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

Claim 4:
5. An authorization method performed by an authorization system including a non-representative guest terminal, a representative guest terminal, a host terminal, a management server, and a smart lock, the authorization method comprising:
at the representative guest terminal, acquiring information about the non-representative guest terminal from the non-representative guest terminal, and when a representative guest confirms information about a non-representative guest, signing information about the representative guest terminal and the information about the non-representative guest terminal acquired to transmit the information to the host terminal;
at the host terminal, acquiring information about the representative guest and the information about the representative guest terminal and the information about the non-representative guest terminal that are signed from the representative guest terminal, verifying the information about the representative guest terminal and the information about the non-representative guest terminal that are signed when a host confirms the information about the representative guest, and signing the information about the representative guest terminal and the information about the non-representative guest terminal that are proven to be authentic by the verification to transmit the information together with information about the host terminal to the management server;
at the management server, acquiring from the host terminal, information about the host terminal and the information about the representative guest terminal and the information about the non-representative guest terminal that are signed, verifying the information about the representative guest terminal and the information about the non-representative guest terminal that are signed, performing authentication based on the information about the host terminal acquired and information about the host terminal registered in advance when the information is proven to be authentic by the verification, and registering the information about the representative guest terminal and the information about the non-representative guest terminal when the authentication is successful; and
at the management server, acquiring information about a terminal from the smart lock, performing 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 unlocking the smart lock depending on a result of the authentication.