Differential-phase-shift quantum key distribution (DPS-QKD) with an extended degree of freedom of measurement is proposed. Extending the degree of freedom makes it possible to strengthen the DPS-QKD scheme against intercept-and-resend attacks. The feasibility of this idea is experimentally demonstrated.
© 2006 Optical Society of America
Original Manuscript: October 3, 2005
Manuscript Accepted: October 30, 2005
Toshimori Honjo and Kyo Inoue, "Differential-phase-shift quantum key distribution with an extended degree of freedom," Opt. Lett. 31, 522-524 (2006)