Sequential attacks against differential-phase-shift quantum key distribution with weak coherent states

Marcos Curty, Lucy-Liuxuan Zhang, Hoi-Kwong Lo, and Norbert Lütkenhaus 1 Center for Quantum Information and Quantum Control, Department of Physics and Department of Electrical & Computer Engineering, University of Toronto, Toronto, Ontario, M5S 3G4, Canada 2 Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario, N2L 3G1, Canada 3 Quantum Information Theory Group, Institut für Theoretische Physik I, and Max-Planck Research Group, Institute of Optics, Information and Photonics, Universität Erlangen-Nürnberg, 91058 Erlangen, Germany (Dated: February 1, 2008)