Confidential direct communications: a quantum approach using continuous variables

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 [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.

Invited paper. Extension of results presented in arXiv:0802.0656 (REVTeX, 11 pages, 11 figures)

References in corpus (7)

• Quantum information with continuous variables
• Continuous Variable Quantum Cryptography using Two-Way Quantum Communication
• Direct and Reverse Secret-Key Capacities of a Quantum Channel
• No-Switching Quantum Key Distribution using Broadband Modulated Coherent Light
• Characterization of Collective Gaussian Attacks and Security of Coherent-State Quantum Cryptography
• Quantum Teleportation with Continuous Variables: a survey
• Quantum Direct Communication with Continuous Variables

Cited by in corpus (8)

• Advances in Quantum Cryptography
• The Evolution of Quantum Secure Direct Communication: On the Road to the Qinternet
• Experimental free-space quantum secure direct communication and its security analysis
• Eavesdropping of two-way coherent-state quantum cryptography via Gaussian quantum cloning machines
• Complementary Relationships between Entanglement and Measurement
• Generic Security Analysis Framework for Quantum Secure Direct Communication
• Quantum secure data transfer with pulse shape encoded optical qubits
• Confidential Continuous Variable Direct Communication Protocol by Using Fock-Coherent Entangled States