Patent ID: 11968525
Assignee: KSMARTECH CO., LTD
Field: Digital communication (Electrical engineering)
Classification: CPC H  B  G | IPC B  G  H

Claim 0:
1. A vehicle digital key sharing service method comprising:
a digital registration step in which a management server generates a terminal digital key and a vehicle digital key after user authentication in response to a digital key registration request through a dedicated application of a mobile terminal and the mobile terminal stores the terminal digital key in a secure world that is separated from a normal world;
a digital key using step in which an authentication token is generated using the terminal digital key stored in the secure world when the mobile terminal approaches or tags a vehicle, and a vehicle device locks or unlocks a door of the vehicle by activating the vehicle digital key, which is registered from the management server, to validate the authentication token;
a step in which a digital key sharing mode is activated via a dedicated application of a master terminal used by a primary user who owns a digital key, a restriction on unlock authority for the vehicle device is set by performing identification verification and authentication, and a digital key to which a restriction value is applied is shared with a shared terminal used by a sharer; and
wherein the step of sharing the digital key comprises:
receiving, by the master terminal, an input selection of a menu for sharing a digital key through the dedicated application;
performing a primary authentication process for a door key sharing service with an identity verification means stored in the secure world through the dedicated application of the master terminal;
performing a secondary authentication process for a door key sharing service using a compound authentication method in which authentication is performed via an identity verification means in the management server through the dedicated application of the master terminal;
generating a restriction value for the digital key stored in a secure world of the master terminal;
forwarding, by the master terminal, the digital key and the restriction value for the digital key to a shared terminal to share the digital key;
storing, by the shared terminal, the digital key received from the master terminal; and
forwarding, by the master terminal, a result of sharing to the management server.