Unconditional security proof of a deterministic quantum key distribution with a two-way quantum channel
Quantum Physics
2011-11-02 v1
Abstract
In a deterministic quantum key distribution (DQKD) protocol with a two-way quantum channel, Bob sends a qubit to Alice who then encodes a key bit onto the qubit and sends it back to Bob. After measuring the returned qubit, Bob can obtain Alice's key bit immediately, without basis reconciliation. Since an eavesdropper may attack the qubits traveling on either the Bob-Alice channel or the Alice-Bob channel, the security analysis of DQKD with a two-way quantum channel is complicated and its unconditional security has been controversial. This paper presents a security proof of a single-photon four-state DQKD against general attacks.
Cite
@article{arxiv.1111.0109,
title = {Unconditional security proof of a deterministic quantum key distribution with a two-way quantum channel},
author = {Hua Lu and Chi-Hang Fred Fung and Xiongfeng Ma and Qing-yu Cai},
journal= {arXiv preprint arXiv:1111.0109},
year = {2011}
}
Comments
Publication version