高斯噪声存在下相干态量子密码学的安全性
量子物理
2007-12-12 v4
摘要
我们研究了在渐近密钥极限下，针对现实环境中连续变量量子密钥分发方案对集体攻击的安全性。连接两个诚实方的量子信道被假定是有损耗的，并对观测到的正交分布施加高斯噪声。给出了在集体攻击场景下，包括后选择在内的直接和反向协调方案的秘密密钥速率。还考虑了经典后处理步骤中非理想纠错和双向通信的影响。
引用
@article{arxiv.quant-ph/0608015,
title = {Security of coherent state quantum cryptography in the presence of Gaussian noise},
author = {Matthias Heid and Norbert Lütkenhaus},
journal= {arXiv preprint arXiv:quant-ph/0608015},
year = {2007}
}
备注
12 pages, 5 figures updated version including two-way communication; changed the definition of the excess noise to match the definition given earlier (Phys. Rev. Lett. 92, 117901); submitted to PRA; presented at the 8th International Conference on Quantum Communication, Measurement and Computing, Tsukuba