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

Claim 2:
3. The vehicle digital key sharing service method of claim 2, wherein the step of registering the digital key in a mobile terminal-based relay mode comprises: receiving and storing, by the mobile terminal accessing the management server through the dedicated application, a server public key from the management server and generating a terminal public key and a terminal private key;
forwarding, by the mobile terminal, the terminal public key to the vehicle device and decrypting encrypted vehicle information using the terminal private key after receiving the vehicle information encrypted using the terminal public key from the vehicle device; encrypting, by the mobile terminal, the vehicle information and terminal information using the server public key and then transmitting the encrypted vehicle information and terminal information to the management server; decrypting, by the management server, the information received from the mobile terminal, encrypting the digital key using each of a vehicle public key included in the vehicle information and the terminal public key included in the terminal information, and transmitting the encrypted digital keys to the mobile terminal; receiving, by the mobile terminal, the encrypted vehicle digital key and the encrypted terminal digital key from the management server, transmitting the vehicle digital key to the vehicle device, decrypting the terminal digital key, and storing the decrypted terminal digital key in the secure world; and receiving, by the vehicle device, the vehicle digital key and decrypting and storing the vehicle digital key.