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Proceedings Paper

Entangling probes of QKD
Author(s): Howard E. Brandt
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Paper Abstract

Following a review of the measure of Renyi information gain and its optimization, the quantum circuits and designs are reviewed of optimized entangling probes for attacking the BB84 protocol of quantum key distribution (QKD), extracting maximum Renyi information on the pre-privacy amplified key. Probe photon polarization states become optimally entangled with the signal states on their way between the legitimate transmitter and receiver. Standard symmetric von Neumann projective measurements of the probe yield maximum information on the pre-privacy amplified key.

Paper Details

Date Published: 12 May 2006
PDF: 8 pages
Proc. SPIE 6244, Quantum Information and Computation IV, 62440G (12 May 2006); doi: 10.1117/12.661536
Show Author Affiliations
Howard E. Brandt, U. S. Army Research Lab. (United States)


Published in SPIE Proceedings Vol. 6244:
Quantum Information and Computation IV
Eric J. Donkor; Andrew R. Pirich; Howard E. Brandt, Editor(s)

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