THRESHOLD CRYPTOGRAPHY SCHEME FOR CONDITIONAL ACCESS SYSTEMS - Patent 1348276

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EP 1 348 276 A2

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(88)	Date of publication A3:
	06.09.2002

(43)	Date of publication:
	01.10.2003 Bulletin 2003/40

(21)	Application number: 01977153.4

(22)	Date of filing: 24.09.2001

(51)	International Patent Classification (IPC)⁷: H04L 9/08, H04N 7/167

(86)	International application number:
	PCT/US0129/790

(87)	International publication number:
	WO 0204/5337 (06.06.2002 Gazette 2002/23)

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

29.11.2000 US 253781 P

(71)	Applicant: Thomson Licensing S.A.
	92648 Boulogne Cedex (FR)

(72)	Inventor:
	ESKICIOGLU, Ahmet, Mursit Indianapolis, IN 46250-4607 (US)

(74)	Representative: Berthier, Karine
	Thomson multimedia European Patent Operations 46 Quai A. Le Gallo 92648 Boulogne Cédex 92648 Boulogne Cédex (FR)

(54)	THRESHOLD CRYPTOGRAPHY SCHEME FOR CONDITIONAL ACCESS SYSTEMS