(19)
(11) EP 1 701 283 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:
30.08.2017 Bulletin 2017/35

(45) Mention of the grant of the patent:
19.04.2017 Bulletin 2017/16

(21) Application number: 06110218.2

(22) Date of filing: 21.02.2006
(51) International Patent Classification (IPC): 
G06F 21/44(2013.01)

(54)

Method and System for Asymmetric Key Security

Verfahren und System zur asymmetrischen Schlüssel Sicherheit

Méthode et système mettant en ouvre une system de sécurité a clé asymétrique

(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

(30) Priority: 07.03.2005 US 74885

(43) Date of publication of application:
13.09.2006 Bulletin 2006/37

(73) Proprietor: Zhigu Holdings Limited
George Town, Grand Cayman KY1-1002 (KY)

(72) Inventors:
  • Bortz, Andrew
    Redmond, WA 98052 (US)
  • Nanda, Arun K.
    Redmond, WA 98052 (US)
  • Simon, Daniel R.
    Redmond, WA 98052 (US)
  • Shewchuk, John P.
    Redmond, WA 98052 (US)
  • Benaloh, Josh D.
    Redmond, WA 98052 (US)
  • Cameron, Kim
    Redmond, WA 98052 (US)

(74) Representative: Grünecker Patent- und Rechtsanwälte PartG mbB 
Leopoldstraße 4
80802 München
80802 München (DE)


(56) References cited: : 
EP-A- 1 478 121
   
  • ZHANG N ET AL: "Anonymous public-key certificates for anonymous and fair document exchange" IEE PROCEEDINGS : COMMUNICATIONS, INSTITUTION OF ELECTRICAL ENGINEERS, GB, vol. 147, no. 6, 11 December 2000 (2000-12-11), pages 345-350, XP006014002 ISSN: 1350-2425
  • MENEZES A ET AL: "Handbook of Applied Cryptography , IDENTIFICATION AND ENTITY AUTHENTICATION" HANDBOOK OF APPLIED CRYPTOGRAPHY, CRC PRESS SERIES ON DISCRETE MATHEMATICES AND ITS APPLICATIONS, BOCA RATON, FL, CRC PRESS, US, 1997, pages 385-424, XP002262234 ISBN: 0-8493-8523-7
   
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).