Gaussian one-way thermal quantum cryptography with finite-size effects

Abstract

We study the impact of finite-size effects on the security of thermal one-way quantum cryptography. Our approach considers coherent/squeezed states at the preparation stage, on the top of which the sender adds trusted thermal noise. We compute the key rate incorporating finite-size effects, and we obtain the security threshold at different frequencies. As expected finite-size effects deteriorate the performance of thermal quantum cryptography. Our analysis is useful to quantify the impact of this degradation on relevant parameters like tolerable attenuation, transmission frequencies at which one can achieve security.

REVTeX. 9 pages, 4 figures. Close to the published version

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Cited by in corpus (8)

• Advances in Quantum Cryptography
• Continuous-variable quantum key distribution system: past, present, and future
• Terahertz Quantum Cryptography
• Continuous-variable quantum cryptography with discrete alphabets: Composable security under collective Gaussian attacks
• Continuous-variable quantum communication
• Unidimensional continuous-variable measurement-device-independent quantum key distribution
• Security of continuous-variable quantum key distribution against canonical attacks
• Continuous-Variable Quantum Key Distribution with Composable Security and Tight Error Correction Bound towards Constrained-Device Implementations