US 12,328,573 B2
Salted key refreshment in wireless battery management systems
Archanaa Santhana Krishnan, Blacksburg, VA (US); Alexis Justine Burnight, Dallas, TX (US); and Ariton E. Xhafa, Plano, TX (US)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Aug. 30, 2021, as Appl. No. 17/461,887.
Prior Publication US 2023/0065059 A1, Mar. 2, 2023
Int. Cl. H04W 12/041 (2021.01); B60L 53/66 (2019.01); H04L 5/00 (2006.01)
CPC H04W 12/041 (2021.01) [B60L 53/66 (2019.02); H04L 5/0055 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method comprising:
receiving, from each of a plurality of secondary nodes communicably coupled to a primary node, a current session number;
comparing the current session numbers to a session number at the primary node to identify a mismatch;
generating a salt responsive to identifying the mismatch, the salt different from the current session number, the session number, and a key refreshment counter; and
sending the salt to each of the plurality of secondary nodes having a current session number matching the session number at the primary node.