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(11)

EP 1 012 762 A1

(12)

(43) Date of publication: 28.06.2000 Bulletin 2000/26 (21) Application number: 97954503.5 (22) Date of filing: 03.12.1997

(51) International Patent Classification (IPC)7: G06F 17/60, H04L 9/32, G07F 7/10, H04L 9/30 (86) International application number: PCT/SG9700/065 (87) International publication number: WO 9825/220 (11.06.1998 Gazette 1998/23)

(84) Designated Contracting States: DE FR GB (30) Priority: 04.12.1996 SG 9611524 (71) Applicant: Kent Ridge Digital Labs (KRDL) Kent Ridge,Singapore 119597 (SG)	(72) Inventors: DENG, Huijie Singapore 127787 (SG) NGAIR, Teow-Hin Singapore 610334 (SG) (74) Representative: RACKETTE Partnerschaft Patentanwälte  Postfach 13 10 79013 Freiburg 79013 Freiburg (DE)