METHOD FOR APPLYING A HIGH ENTROPY MASKING COUNTERMEASURE IN A BLOCK ENCRYPTION ALGORITHM, AND A LOGIC INTEGRATED CIRCUIT IMPLEMENTING SUCH A METHOD - Patent 2702720

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EP 2 702 720 A1

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(43)	Date of publication:
	05.03.2014 Bulletin 2014/10

(21)	Application number: 12721434.4

(22)	Date of filing: 20.04.2012

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International Patent Classification (IPC):

H04L 9/06^(2006.01)

H04L 9/00^(2006.01)

(86)	International application number:
	PCT/EP2012/057325

(87)	International publication number:
	WO 2012/146550 (01.11.2012 Gazette 2012/44)

(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

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Priority:

26.04.2011 FR 1153547

(71)	Applicant: Cassidian SAS
	78990 Elancourt (FR)

(72)	Inventors:
	THUILLET, Céline F-78960 VOISINS LE BRETONNEUX (FR) FRANCQ, Julien F-78210 SAINT CYR L'ECOLE (FR)

(74)	Representative: Pontet Allano & Associes
	Parc Les Algorithmes, Bâtiment Platon CS 70003 Saint Aubin 91192 Gif sur Yvette Cedex 91192 Gif sur Yvette Cedex (FR)

(54)	METHOD FOR APPLYING A HIGH ENTROPY MASKING COUNTERMEASURE IN A BLOCK ENCRYPTION ALGORITHM, AND A LOGIC INTEGRATED CIRCUIT IMPLEMENTING SUCH A METHOD