Abstract: A locking and unlocking system includes: a mobile terminal; and a key unit, wherein the mobile terminal includes a terminal transmission unit configured to transmit first authentication information and a first request signal to the key unit, the key unit includes: a key unit reception unit configured to receive the first authentication information and the first request signal from the mobile terminal; a first authentication unit configured to perform authentication; and a locking and unlocking processing unit configured to perform a process of unlocking or locking the door, and the first authentication unit is configured to prohibit the authentication of the mobile terminal in a case where the first authentication unit has once performed the authentication.

Abstract: A locking and unlocking system includes: a server; a mobile terminal; and a key unit, wherein the server includes a server transmission unit configured to transmit cancel information, wherein the mobile terminal includes a terminal transmission unit configured to transmit first authentication information and a first request signal, wherein the key unit includes: a key-unit first reception unit configured to receive the cancel information; a key-unit second reception unit configured to receive the first authentication information and the first request signal; a first authentication unit configured to authenticate the mobile terminal; and a locking and unlocking processing unit configured to perform a process of unlocking or locking the door of the vehicle or facility, and wherein the locking and unlocking processing unit is configured to prohibit unlocking of the door of the vehicle or facility.

Abstract: A locking and unlocking system includes: a server; a mobile terminal; and a key unit, wherein the server includes a server transmission unit configured to transmit cancel information, wherein the mobile terminal includes a terminal transmission unit configured to transmit first authentication information and a first request signal, wherein the key unit includes: a key-unit first reception unit configured to receive the cancel information; a key-unit second reception unit configured to receive the first authentication information and the first request signal; a first authentication unit configured to authenticate the mobile terminal; and a locking and unlocking processing unit configured to perform a process of unlocking or locking the door of the vehicle or facility, and wherein the locking and unlocking processing unit is configured to prohibit unlocking of the door of the vehicle or facility.

Abstract: A locking and unlocking system includes: a server; a mobile terminal; and a key unit, wherein the server includes a server transmission unit configured to transmit cancel information, wherein the mobile terminal includes a terminal transmission unit configured to transmit first authentication information and a first request signal, wherein the key unit includes: a key-unit first reception unit configured to receive the cancel information; a key-unit second reception unit configured to receive the first authentication information and the first request signal; a first authentication unit configured to authenticate the mobile terminal; and a locking and unlocking processing unit configured to perform a process of unlocking or locking the door of the vehicle or facility, and wherein the locking and unlocking processing unit is configured to prohibit unlocking of the door of the vehicle or facility.

Abstract: A mobile terminal includes a transmission unit that transmits authentication information including a start time and an end time of a reservation and a request signal for requesting locking and unlocking of a door to the key unit. The key unit includes a reception unit that receives the authentication information and the request signal, an authentication unit that authenticates the mobile terminal when the authentication information is received, a determination unit that determines whether a current time is within a reservation time, and a locking and unlocking processing unit that prohibits unlocking of the door when it is determined that the current time is not within the reservation time on the premise that the door is unlocked/locked when the authentication succeeds and the request signal is received.

Abstract: A mobile terminal includes a transmission unit that transmits authentication information including a start time and an end time of a reservation and a request signal for requesting locking and unlocking of a door to the key unit. The key unit includes a reception unit that receives the authentication information and the request signal, an authentication unit that authenticates the mobile terminal when the authentication information is received, a determination unit that determines whether a current time is within a reservation time, and a locking and unlocking processing unit that prohibits unlocking of the door when it is determined that the current time is not within the reservation time on the premise that the door is unlocked/locked when the authentication succeeds and the request signal is received.

Abstract: A locking and unlocking system includes: a server; a mobile terminal; and a key unit, wherein the server includes a server transmission unit configured to transmit cancel information, wherein the mobile terminal includes a terminal transmission unit configured to transmit first authentication information and a first request signal, wherein the key unit includes: a key-unit first reception unit configured to receive the cancel information; a key-unit second reception unit configured to receive the first authentication information and the first request signal; a first authentication unit configured to authenticate the mobile terminal; and a locking and unlocking processing unit configured to perform a process of unlocking or locking the door of the vehicle or facility, and wherein the locking and unlocking processing unit is configured to prohibit unlocking of the door of the vehicle or facility.

Abstract: A locking and unlocking system includes: a mobile terminal; and a key unit, wherein the mobile terminal includes a terminal transmission unit configured to transmit first authentication information and a first request signal to the key unit, the key unit includes: a key unit reception unit configured to receive the first authentication information and the first request signal from the mobile terminal; a first authentication unit configured to perform authentication; and a locking and unlocking processing unit configured to perform a process of unlocking or locking the door, and the first authentication unit is configured to prohibit the authentication of the mobile terminal in a case where the first authentication unit has once performed the authentication.