We consider the problem of privacy in direct communications, showing how quantum mechanics can be useful to guarantee a certain level of confidentiality. In particular, we review a continuous variable approach recently proposed by us [S. Pirandola et al., Europhys. Lett. 84, 20013 (2008)]. Here, we analyze the degree of privacy of this technique against a broader class of attacks, which includes non-Gaussian eavesdropping.
@article{arxiv.0903.0750,
title = {Confidential direct communications: a quantum approach using continuous variables},
author = {Stefano Pirandola and Samuel L. Braunstein and Seth Lloyd and Stefano Mancini},
journal= {arXiv preprint arXiv:0903.0750},
year = {2010}
}
Comments
Invited paper. Extension of results presented in arXiv:0802.0656 (REVTeX, 11 pages, 11 figures)