We propose a two-step quantum key distribution protocol using frequency and polarization hyperentangled photons. In this protocol, key information is encoded by unitary operations on the hyperentangled photons, and the hyperentangled photons are sent in two steps. We also designed a state measurement device and analyzed the security of the protocol.
© 2009 Optical Society of America
Original Manuscript: January 23, 2009
Revised Manuscript: August 1, 2009
Manuscript Accepted: September 15, 2009
Published: October 16, 2009
Chuan Wang, Li Xiao, Wan-ying Wang, Guang-yu Zhang, and Gui Lu Long, "Quantum key distribution using polarization and frequency hyperentangled photons," J. Opt. Soc. Am. B 26, 2072-2076 (2009)