PROTECTING CONTENT FROM ILLICIT REPRODUCTION BY PROOF OF EXISTENCE OF A COMPLETE DATA SET - Patent 1314156

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EP 1 314 156 A2

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(88)	Date of publication A3:
	13.03.2003

(43)	Date of publication:
	28.05.2003 Bulletin 2003/22

(21)	Application number: 01916964.8

(22)	Date of filing: 30.01.2001

(51)	International Patent Classification (IPC)⁷: G11B 20/00

(86)	International application number:
	PCT/EP0100/979

(87)	International publication number:
	WO 0105/7869 (09.08.2001 Gazette 2001/32)

(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:

01.02.2000 US 178955 P
28.03.2000 US 537815

(71)	Applicant: Koninklijke Philips Electronics N.V.
	5621 BA Eindhoven (NL)

(72)	Inventor:
	EPSTEIN, Michael, A. NL-5656 AA Eindhoven (NL)

(74)	Representative: Deguelle, Wilhelmus Hendrikus Gerardus
	INTERNATIONAAL OCTROOIBUREAU B.V.,Prof. Holstlaan 6 5656 AA Eindhoven 5656 AA Eindhoven (NL)

(54)	PROTECTING CONTENT FROM ILLICIT REPRODUCTION BY PROOF OF EXISTENCE OF A COMPLETE DATA SET