US 12,445,852 B2
System and method to improve encrypted transmissions between nodes
Jakob Buron, Søborg (DK); Anders Lynge Esbensen, København NV (DK); and Jonas Roum-Møller, Hørsholm (DK)
Assigned to Silicon Laboratories Inc., Austin, TX (US)
Filed by Silicon Laboratories Inc., Austin, TX (US)
Filed on Sep. 8, 2022, as Appl. No. 17/940,541.
Application 17/940,541 is a continuation of application No. 17/212,488, filed on Mar. 25, 2021, granted, now 11,477,653.
Claims priority of provisional application 63/133,876, filed on Jan. 5, 2021.
Prior Publication US 2023/0007489 A1, Jan. 5, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 12/03 (2021.01); H04W 12/106 (2021.01); H04W 12/122 (2021.01); H04W 12/61 (2021.01); H04W 56/00 (2009.01)
CPC H04W 12/122 (2021.01) [H04W 12/03 (2021.01); H04W 12/106 (2021.01); H04W 12/61 (2021.01); H04W 56/001 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method of minimizing a risk of a delay attack between a first node and a second node transmitting encrypted packets, comprising:
creating, in the first node and the second node, an initial value for a first nonce value used for transmissions from the first node to the second node;
updating, at the first node, the first nonce value whenever a packet destined for the second node is successfully transmitted; and
updating, at the second node, the first nonce value whenever a packet from the first node is successfully received;
wherein the first nonce value is used by the first node to encrypt packets transmitted to the second node and by the second node to decrypt packets received from the first node; and
initiating a resynchronization process based on a predetermined parameter, wherein the resynchronization process resets security parameters associated with the first node and the second node.