(19)

(11)

EP 1 714 460 A1

(12)

(43) Date of publication: 25.10.2006 Bulletin 2006/43 (21) Application number: 05701969.7 (22) Date of filing: 20.01.2005

(51) International Patent Classification (IPC):  H04L 29/06(2006.01) (86) International application number: PCT/GB2005/000206 (87) International publication number: WO 2005/071920 (04.08.2005 Gazette 2005/31)

(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 MC NL PL PT RO SE SI SK TR (30) Priority: 20.01.2004 GB 0401146 (71) Applicant: Reciva Limited 19 Sturton Street Cambridge, CB1 2SN (GB)	(72) Inventor: HUTCHISON, Giles, Rowland, Whitfield Cambridge CB4 8ED (GB) (74) Representative: Gosnall, Toby  Barker Brettell, 138 Hagley Road, Edgbaston Birmingham B16 9PW Birmingham B16 9PW (GB)