Cryptography – Communication system using cryptography – Symmetric key cryptography
Reexamination Certificate
2011-02-01
2011-02-01
Moorthy, Aravind K (Department: 2431)
Cryptography
Communication system using cryptography
Symmetric key cryptography
C380S277000, C380S044000, C380S028000, C713S150000, C713S153000, C713S168000, C713S171000, C713S189000
Reexamination Certificate
active
07881473
ABSTRACT:
Method and system for transmitting optical clock signals and quantum key signals on a single optical channel. A multi-photon optical clock signal is received at an electro-optic switch at a first clock rate. The electro-optic switch may be configured for an interval defined by a second clock rate for generating a single photon quantum key signal. The multi-photon optical clock signal and the single photon quantum key signal are combined such that the single optical channel transmits the single photon quantum key signal at a first interval and the multi-photon optical clock signal at a second interval. The quantum key signal is transmitted from a transmitter at a first timing, and detected by a detector at a receiver. An output signal of the detector is sampled at a second timing that is delayed relative to the first timing for reducing quantum bit error rate.
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Hunt Jeffrey H.
Wang Shuoqin
Zehnder Daniel M.
Moorthy Aravind K
Quan Baldwin D.
The Boeing Company
Yee & Associates P.C.
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