Entangling probes of QKD

Howard E. Brandt

doi:10.1117/12.661536

12 May 2006 Entangling probes of QKD

Howard E. Brandt

Proceedings Volume 6244, Quantum Information and Computation IV; 62440G (2006) https://doi.org/10.1117/12.661536
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

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.

Citation Download Citation

Howard E. Brandt "Entangling probes of QKD", Proc. SPIE 6244, Quantum Information and Computation IV, 62440G (12 May 2006); https://doi.org/10.1117/12.661536

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