COPY-POTECTION ON A STORAGE MEDIUM BY RANDOMIZING LOCATIONS AND KEYS UPON WRITE ACCESS - Patent 1076857

(19)

(11)

EP 1 076 857 A1

(12)

(43)	Date of publication:
	21.02.2001 Bulletin 2001/08

(21)	Application number: 00918799.8

(22)	Date of filing: 14.03.2000

(51)	International Patent Classification (IPC)⁷: G06F 12/14, G11B 20/00, G11B 20/12

(86)	International application number:
	PCT/EP0002/276

(87)	International publication number:
	WO 0055/736 (21.09.2000 Gazette 2000/38)

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

(30)

Priority:

15.03.1999 EP 99200776

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

(72)	Inventor:
	STARING, Antonius, A., M. NL-5656 AA Eindhoven (NL)

(74)	Representative: Faessen, Louis Marie Hubertus
	INTERNATIONAAL OCTROOIBUREAU B.V.,Prof. Holstlaan 6 5656 AA Eindhoven 5656 AA Eindhoven (NL)

(54)	COPY-POTECTION ON A STORAGE MEDIUM BY RANDOMIZING LOCATIONS AND KEYS UPON WRITE ACCESS