US 12,244,691 B2
Secure installation of application keys
Jean-Bernard Fischer, Cheseaux-sur-Lausanne (CH); Nicolas Fischer, Cheseaux-sur-Lausanne (CH); Fabien Gremaud, Cheseaux-sur-Lausanne (CH); and Karine Villegas, Cheseaux-sur-Lausanne (CH)
Assigned to NAGRAVISION SÀRL, Cheseaux-sur-Lausanne (CH)
Filed by NAGRAVISION SARL, Cheseaux-sur-Lausanne (CH)
Filed on Dec. 15, 2023, as Appl. No. 18/542,551.
Application 18/542,551 is a continuation of application No. 17/941,909, filed on Sep. 9, 2022, granted, now 11,876,895.
Application 17/941,909 is a continuation of application No. 16/958,104, granted, now 11,496,292, issued on Nov. 8, 2022, previously published as PCT/EP2018/086576, filed on Dec. 21, 2018.
Claims priority of application No. 17306983 (EP), filed on Dec. 29, 2017.
Prior Publication US 2024/0250805 A1, Jul. 25, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 9/08 (2006.01); H04L 9/14 (2006.01)
CPC H04L 9/0822 (2013.01) [H04L 9/0825 (2013.01); H04L 9/083 (2013.01); H04L 9/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of preparing an application key owned by an application owner device for installation in a remote device, the method comprising:
sending a device public key to the application owner device, the device public key corresponding to a device private key stored on and specific to the remote device;
receiving an encrypted application key for an application associated with the application owner device, the encrypted application key being encrypted with the device public key; and
processing the received encrypted application key with a symmetric device key, wherein the symmetric device key is specific to and stored on the remote device,
wherein the application key is prepared at a key management system.