(19)
(11) EP 1 847 060 A2

(12)

(43) Date of publication:
24.10.2007 Bulletin 2007/43

(21) Application number: 06718847.4

(22) Date of filing: 19.01.2006
(51) International Patent Classification (IPC): 
H04L 9/00(2006.01)
(86) International application number:
PCT/US2006/001839
(87) International publication number:
WO 2006/081122 (03.08.2006 Gazette 2006/31)
(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
Designated Extension States:
AL BA HR MK YU

(30) Priority: 27.01.2005 US 647482 P
12.09.2005 US 716177 P
07.11.2005 US 734331 P
23.12.2005 US 318381

(71) Applicant: INTERDIGITAL TECHNOLOGY CORPORATION
Wilmington, DE 19810 (US)

(72) Inventors:
  • RUDOLF, Marian
    Montreal, Québec H3J 2P3 (CA)
  • MUKHERJEE, Rajat, Pritam
    Montreal, Québec H2X 2E8 (CA)

(74) Representative: Engdahl, Stefan 
AWAPATENT AB P.O. Box 45086
104 30 Stockholm
104 30 Stockholm (SE)

   


(54) METHOD AND SYSTEM FOR DERIVING AN ENCRYPTION KEY USING JOINT RANDOMNESS NOT SHARED BY OTHERS