Patent ID: 11956238
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H  E  G | IPC E  H

Claim 1:
2. An authorization system comprising:
a non-representative guest terminal;
a representative guest terminal;
a host terminal;
a management server; and
a smart lock, wherein
the non-representative guest terminal has an electronic certificate including information about a non-representative guest,
the representative guest terminal has an electronic certificate including information about a representative guest,
the non-representative guest terminal is configured to sign information about the non-representative guest terminal using the electronic certificate of the non-representative guest,
the representative guest terminal is configured to acquire information about the non-representative guest terminal that is signed and the electronic certificate of the non-representative guest from the non-representative guest terminal, verify the information about the non-representative guest terminal that is signed, by using the electronic certificate of the non-representative guest, and sign information about the representative guest terminal and the information about the non-representative guest terminal that is signed and proven to be authentic by the verification by using the electronic certificate of the representative guest,
the host terminal is configured to acquire from the representative guest terminal, the information about the representative guest terminal and the information about the non-representative guest terminal that are signed, as well as the electronic certificate of the representative guest and the electronic certificate of the non-representative guest, and verify the information about the representative guest terminal and the information about the non-representative guest terminal that are signed, by using the electronic certificate of the representative guest and the electronic certificate of the non-representative guest,
the management server is configured to acquire from the host terminal, the information about the representative guest terminal and the information about the non-representative guest terminal that are signed and are verified by the host terminal as well as the electronic certificate of the representative guest and the electronic certificate of the non-representative guest, verify the information about the representative guest terminal and the information about the non-representative guest terminal that are signed, by using the electronic certificate of the representative guest and the electronic certificate of the non-representative guest, and register the information about the representative guest terminal and the information about the non-representative guest terminal proven to be authentic by the verification, and
the management server is configured to information about a terminal from the smart lock, perform authentication based on the information about the representative guest terminal and the non-representative guest terminal registered and the information about the terminal acquired from the smart lock, and unlock the smart lock depending on a result of the authentication.