S. Pirandola et al 2008 EPL 84 20013 doi:10.1209/0295-5075/84/20013
S. Pirandola1, S. L. Braunstein2, S. Mancini3 and S. Lloyd1,4
Show affiliationsWe show how continuous-variable systems can allow the direct communication of messages with an acceptable degree of privacy. This is possible by combining a suitable phase-space encoding of the plain message with real-time checks of the quantum communication channel. The resulting protocol works properly when a small amount of noise affects the quantum channel. If this noise is non-tolerable, the protocol stops leaving a limited amount of information to a potential eavesdropper.
03.67.Dd Quantum cryptography and communication security
Issue 2 (October 2008)
Received 5 February 2008, accepted for publication 12 September 2008
Published 14 October 2008
S. Pirandola et al 2008 EPL 84 20013
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