Cryptography – Communication system using cryptography – Fiber optic network
Reexamination Certificate
2005-03-08
2008-10-14
Revak, Christopher A (Department: 2131)
Cryptography
Communication system using cryptography
Fiber optic network
C380S278000
Reexamination Certificate
active
07436961
ABSTRACT:
A method of improving the security of a QKD system is disclosed. The method includes sending synchronization (“sync”) signals from a first QKD station to the second QKD station over a sync signal channel and recording data relating to the arrival times of the sync signals at the second QKD station. The method also includes processing the arrival time data to discern between extra signals in the sync signal channel that were not sent by the first QKD station over the sync channel, and sync signals that were sent by the first QKD station over the sync channel. The method also includes sending an alarm signal when it is determined that extra signals in the sync channel could be due to an attack on the QKD system.
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Mitchell Howell
Vig Harry
MagiQ Technologies, Inc.
Opticus IP Law PLLC
Revak Christopher A
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