X - NASA Quantum Future Technologies Conference
X - NASA Quantum Future Technologies Conference
X - NASA Quantum Future Technologies Conference
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Key Milestones in CV-‐QKD<br />
§� (1999) Idea of encoding information onto non-‐commuting quadratures of<br />
coherent light [1]<br />
ú� Tim Ralph – now advisor to Quintessence Labs<br />
§� (2000) Extended CV-‐QKD to use squeezed states [2]<br />
§� (2000) Variant of squeezed state protocol that used binary modulated<br />
squeezed light [3]<br />
§� (2000) CV-‐QKD with continuous EPR correlations [4]<br />
§� (2001) Proof CV-‐QKD with squeezed states is unconditionally secure [5]<br />
§� (2001) Improved squeeze state protocol that relied on sending and<br />
detecting Gaussian information [6]<br />
§� (2002 ) New CV-‐QKD protocol based on coherent states [7]<br />
ú� This protocol suffers from the 3 dB loss limit, i.e., protocol becomes insecure for a<br />
transmission loss greater than 50%<br />
§� (2002) Post-‐selection introduced to overcome the 3 dB loss limit [8]<br />
ú� In post-‐selection, Alice and Bob only select data points where they have an information<br />
advantage over Eve
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