205) The encryption unit 23 encrypts at least the unlocking date and time using the first encryption key information read in step S204. When the setting receiving unit 22 receives the number of times of unlocking and the unlocking period, the encrypting unit 23 may or may not encrypt the information. The encryption unit 23 may or may not encrypt the user identification information.

  (Step S <b> 206) The unlocking electronic key information transmitting unit 25 reads the address corresponding to the user identification information received by the setting receiving unit 22 using the address correspondence information stored in the address correspondence information storage unit 24.

  (Step S207) The unlocking electronic key information transmission unit 25 transmits the unlocking electronic key information including the information encrypted by the encryption unit 23 with the address read in step S206 as the transmission destination. The unlocking electronic key information includes at least the encrypted unlocking date / time. In addition to the encrypted unlocking date and time, the unlocking frequency and unlocking period may be included in the unlocking electronic key information, and the user identification information may be included in the unlocking electronic key information. Of course, other information may be included. The number of times of unlocking and the unlocking period may be those received from the setting terminal 1, or may be stored in advance on a recording medium (not shown) of the server 2. The user identification information is received from the setting terminal 1. The number of times of unlocking, the unlocking period, user identification information, etc. may be encrypted or may not be encrypted. Then, the process returns to step S201.

When transmitting the unlocking electronic key information, the unlocking electronic key information transmitting unit 25 may or may not transmit information other than the unlocking electronic key information. In the former case, for example, unencrypted unlock date / time and information corresponding to the electric lock identification information may be transmitted together with the unlock electronic key information. The information corresponding to the electric lock identification information may be, for example, the name of the resident of the house where the electric lock identified by the electric lock identification information is installed, or the telephone number of the house It may be other information. When information corresponding to the electric lock identification information is also transmitted, correspondence information that associates the electric lock identification information with information corresponding to the electric lock identification information is stored in the server 2, and the correspondence information is used. Information corresponding to the electric lock identification information acquired in this manner may be transmitted.
In the flowchart of FIG. 7, the process ends when the power is turned off or the process ends.

FIG. 8 is a flowchart showing the operation of the user terminal 3 according to the present embodiment.
(Step S301) The unlocking electronic key information receiving unit 31 determines whether or not the unlocking electronic key information has been received. If the unlocking electronic key information is received, the process proceeds to step S302. If not, the process proceeds to step S303.

  (Step S302) The unlocking electronic key information storage unit 32 stores the unlocking electronic key information received by the unlocking electronic key information receiving unit 31 in a recording medium. Then, the process returns to step S301.

  (Step S303) The unlocking electronic key information output unit 33 determines whether to output the accumulated unlocking electronic key information. And when outputting, it progresses to step S304, and when that is not right, it returns to step S301. For example, when the user terminal 3 receives an instruction to output unlocking electronic key information, the unlocking electronic key information output unit 33 may determine to output the unlocking electronic key information. . Further, when two or more unlocking electronic key information is accumulated, the user terminal 3 may also accept information specifying the unlocking electronic key information to be output.

(Step S304) The unlocking electronic key information output unit 33 outputs the unlocking electronic key information stored in the unlocking electronic key information storage unit 32. As described above, when two or more unlocking electronic key information is accumulated and the user terminal 3 also receives information specifying the unlocking electronic key information to be output, the unlocking electronic key information is received. The key information output unit 33 may output the unlocked electronic key information specified as described above. Then, the process returns to step S301.
In the flowchart of FIG. 8, the process ends when the power is turned off or the process is terminated.

FIG. 9 is a flowchart showing the operation of the electric lock terminal 4 according to the present embodiment.
(Step S401) The second encryption key information receiving unit 41 determines whether or not the second encryption key information has been received. If the second encryption key information is accepted, the process proceeds to step S402. If not, the process proceeds to step S403.

  (Step S402) The second encryption key information receiving unit 41 accumulates the second encryption key information received in Step S401 in the second encryption key information storage unit. Then, the process returns to step S401.

  (Step S403) The unlocking electronic key information receiving unit 43 determines whether unlocking electronic key information has been received. If the unlocking electronic key information is accepted, the process proceeds to step S404, and if not, the process returns to step S401.

  (Step S404) The determination unit 46 and the like perform processing for determining whether or not the unlocking electronic key information received by the unlocking electronic key information receiving unit 43 is valid. Details of this processing will be described later with reference to the flowcharts of FIGS. 10 and 11 for a case where encryption is reversible and a case where encryption is irreversible.

  (Step S405) The storage unit 47 stores user identification information, date and time, and determination results. In step S404, if the pre-encryption information cannot be acquired and, as a result, the user identification information cannot be acquired, the storage unit 47 stores only the date and the determination result. Also good. As described above, the storage unit 47 may also store information for identifying the unlocking electronic key information accepted in step S403.

  (Step S406) The unlocking unit 48 determines whether or not the unlocking electronic key information is valid by the determining unit 46. If it is determined that the unlocking electronic key information is valid, the process proceeds to step S407, and if not, the process returns to step S401.

(Step S407) The unlocking unit 48 unlocks the electric lock 5. As a result, for example, the user can open the door locked with the electric lock 5 and enter the house. Then, the process returns to step S401. When the electric lock 5 is for locking and unlocking the door, the electric lock 5 may be automatically locked by closing the door.
In the flowchart of FIG. 9, the process is terminated by power-off or a process termination interrupt.

  FIG. 10 is a flowchart showing details of processing such as determination (step S404) in the flowchart of FIG. However, FIG. 10 shows processing such as determination when encryption is reversible.

  (Step S501) The pre-encryption information acquisition unit 45 uses the second encryption key information stored in the second encryption key information storage unit 42, and the unlocking electronic key information received by the unlocking electronic key information receiving unit 43. The pre-encryption information is obtained by decrypting the encrypted information included in the. The pre-encryption information may be temporarily stored in a recording medium (not shown). In addition, when it cannot decrypt with the 2nd encryption key information, the pre-encryption information acquisition part 45 shall pass to the judgment part 46 that it cannot decrypt. When decryption is not possible, generally, there is a possibility that an unauthorized third party is attempting to unlock using unauthorized unlocking electronic key information.

  (Step S502) The date acquisition unit 44 acquires the current date. The acquired date and time may be temporarily stored in a recording medium (not shown).

  (Step S503) The determination unit 46 determines whether the pre-encryption information is acquired by the pre-encryption information acquisition unit 45. If it has been acquired, the process proceeds to step S504. If it has not been acquired, that is, if it cannot be decrypted using the second encryption key information, the process proceeds to step S508.

  (Step S504) The determination unit 46 determines whether or not the decrypted date and time and the current date and time acquired by the date and time acquisition unit 44 in step S502 are substantially equal. If substantially the same, the process proceeds to step S505, and if not, the process proceeds to step S508.

(Step S505) When the unlocking electronic key information includes the number of times of unlocking, the determination unit 46 refers to the accumulation result, and the number of times of unlocking with the unlocking electronic key information indicates the unlocked electronic key information. It is determined whether the number is less than the number of times of unlocking included in the key information. If it is less, the process proceeds to step S506, and if not, the process proceeds to step S508. That is, it is determined as follows.
Number of times of past unlocking <Number of times of unlocking electronic key information → Valid for number of times of unlocking Number of times of past unlocking ≥ Number of times of unlocking electronic key information → Number of times of unlocking is not valid If the number of times of unlocking is not included in the key information, it is determined that the number of times of unlocking is valid, and the process proceeds to step S506.

(Step S506) When the unlocking electronic key information includes the unlocking period, the determining unit 46 refers to the accumulation result, and the current date and time is the date and time when the unlocking electronic key information was first unlocked. From this, it is determined whether or not the unlocking period included in the unlocking electronic key information has not been exceeded. And when not exceeding, it progresses to step S507, and when that is not right, it progresses to step S508. That is, it is determined as follows.
Current date and time-date and time of first unlocking ≤ Unlocking period → Justification for unlocking period Current date and time-Date and time of first unlocking> Unlocking period → Not valid for unlocking period If there is not, “the date and time of the first unlocking” in the above formula is assumed to be equal to the current date and time. If the unlocking period is not included in the unlocking electronic key information, it is determined that the unlocking period is valid, and the process proceeds to step S507.

  (Step S507) The determination unit 46 determines that the unlocking electronic key information received in step S403 is valid. This determination result may be temporarily stored in a recording medium (not shown). And it returns to the flowchart of FIG.

  (Step S508) The determination unit 46 determines that the unlocked electronic key information received in step S403 is not valid. This determination result may be temporarily stored in a recording medium (not shown). And it returns to the flowchart of FIG.

  In the flowchart of FIG. 10, the process of step S502 may be executed between the processes of step S503 and step S504. Further, the order of processing in steps S504 to S506 is not limited. Regardless of the order in which the processes of steps S504 to S506 are performed, if YES is determined in all the processes, the process proceeds to step S507, and if not, the process proceeds to step S508. Thus, in the flowchart of FIG. 10, there is a certain degree of arbitraryness in the order of processing.

  FIG. 11 is a flowchart showing details of processing such as determination (step S404) in the flowchart of FIG. However, FIG. 11 shows processing such as determination when encryption is irreversible.

  (Step S601) The date and time acquisition unit 44 acquires the current date and time. The acquired date and time may be temporarily stored in a recording medium (not shown).

  (Step S602) The pre-encryption information acquisition unit 45 acquires a pre-encryption information candidate. The candidate for the pre-encryption information may be acquired using a date and time within a range substantially equal to the current date and time acquired in step S601, for example.

  (Step S603) The pre-encryption information acquisition unit 45 uses the second encryption key information stored in the second encryption key information storage unit 42 to encrypt the pre-encryption information candidate acquired in step S602.

  (Step S604) The pre-encryption information acquisition unit 45 determines whether or not the encrypted information acquired in step S603 matches the encrypted information included in the unlocking electronic key information received in step S403. . If they match, the process proceeds to step S607 on the assumption that the pre-encryption information candidate acquired in step S602 is pre-encryption information. If not, the process proceeds to step S605.

  (Step S605) The pre-encryption information acquisition unit 45 determines whether to acquire a candidate for the next pre-encryption information. For example, when all the pre-encryption information candidates are acquired within a range substantially equal to the acquired current date and time, the pre-encryption information acquisition unit 45 determines not to acquire the next candidate. May be. On the other hand, for example, when there is a candidate for pre-encryption information that has not yet been acquired within a range that is substantially equal to the acquired current date and time, the pre-encryption information acquisition unit 45 acquires the next candidate. You may judge. If the next candidate is acquired, the process returns to step S602 to acquire a candidate for pre-encryption information that has not yet been acquired. If not, the process proceeds to step S606.

  (Step S606) The determination unit 46 determines that the unlocking electronic key information received by the unlocking electronic key information receiving unit 43 is not valid. This is because pre-encryption information could not be obtained. This determination result may be temporarily stored in a recording medium (not shown). And it returns to the flowchart of FIG.

  (Step S607) When the unlocking electronic key information includes the number of times of unlocking, the determination unit 46 refers to the accumulation result, and the number of times of unlocking with the unlocking electronic key information indicates the number of unlocked electronic keys. It is determined whether the number is less than the number of times of unlocking included in the key information. If the number is small, the process proceeds to step S608. If not, the process proceeds to step S606. When the unlocking electronic key information does not include the number of times of unlocking, it is determined that the number of times of unlocking is valid, and the process proceeds to step S608.

  (Step S608) When the unlocking period is included in the unlocking electronic key information, the determination unit 46 refers to the accumulation result, and the current date and time is the date and time when the unlocking electronic key information was first unlocked. From this, it is determined whether or not the unlocking period included in the unlocking electronic key information has not been exceeded. And when not exceeding, it progresses to step S609, and when that is not right, it progresses to step S606. If the unlocking period is not included in the unlocking electronic key information, it is determined that the unlocking period is valid, and the process proceeds to step S609.

  (Step S609) The determination unit 46 determines that the unlocking electronic key information received in step S403 is valid. This determination result may be temporarily stored in a recording medium (not shown). And it returns to the flowchart of FIG.

  Next, the operation of each device of the electronic unlocking system 100 according to the present embodiment will be described using a specific example. In this specific example, the electric lock 5 is a key of a house door, and the setting terminal 1 is installed in the house. Then, a resident of the house (referred to as a “setting person” in this specific example) uses the setting terminal 1 to make settings relating to unlocking to the server 2. And according to the setting, the unlocking electronic key information is transmitted from the server 2 to the user terminal 3 which is a mobile phone, and the user uses the unlocking electronic key information transmitted to the user terminal 3 to It is assumed that the electric lock 5 is unlocked and enters the house. In this specific example, a case where reversible encryption is performed will be described. In the setting terminal 1, it is assumed that the electric lock identification information “K001” for identifying the electric lock 5 is already stored in the electric lock identification information storage unit 14. In this specific example, it is assumed that the process of encrypting information using the encryption key information and the process of converting the information into a two-dimensional barcode are performed as encryption processes.

  First, a process for registering the second encryption key information in the electric lock terminal 4 will be described. The setter operates the touch panel of the electric lock terminal 4 to input second encryption key information “ABC-123-XYZ” that is the same information as the first encryption key information. Then, the second encryption key information is received by the second encryption key information receiving unit 41 (step S401) and accumulated in the second encryption key information storage unit 42 (step S402).

  Next, a process for registering the first encryption key information in the server 2 will be described. It is assumed that the setter operates the setting terminal 1 to display a screen for registering the first encryption key information. Then, as shown in FIG. 12, it is assumed that the personal identification number “1234” and the first encryption key information “ABC-123-XYZ” are input and the “Register” button is clicked. Then, the 1st encryption key information reception part 13 receives 1st encryption key information and a PIN, and passes them to the setting transmission part 15 (step S101). Upon receiving the first encryption key information and the like, the setting transmission unit 15 reads the electric lock identification information “K001” from the electric lock identification information storage unit 14, and the electric lock identification information “K001” and the password “1234” Then, a packet including the first encryption key information “ABC-123-XYZ” is formed, and the address of the server 2 set in advance is transmitted as the transmission destination (step S102).

  The packet including the first encryption key information and the like transmitted from the setting terminal 1 is received by the setting reception unit 22 of the server 2 (step S201), and the information is associated with the first encryption key information storage unit 21. Accumulated (step S202). The first record in FIG. 13 includes the first encryption key information and the like accumulated in this way. In the table of FIG. 13, the electric lock identification information, the password, and the first encryption key information are associated with each other. The personal identification number is information used for authentication whether or not the information regarding the unlocking setting transmitted from the setting terminal 1 is valid. The personal identification number is used to prevent unauthorized setting of unlocking.

  Next, the user identified by the user identification information “U001” wants to deliver the product to the setter around 10:30 am on March 27, 2009, and the solution for that. Suppose you receive a call saying that you want to set a lock. On the other hand, it is assumed that the setter replies that the setting is accepted. Then, it is assumed that the setter has set the unlocking from the setting terminal 1. That is, assume that the setter operates the setting terminal 1 to display a screen for setting unlocking. Then, as shown in FIG. 14, the setter is a personal identification number “1234”, user identification information “U001” for identifying the user who is permitted to unlock the door, and the unlocking date and time. Enter the unlocking date “March 27, 2009”, the unlocking time “10:30”, and the unlocking count “1”. In inputting these pieces of information, as shown in FIG. 14, each piece of information may be entered using a pull-down menu. When the setter operates the mouse and clicks the “set” button, the unlocking date / time is received by the unlocking date / time receiving unit 11 and temporarily stored (steps S103 and S104), and the user identification information is stored. It is received and temporarily stored by the user identification information receiving unit 12 (steps S105 and S106), and the unlocking number “1” is received and temporarily stored by a receiving unit (not shown). Thereafter, since the unlocking date and time etc. are temporarily stored, the setting transmission unit 15 determines that it is the timing for transmitting the unlocking date and time etc. (step S107), and the information and the electric lock identification information storage unit A packet including the electric lock identification information “K001” read from 14 is formed, and the address of the server 2 set in advance is transmitted as the transmission destination (step S108).

  A packet including the unlocking date and time transmitted from the setting terminal 1 is received by the setting receiving unit 22 of the server 2 (step S203), and passed to the encryption unit 23. The encryption unit 23 searches the table of FIG. 13 using the received personal identification number “1234” and the electric lock identification information “K001” as search keys. As a result, since the first record is hit, the encryption unit 23 reads the first encryption key information “ABC-123-XYZ” from the first record (step S204), and the first encryption key. The information is used to encrypt the unlocking date and time, and the encrypted unlocking date and time, the unencrypted user identification information, and the number of times of unlocking are converted into a two-dimensional barcode (step S205). Then, the encryption unit 23 unlocks the two-dimensional barcode, the received user identification information “U001”, and the received unlocking date and time “10:30 on March 27, 2009”. It is passed to the key information transmission unit 25.

  In this specific example, it is assumed that the address correspondence information storage unit 24 stores the address correspondence information shown in FIG. In FIG. 15, the user identification information is associated with the e-mail address of the user terminal 3. Upon receiving the two-dimensional barcode and the user identification information “U001” from the encryption unit 23, the unlocking electronic key information transmission unit 25 searches the address correspondence information in FIG. 15 using the user identification information as a search key. Then, the address “U001 @ abc ... ne.jp” is read from the hit first record (step S206). Then, an e-mail including the two-dimensional barcode received from the unlocking electronic key information transmitting unit 25 is transmitted using the address as a transmission destination (step S207). It is assumed that the subject of the e-mail is the unlocking date and time “March 27, 2009, 10:30”.

  The e-mail including the two-dimensional barcode transmitted from the server 2 is received by the unlocking electronic key information receiving unit 31 of the user terminal 3 (step S301) and stored by the unlocking electronic key information storage unit 32 ( Step S302). By viewing the subject of the received e-mail, the user can know that the unlocking electronic key information of the house to be visited on “March 27, 2009, 10:30” has been received.

  Next, the user goes to the setter's house with the user terminal 3 at 10:40 on March 27, 2009, and operates the user terminal 3 to obtain the subject “March 27, 2009 10 It is assumed that a two-dimensional barcode corresponding to “hour 30 minutes” is displayed on the screen (steps S303 and S304). Then, it is assumed that the two-dimensional barcode is held in front of the camera of the electric lock terminal 4. Then, the unlocking electronic key information receiving unit 43 reads the two-dimensional barcode (step S403) and passes it to the pre-encryption information acquisition unit 45. The pre-encryption information acquisition unit 45 obtains the number of times of unlocking, the user identification information, the encrypted unlocking date and time, which is information corresponding to the two-dimensional barcode, and the second encryption key information storage unit 42. The encrypted date and time of decryption is decrypted using the second encryption key information “ABC-123-XYZ” stored in (Step S501). As a result, the user identification information “U001”, the unlocking date and time “March 27, 2009, 10:30” and the number of times of unlocking “1” are acquired and passed to the determination unit 46. The user identification information and the unlock date / time are also passed to the storage unit 47. In addition, an instruction to acquire the date / time is passed from the unlocking electronic key information receiving unit 43 to the date / time acquiring unit 44 via a path (not shown), and the date / time acquiring unit 44 responds accordingly by the current date / time “2009”. "March 27th, 10:40" is acquired (step S502) and passed to the determination unit 46 and the storage unit 47.

  Thereafter, the determination unit 46 determines whether or not the unlocking electronic key information is valid. In this determination, if the current date and time and the unlocking date and time are within 15 minutes, it is determined that the unlocking date and time are valid. Specifically, the determination unit 46 determines that the pre-encryption information has been acquired because the unlock date / time has been received (step S503). Also, the current date and time received from the date and time acquisition unit 44 “March 27, 2009 10:40” and the unlocking date and time received from the pre-encryption information acquisition unit 45 “March 27, 2009 10:30” And the difference “10 minutes” between them is calculated. Since the difference is within 15 minutes, the determination unit 46 determines that the unlocking date and time is valid (step S504). Further, it is assumed that the information accumulated by the accumulation unit 47 so far is as shown in FIG. In FIG. 16, the current date and time used in the determination, the unlocking date and time included in the unlocking electronic key information, the user identification information included in the unlocking electronic key information, and the determination result correspond to each other. It is attached. In this specific example, since only the unlocking date and time are encrypted, when it is determined that the unlocking date and time are not valid because the decryption cannot be performed, the unlocking date and time is as shown in the second record of FIG. It will not be included. On the other hand, when it is determined that the unlocking date / time is not valid as in the third record in FIG. 16, the unlocking date / time and the user identification information are included.

  In the table of FIG. 16, the determination unit 46 determines that the determination result is “valid”, the user identification information is “U001” the same as the decrypted user identification information, and the unlock date / time is decrypted. The same record as “March 27, 2009 10:30” is searched. Here, the reason why the judgment result is “valid” is that the unlocking is performed only when the judgment result is judged to be “valid”. In order to count the number of times of unlocking, This is because it is only necessary to search for those whose judgment result is “valid”. Further, the number of hits in this search (that is, the number of records in FIG. 16 hit in the search) becomes the number of past unlocks. In this case, it is assumed that nothing is hit. Then, since “the number of times of past unlocking (= 0) <the number of times of unlocking electronic key information (= 1)”, the determination unit 46 determines that the number of times of unlocking is valid (step S505). ). Further, since the unlocking period is not included in the decryption result, the determination unit 46 determines that the unlocking period is also valid (step S506). As a result, the determination unit 46 finally determines that the unlocking electronic key information is valid, and passes the determination result to the storage unit 47 and the unlocking unit 48 (step S507). In this way, the process of determining whether it is valid ends (step S404).

  When the accumulating unit 47 receives the determination result indicating that it is valid from the determining unit 46, the accumulating unit 47, the user identification information “U001” acquired by the pre-encryption information acquiring unit 45, and the unlocking date and time “2009” “March 27 10:30” and the date and time “March 27, 2009 10:40” acquired by the date and time acquisition unit 44 are stored in association with each other. As a result, the first record in FIG. 17 is accumulated (step S405).

  When the unlocking unit 48 receives the determination result from the determining unit 46, the unlocking unit 48 determines that the determination result is valid (step S406), and unlocks the electric lock 5 (step S407). As a result, the user can open the door and enter the house to deliver the goods.

  When the same user tries to unlock with the same unlocking electronic key information after that, since the first record of FIG. 17 has already been accumulated, the number of past unlocks (= 1) Is equal to the number of times of unlocking electronic key information (= 1), and the judgment unit 46 judges that the number of times of unlocking is not valid (step S505), and judges that the unlocking electronic key information is not valid. (Step S508), unlocking is not performed (Step S406).

  Here, the case where irreversible encryption is performed will also be briefly described. Similarly to the above specific example, if the current date and time and the unlocking date and time are within 15 minutes, it is determined that the unlocking date and time is valid. The unlocking date and time can be set in units of 15 minutes (that is, the unlocking date and time can be set to “00 minutes”, “15 minutes”, “30 minutes”, or “45 minutes”). To do. Therefore, the unlock date / time candidates are 2 times of the 15 minute unit date immediately before the current date acquired by the date acquisition unit 44 and the 15 minute unit date immediately after the current date acquired by the date acquisition unit 44. Become a piece. Also in this case, only the unlocking date / time is encrypted using the first encryption key information, and the encrypted unlocking date / time, user identification information, and the number of times of unlocking are displayed in a two-dimensional bar. It has been converted to code. In this description, only the determination process by the determination unit 46 will be described.

  First, it is assumed that the two-dimensional barcode read by the unlocking electronic key information receiving unit 43 is passed to the pre-encryption information acquisition unit 45. Also, the unlock electronic key information receiving unit 43 gives an instruction to acquire the date and time through a route (not shown) to the date and time acquiring unit 44. In response, the date and time acquiring unit 44 receives the current date and time “2009”. "March 27th 10:40" is acquired (step S601) and passed to the pre-encryption information acquisition unit 45 and the storage unit 47. The pre-encryption information acquisition unit 45 acquires the number of times of unlocking, user identification information, and the encrypted unlocking date and time by first obtaining information corresponding to the two-dimensional barcode. And

  When the pre-encryption information acquisition unit 45 receives the current date and time, first, the date and time in units of 15 minutes before the current date and time, that is, “March 27, 2009 10:30” is set as the unlock date and time. Obtained as a candidate (step S602). The unlock date / time candidate is a candidate for pre-encryption information. Then, the pre-encryption information acquisition unit 45 encrypts the unlock date and time as a candidate for the pre-encryption information using the second encryption key information stored in the second encryption key information storage unit 42 (step S603). ). Since the encryption result matches the encrypted unlock date and time included in the unlocking electronic key information (step S604), the determination unit 46 determines that the determination result in the table of FIG. A record that is “valid”, the user identification information is “U001”, and the unlocking date and time is “March 27, 2009, 10:30” is searched. In this case, it is assumed that nothing is hit. Then, the determination unit 46 determines that the number of times of unlocking is valid (step S607). Further, since the unlocking period is not included in the unlocking electronic key information, the determination unit 46 determines that the unlocking period is also valid (step S608). As a result, the determination unit 46 finally determines that the unlocking electronic key information is valid, and passes the determination result to the storage unit 47 and the unlocking unit 48 (step S609). In this way, the process of determining whether it is valid ends (step S404). The subsequent processing is the same as the specific example in the case where the encryption described above is reversible, and the description thereof is omitted.

  Note that, in this specific example, the case where the unlock date / time is included in the subject of the e-mail transmitted to the user terminal 3 is not necessarily the case. For example, when an e-mail is stolen by a malicious third party, the date and time of unlocking will be notified. Therefore, the unlocking date and time and information for specifying the electric lock terminal 4 are unlocked. It may not be transmitted together with the electronic key information.

  Further, in this specific example, the case where the number of times of unlocking and the unlocking period are received by the setting terminal 1 and the number of times of unlocking is transmitted to the server 2 has been described. For example, in the server 2, the number of times of unlocking and the unlocking period are set in advance, and when the server 2 transmits the unlocking electronic key information, the unlocking including the set number of times of unlocking and the unlocking period is performed. The lock electronic key information may be transmitted. In the server 2, the number of times of unlocking and the unlocking period are set in advance. When the server 2 receives the number of times of unlocking and the unlocking period from the setting terminal 1, the server 2 displays the number of times of unlocking received. If the unlocking electronic key information including the number of times of unlocking is not received from the setting terminal 1, the unlocking electronic key information including the number of times of unlocking set in advance is transmitted. Also good. The preset number of times of unlocking may be “1”. Further, the preset unlocking period may be “0”. In such a setting, unlocking using the unlocking electronic key information is performed only once.

  In this specific example, the case where the unlocking electronic key information is a two-dimensional barcode has been described. However, as described above, this is an example, and the unlocking electronic key information is a sequence of symbols, numbers, characters, and the like. It may be. The user manually inputs the unlocking electronic key information by operating an input device such as a touch panel of the electric locking terminal 4 while viewing the unlocking electronic key information displayed on the display of the user terminal 3. May be.

  Further, in this specific example, the case where the resident of the house performs the unlocking setting has been described, but other persons may perform the unlocking setting. For example, a police officer, a fire brigade, or the like may be able to set unlocking by operating the setting terminal 1 installed in a police station or a fire station. By doing so, it may be possible to perform unlocking without obtaining permission from the resident in the event of an incident or fire.

Further, in the encryption in this specific example, the case where the first encryption key information is used only for the encryption that is not the conversion to the two-dimensional barcode has been described, but the conversion algorithm to the two-dimensional barcode is also the first encryption It may be included in the key information. In this case, the first encryption key information has both information used for encryption such as “ABC-123-XYZ” and a conversion algorithm to a two-dimensional barcode. The same may be applied to the second encryption key information used when acquiring the pre-encryption information.
In this specific example, for example, the first encryption key information may be a combination of electric lock identification information and a personal identification number.

  As described above, in the electronic unlocking system 100 according to the present embodiment, the unlocking electronic key information designating the unlocking date and time that is the date and time when the electric lock 5 is unlocked can be issued. Only the electric lock 5 can be unlocked. Thus, for example, in the case of a service in which a distributor delivers fresh food products to a customer's house, the distributor unlocks the electric lock 5 only at a designated date and time and enters the house. Can deliver fresh food products. Further, since the unlocking date / time is at least encrypted, it is possible to prevent the user or the like from changing the unlocking date / time arbitrarily. Therefore, safety is improved.

  In addition, by setting the number of times of unlocking and the unlocking period, the number of times of unlocking and the period of time for unlocking can be limited. Therefore, for example, by setting so that it can be unlocked twice or more using one unlocking electronic key information, it is possible to perform unlocking multiple times when it is necessary to repeatedly unlock Thus, convenience for the user is improved. Also, for example, by restricting the number of times of unlocking to one, after a legitimate user unlocks once using the unlocking electronic key information, a malicious third party can unlock the unlocking electronic key information. Even if you try to steal and unlock, you will not be able to unlock. In addition, when the number of times of unlocking is limited to one, the malicious third party who stolen the unlocking electronic key information before the authorized user unlocked using the unlocking electronic key information. If the user has unlocked, the legitimate user knows that the unlocking process has already been performed based on the stolen unlocking electronic key information because unlocking cannot be performed. It is possible to confirm whether there is anything stolen in response to the unauthorized unlocking.

  In the present embodiment, the case where the door of the house is unlocked / locked by the electric lock 5 has been described, but this need not be the case. The unlocking with the electric lock 5 may be, for example, unlocking a door or gate of a company or a building, or unlocking a locker, a safe door, a desk drawer, etc. It may be unlocked for starting the device or the like. For example, in a service for sharing a car between users registered in advance, the unlocking electronic key information corresponding to the period during which the user can use the car is issued to the user (user) who uses the car. The user may use the unlocking electronic key information to unlock the door of the automobile or start the engine of the automobile. By doing so, it may be possible for a plurality of people to use the vehicle without exchanging physical keys. In this case, it is preferable that the unlocking date and time indicate the time when the car can be used. That is, it is preferable that the unlocking date and time is an unlocking period. Also, since two or more people cannot use the same car at the same time, the unlocking electronic key used to unlock the car door or start the car engine for each date and time In order for the information to become one (that is, for each date and time, only one person can use one car), in the server 2, for one electric lock, the overlapping unlock date and time (Unlock period) may not be set. Specifically, in the server 2, set information, for example, electric lock identification information, and the unlock date and time (unlock period) set for the electric lock identified by the electric lock identification information are displayed. At least information to be associated is retained. Then, the server 2 receives the unlocking date and time (unlocking period), the electric lock identification information, and the user identification information transmitted from the setting terminal 1, and holds them in correspondence with the electric lock identification information. Referring to the unlocked date and time (unlocking period), it is determined whether the stored unlocking date and time (unlocking period) overlaps with the received unlocking date and time (unlocking period). It may be transmitted again to the setting terminal 1 that the setting is performed at another unlocking date and time (unlocking period). In response to this, the setter again performs setting at another unlocking date and time (unlocking period).

  Further, in the present embodiment, the unlocking electronic key information transmitting unit 25 uses the address associated with the user identification information received by the setting receiving unit 22 in the address correspondence information as the transmission destination and outputs the unlocking electronic key information. Although the case of transmitting has been described, this need not be the case. For example, when the user identification information itself is information on a transmission destination corresponding to the user identified by the user identification information, for example, when the user identification information is an e-mail address or an IP address. The unlocking electronic key information transmission unit 25 may transmit the unlocking electronic key information to the transmission destination indicated by the user identification information. In such a case, the server 2 may not include the address correspondence information storage unit 24.

  Moreover, although the case where 2nd encryption key information was accumulate | stored in the electric lock terminal 4 was demonstrated in this Embodiment, it may not be so. In the electric lock terminal 4, the second encryption key information may be stored from the beginning (for example, from the time of shipment). For example, when the first encryption key information is the same as the second encryption key information, the second encryption key information may be read and transmitted from the setting terminal 1 to the server 2. When the first encryption key information and the second encryption key information are different, the electric lock terminal 4 may also store the first encryption key information. Then, the first encryption key information may be read and transmitted from the setting terminal 1 to the server 2. As described above, when the second encryption key information is stored from the beginning, the electric lock terminal 4 may not include the second encryption key information receiving unit 41.

  Further, in the present embodiment, when the unlocking electronic key information includes the number of times of unlocking and the unlocking period, the number of times of unlocking and the unlocking period are determined by the determining unit 46. Although the case where the lock period itself was shown was demonstrated, it may not be so. For example, the unlocking electronic key information includes information obtained by adding or subtracting a predetermined number to the original number of times of unlocking or unlocking period (also referred to as the number of times of unlocking or unlocking period). The unit 46 may make the determination after returning the information to the original number of times of unlocking and the unlocking period. Specifically, when the unlocking electronic key information includes a value obtained by adding “1” to the original number of times of unlocking, the determination unit 46 determines from the number of times of unlocking included in the unlocking electronic key information “ The original number of times of unlocking may be acquired by subtracting “1”, and a determination may be made using the number of times of original unlocking.

  Moreover, although the case where the determination using the unlocking period is also described in the present embodiment, the determination using the unlocking period may not be performed. In that case, the unlocking period may not be included in the unlocking electronic key information.

  In the present embodiment, the case has been described in which the determination using the number of times of unlocking is performed when the number of times of unlocking is included in the unlocking electronic key information, but this need not be the case. For example, even when the unlocking electronic key information does not include the number of times of unlocking, the determination unit 46 refers to the accumulation result and determines that the unlocking electronic key information has been unlocked once in the past. May not be unlocked for the second and subsequent times.

  Moreover, although the case where the determination using the number of times of unlocking is described in the present embodiment, the determination using the number of times of unlocking may not be performed. In that case, the unlocking electronic key information may not include the number of times of unlocking.

  In the present embodiment, the case where user identification information and the like are stored by the storage unit 47 has been described. However, the storage may not be performed. When the accumulation by the accumulation unit 47 is not performed, the electric lock terminal 4 may not include the accumulation unit 47. Further, when the accumulation by the accumulation unit 47 is not performed, the user identification information may not be included in the unlocking electronic key information.

  In the present embodiment, the server 2 stores the first encryption key information and the electric lock identification information in association with each other, and the server 2 corresponds to the electric lock identification information received from the setting terminal 1. Although the case where encryption is performed using the first encryption key information has been described, this need not be the case. For example, the encryption performed in the server 2 may be executed using one first encryption key information. In that case, the setting terminal 1 may not transmit the electric lock identification information to the server 2. When the setting terminal 1 does not transmit the electric lock identification information to the server 2, the setting terminal 1 may not include the electric lock identification information storage unit 14.

  In the above embodiment, each process or each function may be realized by centralized processing by a single device or a single system, or may be distributedly processed by a plurality of devices or a plurality of systems. It may be realized by doing.

  In the above embodiment, information related to processing executed by each component, for example, information received, acquired, selected, generated, transmitted, or received by each component In addition, information such as threshold values, mathematical formulas, addresses, etc. used by each component in processing is retained temporarily or over a long period of time on a recording medium (not shown) even when not explicitly stated in the above description. It may be. Further, the storage of information in the recording medium (not shown) may be performed by each component or a storage unit (not shown). Further, reading of information from the recording medium (not shown) may be performed by each component or a reading unit (not shown).

  In the above embodiment, when information used by each component, for example, information such as a threshold value, an address, and various setting values used by each component may be changed by the user Even if it is not specified in the above description, the user may be able to change the information as appropriate, or it may not be. If the information can be changed by the user, the change is realized by, for example, a not-shown receiving unit that receives a change instruction from the user and a changing unit (not shown) that changes the information in accordance with the change instruction. May be. The change instruction received by the receiving unit (not shown) may be received from an input device, information received via a communication line, or information read from a predetermined recording medium, for example. .

  Moreover, in the said embodiment, when two or more components contained in the setting terminal 1, the server 2, and the user terminal 3 have a communication device, an input device, etc., two or more components are physically single. Or may have separate devices.

  In the above embodiment, each component may be configured by dedicated hardware, or a component that can be realized by software may be realized by executing a program. For example, each component can be realized by a program execution unit such as a CPU reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory. In addition, the software which implement | achieves the setting terminal 1 in the said embodiment is the following programs. In other words, this program allows the computer to receive the unlock date / time receiving unit that receives the unlock date / time, which is the date / time when the electric lock is unlocked, and to identify the user identifying information that identifies the user performing the unlocking. It is a program for functioning as an information reception unit, a setting transmission unit that transmits the unlocking date and time received by the unlocking date reception unit and the user identification information received by the user identification information reception unit.

  Moreover, the software which implement | achieves the server 2 in the said embodiment is the following programs. In other words, the program receives the setting reception for receiving the unlocked date and time that is the date and time when the electric lock is unlocked and the user identification information that is information for identifying the user who performs unlocking. Using the first encryption key information stored in the first encryption key information storage unit in which the first encryption key information, which is information used for encryption, is stored. An encryption unit that encrypts at least the date and time, and unlocking electronic key information that includes at least the unlocking date and time encrypted by the encryption unit is transmitted to a transmission destination corresponding to the user identification information received by the setting reception unit It is a program for functioning as an unlocking electronic key information transmission unit.

  Moreover, the software which implement | achieves the user terminal 3 in the said embodiment is the following programs. In other words, the program includes an unlocking electronic key information receiving unit that receives the unlocking electronic key information including at least the encrypted unlocking date and time, which is the date and time when the computer unlocks the electric lock. Unlocking electronic key information storage unit for storing the unlocking electronic key information received by the unlocking electronic key information receiving unit, Unlocking electronic key information for outputting the unlocking electronic key information stored by the unlocking electronic key information storage unit This is a program for functioning as an output unit.

  Moreover, the software which implement | achieves the electric lock terminal 4 in the said embodiment is the following programs. That is, this program acquires an unlocking electronic key information receiving unit for receiving unlocking electronic key information including at least an encrypted unlocking date and time that is a date and time for unlocking an electric lock, and acquires the current date and time. The date and time acquisition unit is information corresponding to the first encryption key information which is information used in encryption, and the encrypted information included in the unlocking electronic key information received by the unlocking electronic key information receiving unit Using the second encryption key information stored in the second encryption key information storage unit in which the second encryption key information, which is information used for obtaining the information before being encrypted, is used, the unlocking The pre-encryption information acquisition unit that acquires pre-encryption information that is the information before encryption corresponding to the encrypted information included in the unlocked electronic key information received by the electronic key information reception unit, the date and time acquisition unit The acquired current date and time and the cipher A determination unit that determines whether the unlocking electronic key information received by the unlocking electronic key information receiving unit is valid using at least the acquisition result by the information acquiring unit, and the unlocking electronic key information receiving unit includes: A program for functioning as an unlocking unit for unlocking an electric lock when the determination unit determines that the received unlocking electronic key information is valid.

  In the program, the functions realized by the program do not include functions that can be realized only by hardware. For example, the above program realizes functions that can be realized only by hardware such as a modem or an interface card in a reception unit that receives information, a reception unit that receives information, a transmission unit that transmits information, and an output unit that outputs information. It is at least not included in the function to do.

  Further, this program may be executed by being downloaded from a server or the like, and a program recorded on a predetermined recording medium (for example, an optical disc such as a CD-ROM, a magnetic disc, a semiconductor memory, etc.) is read out. May be executed. Further, this program may be used as a program constituting a program product.

  Further, the computer that executes this program may be singular or plural. That is, centralized processing may be performed, or distributed processing may be performed.

  FIG. 18 is a schematic diagram showing an example of an external appearance of a computer that executes the program and realizes the setting terminal 1, the server 2, the user terminal 3, and the electric lock terminal 4 according to the above-described embodiment. The above-described embodiment can be realized by computer hardware and a computer program executed on the computer hardware.

  18, a computer system 900 includes a computer 901 including a CD-ROM (Compact Disk Read Only Memory) drive 905 and an FD (Floppy (registered trademark) Disk) drive 906, a keyboard 902, a mouse 903, a monitor 904, and the like. Is provided.

  FIG. 19 is a diagram showing an internal configuration of the computer system 900. In FIG. 19, in addition to the CD-ROM drive 905 and the FD drive 906, a computer 901 is connected to an MPU (Micro Processing Unit) 911, a ROM 912 for storing a program such as a bootup program, and the MPU 911. A RAM (Random Access Memory) 913 that temporarily stores program instructions and provides a temporary storage space, a hard disk 914 that stores application programs, system programs, and data, and an MPU 911 and a ROM 912 are interconnected. And a bus 915. The computer 901 may include a network card (not shown) that provides connection to the LAN.

  A program for causing the computer system 900 to execute the functions of the setting terminal 1, the server 2, the user terminal 3, and the electric lock terminal 4 according to the above embodiment is stored in the CD-ROM 921 or the FD 922, and the CD-ROM drive 905. Or may be inserted into the FD drive 906 and transferred to the hard disk 914. Instead, the program may be transmitted to the computer 901 via a network (not shown) and stored in the hard disk 914. The program is loaded into the RAM 913 when executed. The program may be loaded directly from the CD-ROM 921, the FD 922, or the network.

  The program does not necessarily include an operating system (OS) or a third-party program that causes the computer 901 to execute the functions of the setting terminal 1, the server 2, the user terminal 3, and the electric lock terminal 4 according to the above embodiment. May be. The program may include only a part of an instruction that calls an appropriate function (module) in a controlled manner and obtains a desired result. How the computer system 900 operates is well known and will not be described in detail.

  Further, the present invention is not limited to the above-described embodiments, and various modifications are possible, and it goes without saying that these are also included in the scope of the present invention.

  As described above, according to the electronic unlocking system and the like according to the present invention, the effect that a third party can unlock the electric lock within a necessary range is obtained. For example, the door of the entrance is unlocked. It is useful as a system to perform.

DESCRIPTION OF SYMBOLS 1 Setting terminal 2 Server 3 User terminal 4 Electric lock terminal 5 Electric lock 11 Unlocking date reception part 12 User identification information reception part 13 First encryption key information reception part 14 Electric lock identification information storage part 15 Setting transmission part 21 1st One encryption key information storage unit 22 Setting reception unit 23 Encryption unit 24 Address correspondence information storage unit 25 Unlocking electronic key information transmission unit 31 Unlocking electronic key information reception unit 32 Unlocking electronic key information storage unit 33 Unlocking electronic key information Output unit 41 Second encryption key information reception unit 42 Second encryption key information storage unit 43 Unlocked electronic key information reception unit 44 Date and time acquisition unit 45 Pre-encryption information acquisition unit 46 Judgment unit 47 Storage unit 48 Unlocking unit

Claims (11)

An electronic unlocking system comprising a setting terminal, a server, a user terminal, and an electric lock terminal,
The setting terminal is
An unlocking date and time receiving unit for receiving an input of the unlocking date and time which is the date and time for unlocking the electric lock;
A user identification information receiving unit for receiving user identification information for identifying a user performing unlocking;
A setting transmission unit that transmits the unlocking date and time received by the unlocking date and time reception unit and the user identification information received by the user identification information reception unit to the server;
The server
A setting receiving unit for receiving the unlocking date and time and user identification information transmitted by the setting transmitting unit;
A first encryption key information storage unit for storing first encryption key information which is information used for encryption;
Using the first encryption key information stored in the first encryption key information storage unit, an encryption unit that at least encrypts the unlocking date and time received by the setting reception unit;
An unlocking electronic key information transmitting unit that transmits unlocking electronic key information including at least the unlocking date and time encrypted by the encryption unit to a transmission destination corresponding to the user identification information received by the setting receiving unit; Prepared,
The user terminal is
An unlocking electronic key information receiving unit for receiving the unlocking electronic key information transmitted by the unlocking electronic key information transmitting unit;
An unlocking electronic key information storage unit that stores the unlocking electronic key information received by the unlocking electronic key information receiving unit;
An unlocking electronic key information output unit that outputs the unlocking electronic key information stored in the unlocking electronic key information storage unit,
The electric lock terminal is
An unlocking electronic key information receiving unit for receiving the unlocking electronic key information output by the unlocking electronic key information output unit;
A date and time acquisition unit for acquiring the current date and time;
For obtaining information before encryption corresponding to the encrypted information included in the unlocking electronic key information received by the unlocking electronic key information receiving unit, the information corresponding to the first encryption key information A second encryption key information storage unit for storing second encryption key information which is information to be used;
Using the second encryption key information stored in the second encryption key information storage unit, encryption corresponding to the encrypted information included in the unlocking electronic key information received by the unlocking electronic key information receiving unit A pre-encryption information acquisition unit that acquires pre-encryption information that is information before being converted,
Whether the unlocking electronic key information received by the unlocking electronic key information receiving unit is valid using at least the current date and time acquired by the date / time acquiring unit and the acquisition result by the pre-encryption information acquiring unit A determination unit for determining whether or not
An unlocking unit for unlocking an electric lock when the determination unit determines that the unlocking electronic key information received by the unlocking electronic key information receiving unit is valid. Lock system. The setting terminal is
An electric lock identification information storage unit for storing electric lock identification information for identifying the electric lock;
The setting transmission unit transmits the unlocking date and time, user identification information, and electric lock identification information stored in the electric lock identification information storage unit to the server,
The setting receiving unit receives unlocking date and time, user identification information, and electric lock identification information,
The first encryption key information storage unit stores the first encryption key information and electric lock identification information in association with each other,
The electronic unlocking system according to claim 1, wherein the encryption unit performs encryption using first encryption key information corresponding to the electric lock identification information received by the setting reception unit. The unlocking electronic key information transmitted by the unlocking electronic key information transmitting unit also includes user identification information corresponding to the transmission destination of the unlocking electronic key information,
The electric lock terminal is
User identification information included in the unlocking electronic key information, date and time acquired by the date and time acquisition unit at the time when the unlocking electronic key information is received, and the determination corresponding to the unlocking electronic key information The electronic unlocking system according to claim 1, further comprising a storage unit that stores the determination result by the unit in association with each other. The unlocking electronic key information transmitted by the unlocking electronic key information transmitting unit includes the number of times of unlocking,
The determination unit refers to a storage result by the storage unit, and unlocking according to the number of times of unlocking included in the unlocking electronic key information received by the unlocking electronic key information receiving unit is the unlocking electronic key information. The electronic unlocking system according to claim 3, wherein the unlocking electronic key information is determined not to be valid when it has already been performed in response to the user identification information included in. The unlocking electronic key information transmitted by the unlocking electronic key information transmitting unit includes an unlocking period,
The determination unit refers to the accumulation result by the accumulation unit, and the current date and time acquired by the date and time acquisition unit is included in the unlocking electronic key information received by the unlocking electronic key information reception unit. 4. When the unlocking period included in the unlocking electronic key information is exceeded from the date and time of the first unlocking corresponding to the unlocking, it is determined that the unlocking electronic key information is not valid. Electronic unlocking system. The electronic unlocking system according to any one of claims 1 to 5, wherein the pre-encryption information acquisition unit acquires pre-encryption information by decrypting encrypted information using the second encryption key information. . The pre-encryption information acquisition unit acquires a pre-encryption information candidate, encrypts the acquired pre-encryption information candidate using the second encryption key information, and the encrypted information is stored in the unlocked electronic key. The electronic unlocking system according to any one of claims 1 to 5, wherein pre-encryption information that is a candidate for the acquired pre-encryption information is acquired when the information matches the encrypted information included in the information. A server constituting an electronic unlocking system including a setting terminal, a server, a user terminal, and an electric lock terminal,
The setting terminal is
An unlocking date and time receiving unit for receiving an input of the unlocking date and time which is the date and time for unlocking the electric lock;
A user identification information receiving unit for receiving user identification information for identifying a user performing unlocking;
A setting transmission unit that transmits the unlocking date and time received by the unlocking date and time reception unit and the user identification information received by the user identification information reception unit to the server;
The server
A setting receiving unit for receiving the unlocking date and time and user identification information transmitted by the setting transmitting unit;
A first encryption key information storage unit for storing first encryption key information which is information used for encryption;
Using the first encryption key information stored in the first encryption key information storage unit, an encryption unit that at least encrypts the unlocking date and time received by the setting reception unit;
An unlocking electronic key information transmitting unit that transmits unlocking electronic key information including at least the unlocking date and time encrypted by the encryption unit to a transmission destination corresponding to the user identification information received by the setting receiving unit; Prepared,
The user terminal is
An unlocking electronic key information receiving unit for receiving the unlocking electronic key information transmitted by the unlocking electronic key information transmitting unit;
An unlocking electronic key information storage unit that stores the unlocking electronic key information received by the unlocking electronic key information receiving unit;
An unlocking electronic key information output unit that outputs the unlocking electronic key information stored in the unlocking electronic key information storage unit,
The electric lock terminal is
An unlocking electronic key information receiving unit for receiving the unlocking electronic key information output by the unlocking electronic key information output unit;
A date and time acquisition unit for acquiring the current date and time;
For obtaining information before encryption corresponding to the encrypted information included in the unlocking electronic key information received by the unlocking electronic key information receiving unit, the information corresponding to the first encryption key information A second encryption key information storage unit for storing second encryption key information which is information to be used;
Using the second encryption key information stored in the second encryption key information storage unit, encryption corresponding to the encrypted information included in the unlocking electronic key information received by the unlocking electronic key information receiving unit A pre-encryption information acquisition unit that acquires pre-encryption information that is information before being converted,
Whether the unlocking electronic key information received by the unlocking electronic key information receiving unit is valid using at least the current date and time acquired by the date / time acquiring unit and the acquisition result by the pre-encryption information acquiring unit A determination unit for determining whether or not
A server comprising: an unlocking unit that unlocks an electric lock when the determination unit determines that the unlocking electronic key information received by the unlocking electronic key information receiving unit is valid. A user terminal constituting an electronic unlocking system including a setting terminal, a server, a user terminal, and an electric lock terminal,
The setting terminal is
An unlocking date and time receiving unit for receiving an input of the unlocking date and time which is the date and time for unlocking the electric lock;
A user identification information receiving unit for receiving user identification information for identifying a user performing unlocking;
A setting transmission unit that transmits the unlocking date and time received by the unlocking date and time reception unit and the user identification information received by the user identification information reception unit to the server;
The server
A setting receiving unit for receiving the unlocking date and time and user identification information transmitted by the setting transmitting unit;
A first encryption key information storage unit for storing first encryption key information which is information used for encryption;
Using the first encryption key information stored in the first encryption key information storage unit, an encryption unit that at least encrypts the unlocking date and time received by the setting reception unit;
An unlocking electronic key information transmitting unit that transmits unlocking electronic key information including at least the unlocking date and time encrypted by the encryption unit to a transmission destination corresponding to the user identification information received by the setting receiving unit; Prepared,
The user terminal is
An unlocking electronic key information receiving unit for receiving the unlocking electronic key information transmitted by the unlocking electronic key information transmitting unit;
An unlocking electronic key information storage unit that stores the unlocking electronic key information received by the unlocking electronic key information receiving unit;
An unlocking electronic key information output unit that outputs the unlocking electronic key information stored in the unlocking electronic key information storage unit,
The electric lock terminal is
An unlocking electronic key information receiving unit for receiving the unlocking electronic key information output by the unlocking electronic key information output unit;
A date and time acquisition unit for acquiring the current date and time;
For obtaining information before encryption corresponding to the encrypted information included in the unlocking electronic key information received by the unlocking electronic key information receiving unit, the information corresponding to the first encryption key information A second encryption key information storage unit for storing second encryption key information which is information to be used;
Using the second encryption key information stored in the second encryption key information storage unit, encryption corresponding to the encrypted information included in the unlocking electronic key information received by the unlocking electronic key information receiving unit A pre-encryption information acquisition unit that acquires pre-encryption information that is information before being converted,
Whether the unlocking electronic key information received by the unlocking electronic key information receiving unit is valid using at least the current date and time acquired by the date / time acquiring unit and the acquisition result by the pre-encryption information acquiring unit A determination unit for determining whether or not
A user comprising: an unlocking unit for unlocking an electric lock when the determination unit determines that the unlocking electronic key information received by the unlocking electronic key information receiving unit is valid Terminal. An electric lock terminal constituting an electronic unlocking system including a setting terminal, a server, a user terminal, and an electric lock terminal,
The setting terminal is
An unlocking date and time receiving unit for receiving an input of the unlocking date and time which is the date and time for unlocking the electric lock;
A user identification information receiving unit for receiving user identification information for identifying a user performing unlocking;
A setting transmission unit that transmits the unlocking date and time received by the unlocking date and time reception unit and the user identification information received by the user identification information reception unit to the server;
The server
A setting receiving unit for receiving the unlocking date and time and user identification information transmitted by the setting transmitting unit;
A first encryption key information storage unit for storing first encryption key information which is information used for encryption;
Using the first encryption key information stored in the first encryption key information storage unit, an encryption unit that at least encrypts the unlocking date and time received by the setting reception unit;
An unlocking electronic key information transmitting unit that transmits unlocking electronic key information including at least the unlocking date and time encrypted by the encryption unit to a transmission destination corresponding to the user identification information received by the setting receiving unit; Prepared,
The user terminal is
An unlocking electronic key information receiving unit for receiving the unlocking electronic key information transmitted by the unlocking electronic key information transmitting unit;
An unlocking electronic key information storage unit that stores the unlocking electronic key information received by the unlocking electronic key information receiving unit;
An unlocking electronic key information output unit that outputs the unlocking electronic key information stored in the unlocking electronic key information storage unit,
The electric lock terminal is
An unlocking electronic key information receiving unit for receiving the unlocking electronic key information output by the unlocking electronic key information output unit;
A date and time acquisition unit for acquiring the current date and time;
For obtaining information before encryption corresponding to the encrypted information included in the unlocking electronic key information received by the unlocking electronic key information receiving unit, the information corresponding to the first encryption key information A second encryption key information storage unit for storing second encryption key information which is information to be used;
Using the second encryption key information stored in the second encryption key information storage unit, encryption corresponding to the encrypted information included in the unlocking electronic key information received by the unlocking electronic key information receiving unit A pre-encryption information acquisition unit that acquires pre-encryption information that is information before being converted,
Whether the unlocking electronic key information received by the unlocking electronic key information receiving unit is valid using at least the current date and time acquired by the date / time acquiring unit and the acquisition result by the pre-encryption information acquiring unit A determination unit for determining whether or not
An electric lock comprising: an unlocking unit that unlocks the electric lock when the determination unit determines that the unlocking electronic key information received by the unlocking electronic key information receiving unit is valid Terminal. It is processed using a setting receiving unit, a first encryption key information storage unit that stores first encryption key information that is information used for encryption, an encryption unit, and an unlocking electronic key information transmission unit. An information processing method,
A setting receiving step for receiving the unlocking date and time, which is the date and time when the electric lock is unlocked, and the user identification information for identifying the user performing the unlocking, transmitted from the setting terminal;
The encryption unit encrypts at least the unlock date and time received in the setting reception step using the first encryption key information stored in the first encryption key information storage unit;
The unlocking electronic key information transmitting unit transmits the unlocking electronic key information including at least the unlocking date and time encrypted in the encrypting step to a transmission destination corresponding to the user identification information received in the setting receiving step. An information processing method comprising: an unlocking electronic key information transmission step.

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