(19)

(11)

EP 1 552 634 A1

(12)

(43) Date of publication: 13.07.2005 Bulletin 2005/28 (21) Application number: 03808968.6 (22) Date of filing: 04.09.2003

(51) International Patent Classification (IPC)7: H04K 1/00, H04L 9/00 (86) International application number: PCT/US2003/027614 (87) International publication number: WO 2004/036802 (29.04.2004 Gazette 2004/18)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 16.10.2002 US 272073 (71) Applicant: MICROSOFT CORPORATION Redmond, WA 98052 (US)	(72) Inventors: KIROVSKI, Darko Bellevue, WA 98007 (US) JOJIC, Nebojsa Redmond, WA 98052 (US) (74) Representative: Grünecker, Kinkeldey, Stockmair & SchwanhäusserAnwaltssozietät  Maximilianstrasse 58 80538 München 80538 München (DE)