(19)
(11) EP 1 157 321 B8

(12) CORRECTED EUROPEAN PATENT SPECIFICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 B1)

(48) Corrigendum issued on:
16.09.2009 Bulletin 2009/38

(45) Mention of the grant of the patent:
05.08.2009 Bulletin 2009/32

(21) Application number: 00906466.8

(22) Date of filing: 24.02.2000
(51) International Patent Classification (IPC): 
G06F 1/00(2006.01)
 H04L 29/06(2006.01)
(86) International application number:
PCT/GB2000/000661
(87) International publication number:
WO 2000/052557 (08.09.2000 Gazette 2000/36)

(54)

MUTUAL AUTHENTICATION IN A DATA NETWORK USING AUTOMATIC INCREMENTAL CREDENTIAL DISCLOSURE

GEGENSEITIGE AUTHENTIFIZIERUNG IN EINEM DATENNETZ UNTER VERWENDUNG EINER AUTOMATISCH ZUNEHMENDEN OFFENLEGUNG VON LEGALISIERUNGSDATEN

AUTHENTIFICATION RECIPROQUE DANS UN RESEAU DE DONNEES AU MOYEN DE LA DIVULGATION DE REFERENCES A INCREMENTATION AUTOMATIQUE

(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU NL PT SE

(30) Priority: 02.03.1999 US 260249

(43) Date of publication of application:
28.11.2001 Bulletin 2001/48

(73) Proprietor: International Business Machines Corporation
Armonk, NY 10504 (US)

(72) Inventors:
  • Seamons, Kent Eldon
    Wexford, PA 15090 (US)
  • Winsborough, William Hale
    Pittsburgh, PA 15232 (US)

(74) Representative: Burt, Roger James 
IBM United Kingdom Limited, Intellectual Property Law, MP 110, Hursley Park, Hursley
Winchester, Hampshire SO21 2JN
Winchester, Hampshire SO21 2JN (GB)


(56) References cited: : 
EP-A- 0 505 302
WO-A-98/07085
 EP-A- 0 580 350
US-A- 5 473 689
   
  • M. WINSLETT, N. CHING, V. JONES, I. SLEPCHIN: "Using digital credentials on the World Wide Web" JOURNAL OF COMPUTER SECURITY, vol. 5, no. 3, 1997, pages 255-267, XP000920816
   
Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).