METHOD AND APPARATUS FOR WRITING AND USING KEYS FOR ENCRYPTING/DECRYPTING A CONTENT AND A RECORDING MEDIUM STORING KEYS WRITTEN BY THE METHOD - Patent 1825470

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EP 1 825 470 A1

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(43)	Date of publication:
	29.08.2007 Bulletin 2007/35

(21)	Application number: 05823731.4

(22)	Date of filing: 06.12.2005

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International Patent Classification (IPC):

G11B 20/10^(2006.01)

(86)	International application number:
	PCT/KR2005/004146

(87)	International publication number:
	WO 2006/065034 (22.06.2006 Gazette 2006/25)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

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Priority:

13.12.2004 US 634998 P
23.12.2004 US 638332 P
05.11.2005 KR 20050105754

(71)	Applicant: LG Electronics, Inc.
	Seoul 150-010 (KR)

(72)	Inventors:
	PARK, Sung Wan Jangan-gu, Suwon-si 440-300 (KR) KIM, Byung Jin Bundang-gu, Sungnam, Kyunggi-do 463-010 (KR) SEO, Kang Soo Dongan-gu, Anyang, Kyunggi-do 431-075 (KR)

(74)	Representative: Vossius & Partner
	Siebertstrasse 4 81675 München 81675 München (DE)

(54)	METHOD AND APPARATUS FOR WRITING AND USING KEYS FOR ENCRYPTING/DECRYPTING A CONTENT AND A RECORDING MEDIUM STORING KEYS WRITTEN BY THE METHOD