Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Collective attacks and unconditional security in continuous variable
  quantum key distribution   We present here an information theoretic study of Gaussian collective attacks
on the continuous variable key distribution protocols based on Gaussian
modulation of coherent states. These attacks, overlooked in previous security
studies, give a finite advantage to the eavesdropper in the experimentally
relevant lossy channel, but are not powerful enough to reduce the range of the
reverse reconciliation protocols. Secret key rates are given for the ideal case
where Bob performs optimal collective measurements, as well as for the
realistic cases where he performs homodyne or heterodyne measurements. We also
apply the generic security proof of Christiandl et. al. [quant-ph/0402131] to
obtain unconditionally secure rates for these protocols.

25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex