Eavesdropping of Two-Way Coherent-State Quantum Cryptography via Gaussian Quantum Cloning Machines

Author

Pirandola, Stefano ; Mancini, Stefano ; Lloyd, Seth ; Braunstein, Samuel L.

Author_Institution

Res. Lab. of Electron., Massachusetts Inst. of Technol., Cambridge, MA

fYear

2009

fDate

1-7 Feb. 2009

Firstpage

38

Lastpage

41

Abstract

We consider one of the quantum key distribution protocols recently introduced in Ref. [Pirandola et al., Nature Phys. 4, 726 (2008)]. This protocol consists of a two-way quantum communication between Alice and Bob, where Alice encodes secret information via a random phase-space displacement of a coherent state. In particular, we study its security against a specific class of individual attacks which are based on combinations of Gaussian quantum cloning machines.

Keywords

Gaussian processes; cryptographic protocols; quantum cryptography; Gaussian quantum cloning machines; coherent state; quantum key distribution protocols; random phase-space displacement; secret information; two-way coherent-state quantum cryptography; Cloning; Cryptography; Gaussian channels; Laboratories; Protocols; Quantum computing; Quantum mechanics; Security; Signal to noise ratio; Stochastic processes; Quantum Cloning; Quantum Cryptography;

fLanguage

English

Publisher

ieee

Conference_Titel

Quantum, Nano and Micro Technologies, 2009. ICQNM '09. Third International Conference on

Conference_Location

Cancun

Print_ISBN

978-1-4244-3349-0

Electronic_ISBN

978-0-7695-3524-1

Type

conf

DOI

10.1109/ICQNM.2009.8

Filename

4782919