US 11,974,123 B2
Encrypted communication between an appliance and a device on a motor vehicle
Sven Hofmann, Munich (DE); and Josef Wagenhuber, Gerolsbach (DE)
Assigned to Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
Appl. No. 17/427,967
Filed by Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
PCT Filed Jan. 31, 2020, PCT No. PCT/DE2020/100063
§ 371(c)(1), (2) Date Aug. 3, 2021,
PCT Pub. No. WO2020/177806, PCT Pub. Date Sep. 10, 2020.
Claims priority of application No. 10 2019 105 297.1 (DE), filed on Mar. 1, 2019.
Prior Publication US 2022/0030426 A1, Jan. 27, 2022
Int. Cl. H04W 12/0471 (2021.01); H04L 9/08 (2006.01); H04L 9/30 (2006.01); H04L 9/32 (2006.01); H04W 12/03 (2021.01); H04W 12/041 (2021.01)
CPC H04W 12/0471 (2021.01) [H04L 9/0844 (2013.01); H04L 9/3066 (2013.01); H04L 9/3236 (2013.01); H04W 12/03 (2021.01); H04W 12/041 (2021.01); H04L 2209/84 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method for authenticating an appliance to a motor vehicle, wherein the motor vehicle stores a first one-way hash of a password, and an encrypted value from a second one-way hash of the password, the method comprising:
performing a PACE (Password Authenticated Connection Establishment) method in order for the appliance and the motor vehicle to determine a same session key;
generating, by the motor vehicle, a communication key based on the session key and the encrypted value;
generating, by the appliance, the communication key based on the session key and the second one-way hash; and
conducting communication between the motor vehicle and the appliance, wherein the communication is encrypted based on the communication key.