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Quantum Communication Networks Quantum Cryptography Security

A Quantum-Memory-Free Quantum Secure Direct Communication Protocol Based on Privacy Amplification of Coded Sequences

arXiv
Authors: Shang-Jen Su, Shi-Yuan Wang, Matthieu R. Bloch

Year

2026

Paper ID

3157

Status

Preprint

Abstract Read

~2 min

Abstract Words

77

Citations

N/A

Abstract

We develop an information-theoretic analysis of Quantum-Memory-Free (QMF) Quantum Secure Direct Communication (QSDC) under collective attacks as an alternative to the conventional Quantum Key Distribution (QKD) protocol with one-time pads. Our main contributions are: 1) a QMF-QSDC protocol that only relies on universal hashing of coded sequences without wiretap coding; 2) a set of privacy amplification theorems for extracting secrecy from coded classical sequences against quantum side-information. These tools open the way to the design of robust QMF-QSDC protocols.

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  • This paper contributes to the Quantum Communication & Networks research area in the Quantum Articles archive.
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  • We develop an information-theoretic analysis of Quantum-Memory-Free (QMF) Quantum Secure Direct Communication (QSDC) under collective attacks as an alternative to the...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2601.21265 [2] arXiv https://arxiv.org/abs/2601.21265 [3] Publisher https://arxiv.org/abs/2601.21265

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