dorsal/arxiv
View SchemaImproving the security of quantum direct communication with authentication
| Authors | Zhan-jun Zhang |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0604125 |
| URL | https://arxiv.org/abs/quant-ph/0604125 |
| DOI | 10.1103/PhysRevA.75.026301 |
Abstract
Two protocols of quantum direct communication with authentication [Phys. Rev. A {\bf 73}, 042305 (2006)] are recently proposed by Lee, Lim and Yang. In this paper we will show that in the two protocols the authenticator Trent should be prevented from knowing the secret message of communication. The first protocol can be eavesdropped by Trent using the the intercept-measure-resend attack, while the second protocol can be eavesdropped by Trent using single-qubit measurement. To fix these leaks, I revise the original versions of the protocols by using the Pauli-Z operation $\sigma_z$ instead of the original bit-flip operation $X$. As a consequence, the protocol securities are improved.
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"abstract": "Two protocols of quantum direct communication with authentication [Phys. Rev.\nA {\\bf 73}, 042305 (2006)] are recently proposed by Lee, Lim and Yang. In this\npaper we will show that in the two protocols the authenticator Trent should be\nprevented from knowing the secret message of communication. The first protocol\ncan be eavesdropped by Trent using the the intercept-measure-resend attack,\nwhile the second protocol can be eavesdropped by Trent using single-qubit\nmeasurement. To fix these leaks, I revise the original versions of the\nprotocols by using the Pauli-Z operation $\\sigma_z$ instead of the original\nbit-flip operation $X$. As a consequence, the protocol securities are improved.",
"arxiv_id": "quant-ph/0604125",
"authors": [
"Zhan-jun Zhang"
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"doi": "10.1103/PhysRevA.75.026301",
"title": "Improving the security of quantum direct communication with authentication",
"url": "https://arxiv.org/abs/quant-ph/0604125"
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