US 12,302,092 B2
Digital key derivation distribution between a secure element and ultra-wide band module
Pierre-Francois Appietto, Chateauneuf-le-Rouge (FR); Charles Nung Lo, San Diego, CA (US); and Brian A. Redding, Urbana, IL (US)
Assigned to Qualcomm Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Apr. 23, 2021, as Appl. No. 17/238,570.
Claims priority of provisional application 63/075,254, filed on Sep. 7, 2020.
Prior Publication US 2022/0078609 A1, Mar. 10, 2022
Int. Cl. H04L 29/06 (2006.01); H04W 12/03 (2021.01); H04W 12/041 (2021.01); H04W 12/06 (2021.01); H04W 76/10 (2018.01); H04W 4/80 (2018.01)
CPC H04W 12/041 (2021.01) [H04W 12/03 (2021.01); H04W 12/06 (2013.01); H04W 76/10 (2018.02); H04W 4/80 (2018.02)] 27 Claims
OG exemplary drawing
 
1. A method for wireless communications by a user equipment (UE), the method comprising:
maintaining an ultra-wideband (UWB) secret ranging key (URSK) in a secure element (SE) at the UE, wherein the URSK is maintained only in the SE and not allowed to be fetched from the SE;
fetching, from the SE, by a UWB module that manages a ranging session for the UE, one or more other keys derived from the URSK; and
using the one or more other keys to secure the ranging session between the UE and a second device.