(19)
(11) EP 1 374 009 A2

(12)

(88) Date of publication A3:
02.10.2003

(43) Date of publication:
02.01.2004 Bulletin 2004/01

(21) Application number: 01945301.8

(22) Date of filing: 22.06.2001
(51) International Patent Classification (IPC)7: G06F 1/00
(86) International application number:
PCT/EP2001/007090
(87) International publication number:
WO 2002/001271 (03.01.2002 Gazette 2002/01)
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

(30) Priority: 29.06.2000 US 606339

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

(72) Inventors:
  • KRASINSKI, Raymond
    NL-5656 AA Eindhoven (NL)
  • ROSNER, Martin
    NL-5656 AA Eindhoven (NL)

(74) Representative: Groenendaal, Antonius Wilhelmus Maria 
PhilipsIntellectual Property & StandardsP.O. Box 220
5600 AE Eindhoven
5600 AE Eindhoven (NL)

   


(54) MULTIPLE ENCRYPTION OF A SINGLE DOCUMENT PROVIDING MULTIPLE LEVEL ACCESS PRIVILEGES