(19)

(11)

EP 1 171 833 A1

(12)

(43) Date of publication: 16.01.2002 Bulletin 2002/03 (21) Application number: 01908703.0 (22) Date of filing: 25.01.2001

(51) International Patent Classification (IPC)7: G06F 17/00 (86) International application number: PCT/US0102/518 (87) International publication number: WO 0154/476 (02.08.2001 Gazette 2001/31)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (30) Priority: 27.01.2000 US 178484 P 19.05.2000 US 575088 (71) Applicant: Verisign, Inc. Mountain View, CA 94043 (US)	(72) Inventor: GUINAN, Daniel Redwood Shores, CA 94065 (US) (74) Representative: Hanna, Peter William Derek et al Peter Hanna Associates 11 Mespil Road Dublin 4 Dublin 4 (IE)