US 11,856,110 B2
Method for delegated key sharing for digital car key system
Jinzhu Chen, Troy, MI (US); Fan Bai, Ann Arbor, MI (US); John Sergakis, Bloomfield Hills, MI (US); and Thomas E. Utter, Royal Oak, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM Global Technology Operations LLC, Detroit, MI (US)
Filed on Jan. 21, 2021, as Appl. No. 17/154,181.
Prior Publication US 2022/0231862 A1, Jul. 21, 2022
Int. Cl. H04L 9/32 (2006.01); H04W 4/44 (2018.01); B60R 25/01 (2013.01); B60R 25/24 (2013.01)
CPC H04L 9/3263 (2013.01) [B60R 25/01 (2013.01); B60R 25/24 (2013.01); H04L 9/3247 (2013.01); H04W 4/44 (2018.02)] 18 Claims
OG exemplary drawing
 
1. A method of sharing a digital key for a vehicle, comprising:
sending a list of entitlements from a first digital key device to a vehicle server, the first digital key device having the digital key stored thereon;
receiving from the vehicle server an active entitlement;
generating a sharing entitlement at the first digital key device that does not conflict with the active entitlement;
sending a request for a key sharing session from the first digital key device to the vehicle server;
commencing the key sharing session at the vehicle server;
sharing the digital key from the first digital key device to a second digital key device;
sending a track key signal from the second digital key device to the vehicle server;
validating the sharing entitlement at the vehicle server; and
ending the key sharing session at the vehicle server.