METHOD SECURED AGAINST SIDE-CHANNEL ATTACKS WITH A NEW MASKING SCHEME PROTECTING LINEAR OPERATIONS OF A CRYPTOGRAPHIC ALGORITHM - Patent 3931999

(19)

(11)

EP 3 931 999 A1

(12)

(43)	Date of publication:
	05.01.2022 Bulletin 2022/01

(21)	Application number: 20701829.2

(22)	Date of filing: 31.01.2020

(51)

International Patent Classification (IPC):

H04L 9/00^(2006.01)

(52)	Cooperative Patent Classification (CPC):
	H04L 2209/16; H04L 2209/043; H04L 9/002

(86)	International application number:
	PCT/EP2020/052495

(87)	International publication number:
	WO 2020/173662 (03.09.2020 Gazette 2020/36)

(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 MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME
	Designated Validation States:
	KH MA MD TN

(30)

Priority:

27.02.2019 EP 19305233

(71)	Applicant: Thales DIS France SA
	92190 Meudon (FR)

(72)	Inventor:
	JELJELI, Hamza 92190 Meudon (FR)

(74)	Representative: Bricks, Amélie
	Thales Dis France SA Intellectual Property Department 6, rue de la Verrerie 92190 Meudon 92190 Meudon (FR)

(54)	METHOD SECURED AGAINST SIDE-CHANNEL ATTACKS WITH A NEW MASKING SCHEME PROTECTING LINEAR OPERATIONS OF A CRYPTOGRAPHIC ALGORITHM