Device, a Key Card and a Method for Deleting a Shared Digital Key from a Key Card

A key card configured to store a shared digital key which is enabled for controlling one or more vehicle functions of a vehicle, the key card comprising one or more processors configured to:

• receive a request for terminating a digital key endpoint for the shared digital key on the key card;
• send a termination attestation which indicates that the digital key endpoint has been terminated;
• receive a request for deletion of the digital key endpoint from a memory slot of a storage area of the key card, wherein the request comprises a deletion confirmation indicative of the deletion of the shared digital key from a key tracking server;
• verify the deletion confirmation;
• and
• delete the digital key endpoint in dependence of the verification of the deletion confirmation.

A method for interacting with a shared digital key which is enabled for controlling one or more vehicle functions of a vehicle, wherein the shared digital key is stored on a key card, the method comprising:

• causing termination of a digital key endpoint for the shared digital key on the key card;
• receiving a termination attestation from the key card, wherein the termination attestation indicates that the digital key endpoint has been terminated;
• causing deletion of the shared digital key from a key tracking server for tracking keys;
• and
• subject to causing deletion of the shared digital key on the key tracking server, causing deletion of the digital key endpoint from a memory slot of a storage area of the key card.

A method for deleting a shared digital key which is enabled for controlling one or more vehicle functions of a vehicle, the method comprising:

• receiving a request for terminating a digital key endpoint for the shared digital key on the key card;
• sending a termination attestation which indicates that the digital key endpoint has been terminated;
• receiving a request for deletion of the digital key endpoint from a memory slot of a storage area of the key card, wherein the request comprises a deletion confirmation indicative of the deletion of the shared digital key from a key tracking server;
• verifying the deletion confirmation;
• and
• deleting the digital key endpoint in dependence of the verification of the deletion confirmation.