IMPROVED REDUNDANCY PROTECTION BY WAY OF CLONING STATEFUL PRIVATE KEYS SUITABLE FOR PROTECTING AGAINST QUANTUM COMPUTER ATTACKS USING AN HSM - Patent 4799323

(19)

(11)

EP 4 799 323 A2

(12)

(88)	Date of publication A3:
	11.12.2025

(43)	Date of publication:
	02.09.2026 Bulletin 2026/36

(21)	Application number: 24936189.0

(22)	Date of filing: 18.10.2024

(51)

International Patent Classification (IPC):

H04L 9/08^(2006.01)

H04L 9/32^(2006.01)

(52)	Cooperative Patent Classification (CPC):
	H04L 9/085; H04L 9/3247; H04L 9/0825; H04L 9/0836

(86)	International application number:
	PCT/US2024/051873

(87)	International publication number:
	WO 2025/239916 (20.11.2025 Gazette 2025/47)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA
	Designated Validation States:
	GE KH MA MD TN

(30)

Priority:

25.10.2023 EP 23205922

(71)	Applicant: THALES DIS CPL USA, INC.
	Austin, TX 78759 (US)

(72)	Inventor:
	PATCHELL, Jonathan 13705 La Ciotat (FR)

(74)	Representative: Grevin, Emmanuel
	Thales Dis France SAS Intellectual Property Department Avenue du Jujubier, Z.I. Athélia IV 13705 La Ciotat 13705 La Ciotat (FR)

(54)	IMPROVED REDUNDANCY PROTECTION BY WAY OF CLONING STATEFUL PRIVATE KEYS SUITABLE FOR PROTECTING AGAINST QUANTUM COMPUTER ATTACKS USING AN HSM