US 12,081,645 B2
Instantaneous key invalidation in response to a detected eavesdropper
Leigh Griffin, Waterford (IE); and Stephen Coady, Waterford (IE)
Assigned to Red Hat, Inc., Raleigh, NC (US)
Filed by Red Hat, Inc., Raleigh, NC (US)
Filed on Feb. 21, 2022, as Appl. No. 17/676,593.
Application 17/676,593 is a continuation of application No. 16/592,878, filed on Oct. 4, 2019, granted, now 11,258,580.
Prior Publication US 2022/0247549 A1, Aug. 4, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 9/00 (2022.01); G06N 10/00 (2022.01); H04L 9/08 (2006.01); H04L 9/40 (2022.01)
CPC H04L 9/002 (2013.01) [G06N 10/00 (2019.01); H04L 9/0852 (2013.01); H04L 9/0891 (2013.01); H04L 63/107 (2013.01); H04L 63/20 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method comprising:
generating, by a quantum computing system comprising a plurality of qubits and a quantum channel using a quantum key distribution protocol, a key;
determining, by the quantum computing system, that an eavesdropper has eavesdropped on the quantum channel;
determining, by the quantum computing system, an estimated amount of the key ascertained by the eavesdropper; and
in response to determining that the eavesdropper has eavesdropped on the quantum channel, sending a key-revocation message and the estimated amount of the key ascertained by the eavesdropper to a designated destination.