Content protection and copy management system for a network

(19)

(11)

EP 1 304 844 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION

(48)	Corrigendum issued on:
	23.07.2003 Bulletin 2003/30

(43)	Date of publication:
	23.04.2003 Bulletin 2003/17

(21)	Application number: 01124994.3

(22)	Date of filing: 19.10.2001

(51)	International Patent Classification (IPC)⁷: H04L 29/06, G06F 1/00

(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

(71)	Applicants:
	Sony International (Europe) GmbH 10785 Berlin (DE) Sony United Kingdom Limited Weybridge, Surrey KT13 0XW (GB) SONY CORPORATION Tokyo 141 (JP)

(72)	Inventors:
	Szucs, Paul, c/o Adv.Tech.Center,Sony Int.GmbH 70327 Stuttgart (DE) Spalink, Gerd, c/o Adv.Tech.Center,Sony Int.GmbH 70327 Stuttgart (DE) Schwager,Andreas,c/o Adv.Tech.Center,Sony Int.GmbH 70327 Stuttgart (DE) Barry, Richard. c/o Sony NPE Hampshire RG22 4SB (GB) Sato, Masahiko, Sony Corporation Tokyo 141-0001 (JP)

(74)	Representative: Müller - Hoffmann & Partner
	Patentanwälte, Innere Wiener Strasse 17 81667 München 81667 München (DE)

(54)	Content protection and copy management system for a network

(57) A content protection and copy management system for a network is proposed which comprises at least one conditional access module within the network, respectively adapted to receive at least one encrypted content stream through the network, to decrypt a respective received encrypted content stream, and to apply a secure link encryption to each decrypted content stream before outputting it to the network.