(19)

(11)

EP 2 171 962 A2

(12)

(88) Date of publication A3: 22.05.2009 (43) Date of publication: 07.04.2010 Bulletin 2010/14 (21) Application number: 08775507.0 (22) Date of filing: 23.06.2008

(51) International Patent Classification (IPC):  H04L 29/06(2006.01) (86) International application number: PCT/FI2008/050382 (87) International publication number: WO 2009/000968 (31.12.2008 Gazette 2009/01)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 25.06.2007 FI 20075484 (71) Applicant: EADS Secure Networks Oy 00380 Helsinki (FI)	(72) Inventor: LEHTONEN, Juha FI-02430 Masala (FI) (74) Representative: Keinänen, Anu  Kolster Oy Ab P.O.Box 148 (Iso Roobertinkatu 23) 00121 Helsinki 00121 Helsinki (FI)