Locking and unlocking system and key unit

A locking and unlocking system comprising:

• a portable terminal;
• a key unit arranged inside a vehicle or facilities;
• and
• a locking and unlocking device installed in the vehicle or the facilities, wherein
• the portable terminal includes a first sending unit configured to send a first request to the key unit, the first request including first authentication information associated with the key unit,
• the key unit includes:
• a first receiving unit configured to receive the first request from the portable terminal;
• a first storage unit configured to store second authentication information associated with the vehicle or the facilities;
• a first authentication unit configured to perform authentication based on the first authentication information included in the first request when the first receiving unit receives the first request;
• an access management unit configured to change the second authentication information in the first storage unit from an inaccessible state to an accessible state, when the authentication by the first authentication unit is successful;
• and
• a second sending unit configured to send a second request to the locking and unlocking device, the second request including the second authentication information, and
• the locking and unlocking device includes:
• a second receiving unit configured to receive the second request from the key unit;
• a second authentication unit configured to perform authentication based on the second authentication information included in the second request, when the second receiving unit receives the second request;
• and
• a locking and unlocking unit configured to lock or unlock the vehicle or the facilities when the authentication by the second authentication unit is successful.

A key unit that is arranged inside a vehicle or facilities and sends a second request to a locking and unlocking device in response to a first request sent from a portable terminal to lock or unlock the vehicle or the facilities, the locking and unlocking device being installed in the vehicle or the facilities, the second request requesting the locking or the unlocking of the vehicle or the facilities, the key unit comprising:

• a receiving unit configured to receive the first request from the portable terminal, the first request including first authentication information;
• a storage unit configured to store encrypted second authentication information, the second authentication information being associated with the vehicle or facilities;
• an authentication unit configured to perform authentication based on the first authentication information included in the first request when the receiving unit receives the first request;
• a decryption unit configured to decrypt the second authentication information when the authentication by the authentication unit is successful;
• and
• a sending unit configured to send the second request to the locking and unlocking device, the second request including the second authentication information decrypted by the decryption unit.

A key unit that is arranged inside a vehicle or facilities and sends a second request to a locking and unlocking device in response to a first request sent from a portable terminal to lock or unlock the vehicle or the facilities, the locking and unlocking device being installed in the vehicle or the facilities, the second request requesting the locking or the unlocking of the vehicle or the facilities, the key unit comprising:

• a receiving unit configured to receive the first request from the portable terminal, the first request including first authentication information;
• a storage unit configured to store second authentication information, the second authentication information being associated with the vehicle or facilities;
• an authentication unit configured to perform authentication based on the first authentication information included in the first request when the receiving unit receives the first request;
• an access management unit configured to change the second authentication information in the storage unit from an inaccessible state to an accessible state when the authentication by the authentication unit is successful;
• and
• a sending unit configured to send a second request to the locking and unlocking device, the second request including the second authentication information.