Author Affiliations

Gilles Brassard,¹ Norbert Lütkenhaus,² Tal Mor,³ and Barry C. Sanders⁴

¹Département IRO, Université de Montréal, Québec, Canada H3C 3J7, Telephone: +1-514 343 6807; Fax: +1-514 343 5834

²Helsinki Institute of Physics, P.O.Box 9, 00014 Helsingin yliopisto, Finland, Telephone: +358/9/191-8502; Fax: +358/9/191-8366

³Department of Electrical Engineering, College of Judea and Somaria, Ariel, Israel 44837, Telephone: +972-3-9065198; Fax: +972-3-9065238

⁴Department of Physics, Macquarie University, Sydney, Australia 2109, Telephone: +61-2-9850 8935; Fax: +61-2-9850 8115