title: Characterization of collective Gaussian attacks and security of coherent-state quantum cryptography.
abstract: We provide a simple description of the most general collective Gaussian attack in continuous-variable quantum cryptography. In the scenario of such general attacks, we analyze the asymptotic secret-key rates which are achievable with coherent states, joint measurements of the quadratures and one-way classical communication.
authors.affiliation: Research Laboratory of Electronics, MIT, Cambridge, Massachusetts 02139, USA.
authors.forename: Stefano
authors.initials: S
authors.lastname: Pirandola
authors.forename: Samuel L
authors.initials: SL
authors.lastname: Braunstein
authors.forename: Seth
authors.initials: S
authors.lastname: Lloyd