11 January 2005 Free-space quantum key distribution system with synchronously delayed classical signals
Author Affiliations +
Abstract
Two essential features of free-space quantum key distribution system are its timing pulses and frequency tracking devices. We make use of these two features to design a new type of quantum key distribution system with synchronously delayed classical signals. This scheme is much more secure since its synchronously randomizing of frequency and arriving time of quantum signals makes Eves have almost no opportunity to catch the quantum signals in time. Besides, this scheme can improve the intrinsic photon utilization efficient from 50% to 100%. Because the scheme breaks the symmetry between Bob and Eve before open discussion, it extends the concept of quantum key distribution and increases our choice of protocol bases.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Li Yang, Songhao Liu, Ge Du, "Free-space quantum key distribution system with synchronously delayed classical signals", Proc. SPIE 5631, Quantum Optics and Applications in Computing and Communications II, (11 January 2005); doi: 10.1117/12.576854; https://doi.org/10.1117/12.576854
PROCEEDINGS
3 PAGES


SHARE
RELATED CONTENT

Quantum unicity distance
Proceedings of SPIE (May 04 2012)
Quantum entanglement assisted key distribution
Proceedings of SPIE (April 25 2007)
Fiber optic quantum cryptography
Proceedings of SPIE (May 06 1996)

Back to Top