(19)
(11) EP 1 145 243 A2

(12)

(43) Date of publication:
17.10.2001 Bulletin 2001/42

(21) Application number: 99932846.1

(22) Date of filing: 07.07.1999
(51) International Patent Classification (IPC)7G11B 20/00
(86) International application number:
PCT/EP9904/766
(87) International publication number:
WO 0004/549 (27.01.2000 Gazette 2000/04)
(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: 14.07.1998 US 92727 P
15.06.1999 US 333628

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

(72) Inventor:
  • EPSTEIN, Michael, A.
    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)

 
Remarks:
WIPO A3 publication data is not currently available.
 


(54) COPY PROTECTION BY MESSAGE ENCRYPTION