Phys. Rev. A 65, 012312 (2001) [12 pages]Conditional beam-splitting attack on quantum key distributionReceived 30 July 2001; published 12 December 2001 We present a different attack on quantum key distribution based on the idea of adaptive absorption [J. Calsamiglia et al., Phys. Rev. A (64, 043814 (2001)]. The conditional beam-splitting attack is shown to be much more efficient than the conventional beam splitting attack, achieving a performance similar to the, powerful but currently unfeasible, photon number splitting attack. The implementation of the conditional beam-splitting attack, based solely on linear optical elements, is well within the reach of current technology. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.65.012312
DOI:
10.1103/PhysRevA.65.012312
PACS:
03.67.Dd, 42.50.-p, 42.79.Sz
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