Method for unlocking vehicle door using mobile terminal

1. A method for unlocking a vehicle door using a mobile terminal, the method comprising:

authenticating, by a mobile key management server, a user and a smartphone of the user;

authenticating, by the mobile key management server, a vehicle having a door to be unlocked using the authenticated smartphone;

generating, by the mobile key management server, a mobile key issuance algorithm corresponding to the authenticated vehicle and smartphone;

issuing, by the mobile key management server, a mobile key, using the generated mobile key issuance algorithm, in response to a request from the smartphone;

receiving, at the mobile key management server, the issued mobile key via the smartphone and the vehicle;

confirming, by the mobile key management server, whether the issued mobile key matches the received mobile key; and

requesting, by the mobile key management server, the vehicle to unlock the door thereof, when the issued mobile key matches the received mobile key.

2. The method of claim 1 , wherein the mobile key comprises a virtual code configured to authorize the vehicle to unlock the door thereof.

3. The method of claim 1 , wherein the mobile key issuance algorithm is generated to be unique to the vehicle, based on information related to authentication of the vehicle.

4. The method of claim 1 , wherein the receiving of the issued mobile key includes:

transmitting, by the mobile key management server, the issued mobile key to the smartphone of the user;

transmitting, via a mobile key transmission server, the mobile key received at the smartphone to the vehicle; and

redirecting, by the vehicle, the mobile key received at the vehicle to the mobile key management server.

5. The method of claim 4 , wherein the transmitting of the mobile key received at the smartphone includes:

obtaining, by the smartphone, vehicle identification information which is unique to distinguish the vehicle from other vehicles from the vehicle;

transmitting, by the smartphone, the vehicle identification information and the received mobile key to the mobile key transmission server; and

identifying, by the mobile key transmission server, the vehicle, using the vehicle identification information and transmitting the mobile key to the identified vehicle.

6. The method of claim 5 , wherein the obtaining of the vehicle identification information comprises obtaining the vehicle identification information from a vehicle ID provider installed at the vehicle.

7. The method of claim 6 , wherein the vehicle ID provider is configured to transmit the vehicle identification information, in response to a predetermined manipulation on the smartphone.

8. The method of claim 7 , wherein the vehicle ID provider comprises a NFC tag configured to transmit the vehicle identification information to the smartphone when the smartphone approaches thereto.

9. The method of claim 1 , further comprising:

transmitting, by the mobile key management server, the issued mobile key to the vehicle via the smartphone; and

unlocking by the vehicle, the door thereof, upon receiving the transmitted mobile key.

10. The method of claim 1 , further comprising transmitting, by the mobile key management server, the generated mobile key issuance algorithm to the vehicle.

11. The method of claim 10 , further comprising:

transmitting, by the mobile key management server, the issued mobile key to the vehicle via the smartphone;

verifying, by the vehicle, the transmitted mobile key using the transmitted mobile key issuance algorithm; and

When the transmitted mobile key is verified, unlocking, by the vehicle, the door thereof.

12. The method of claim 11 , wherein the verifying of the transmitted mobile key includes:

generating, by the vehicle, a mobile key using the transmitted mobile key issuance algorithm; and

confirming, by the vehicle, whether the generated mobile key matches the transmitted mobile key.