(19)

(11)

EP 1 190 523 A1

(12)

(43) Date of publication: 27.03.2002 Bulletin 2002/13 (21) Application number: 00957240.5 (22) Date of filing: 03.05.2000

(51) International Patent Classification (IPC)7: H04L 9/00, H04L 9/30 (86) International application number: PCT/US0012/025 (87) International publication number: WO 0101/625 (04.01.2001 Gazette 2001/01)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 03.05.1999 US 132199 P (71) Applicant: NTRU Cryptosystems, Inc. Burlington, MA 01803 (US)	(72) Inventors: HOFFSTEIN, Jeffrey Pawtucket, RI 02860 (US) SILVERMAN, Joseph, H. Needham, MA 02192 (US) LIEMAN, Daniel Colombia, MO 65201 (US) (74) Representative: Skone James, Robert Edmund et al GILL JENNINGS & EVERYBroadgate House7 Eldon Street London EC2M 7LH London EC2M 7LH (GB)