US 12,267,412 B2
Technologies for secure inter-processor communications
Brian Gilchrist, Golden, CO (US); Joseph W. Baumgarte, Carmel, IN (US); Gregory Ross, Carmel, IN (US); Terry Small, Indianapolis, IN (US); and Aaron Schlicht, Golden, CO (US)
Assigned to Schlage Lock Company LLC, Carmel, IN (US)
Filed by Schlage Lock Company LLC, Carmel, IN (US)
Filed on Apr. 22, 2022, as Appl. No. 17/727,402.
Prior Publication US 2023/0344621 A1, Oct. 26, 2023
Int. Cl. H04L 9/08 (2006.01); H04L 9/06 (2006.01); H04L 9/12 (2006.01)
CPC H04L 9/0825 (2013.01) [H04L 9/0643 (2013.01); H04L 9/0877 (2013.01); H04L 9/0891 (2013.01); H04L 9/12 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An electronic lock configured to be secured to a door having an exterior side and an interior side, the electronic lock comprising:
an exterior escutcheon on the exterior side of the door;
an interior escutcheon on the interior side of the door;
a digital core printed circuit board assembly (PCBA) positioned within the interior escutcheon, wherein the digital core PCBA comprises at least one first processor and at least one first memory and is configured to facilitate wireless communications, wherein the at least one first memory is provisioned with a master initialization salt key; and
an access core PCBA electrically coupled to the digital core PCBA and positioned within the exterior escutcheon, wherein the access core PCBA comprises at least one second processor and at least one second memory and is configured to facilitate access control, wherein the at least one second memory is provisioned with an access core initialization key derived from the master initialization salt key;
wherein the digital core PCBA establishes a secure communication channel with the access core PCBA via an electrical connection between the digital core PCBA and the access core PCBA based on the master initialization salt key and the access core initialization key;
wherein the at least one first processor of the digital core PCBA generates the access core initialization key based on a unique identifier of the access core and the master initialization salt key; and
wherein each of the at least one first processor of the digital core PCBA and the at least one second processor of the access core PCBA generates a set of operational keys based on the access core initialization key.