US 11,811,922 B2
Key generation device, a vehicle-internal communication system, and a method for the vehicle-internal management of cryptographic keys
Marc Sebastian Patric Stöttinger, Oestrich-Winkel (DE); and Patrick Thomas Michael Klapper, Weiterstadt (DE)
Assigned to Continental Teves AG & Co. OHG, Frankfurt am Main (DE)
Filed by Continental Teves AG & Co. OHG, Frankfurt am Main (DE)
Filed on Feb. 3, 2021, as Appl. No. 17/248,701.
Application 17/248,701 is a continuation of application No. PCT/EP2019/070139, filed on Jul. 25, 2019.
Claims priority of application No. 10 2018 213 038.8 (DE), filed on Aug. 3, 2018.
Prior Publication US 2021/0167956 A1, Jun. 3, 2021
Int. Cl. H04L 9/08 (2006.01)
CPC H04L 9/0861 (2013.01) [H04L 9/0819 (2013.01); H04L 9/0891 (2013.01); H04L 9/0897 (2013.01); H04L 2209/84 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for the vehicle-internal management of cryptographic keys comprising:
providing at least one secret for a vehicle-internal key generation device;
generating at least one new cryptographic key by the vehicle-internal key generation device on the basis of the at least one secret, the at least one new cryptographic key replacing an old cryptographic key; and
providing at least one new cryptographic key to a first vehicle-internal control device and a second vehicle-internal control device, wherein the first vehicle-internal control device and the second vehicle-internal control device are configured to replace the old cryptographic key with the at least one new cryptographic key and perform secured communication between each other secured using the at least one new cryptographic key,
wherein the generation of the at least one new cryptographic key and the providing of the at least one new cryptographic key takes place autonomously triggered by one of:
one of an environmental change and a security event.