Title :
Confidential Direct Communications: A Quantum Approach Using Continuous Variables
Author :
Pirandola, Stefano ; Braunstein, Samuel L. ; Lloyd, Seth ; Mancini, Stefano
Author_Institution :
Center for Extreme Quantum Inf. Theor. (xQIT), Massachusetts Inst. of Technol., Cambridge, MA, USA
Abstract :
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 [Pirandola et al., Europhys. Lett., vol. 84, pp. 20013-1-20013-6, 2008]. Here, we analyze the degree of privacy of this technique against a broader class of attacks, which includes non-Gaussian eavesdropping.
Keywords :
data privacy; quantum communication; quantum theory; confidential direct communications; continuous variables; nonGaussian eavesdropping; privacy degree; quantum approach; quantum mechanics; Cloning; Gaussian states; continuous variables; error correction; non-Gaussian attacks; quantum communication; security;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2009.2021147
