Privacy amplification for quantum key distribution
Privacy amplification for quantum key distribution
复制标题
DOI：
10.1088/1751-8113/40/3/f03
复制
发表时间：
2007-01
期刊：
影响因子：
--
通讯作者：
Yodai Watanabe
中科院分区：
文献类型：
--
作者：
Yodai Watanabe
本文研究了经典的隐私放大使用一个通用的家庭的哈希函数。在量子密钥分配中，对手的测量可以等到散列函数的选择被宣布，因此对手的信息可能取决于选择。因此，现有的经典隐私放大的结果，它假设的选择独立于其他随机变量，是不适用于这种情况。本文提供了一个隐私放大的安全性证明，即使对手的信息可能取决于哈希函数的选择是有效的。所提出的隐私放大的压缩率可以被认为是与现有的一个相同的指数小的最终密钥的秘密损失。
This paper examines classical privacy amplification using a universal family of hash functions. In quantum key distribution, the adversary's measurement can wait until the choice of hash functions is announced, and so the adversary's information may depend on the choice. Therefore the existing result on classical privacy amplification, which assumes the independence of the choice from the other random variables, is not applicable to this case. This paper provides a security proof of privacy amplification which is valid even when the adversary's information may depend on the choice of hash functions. The compression rate of the proposed privacy amplification can be taken to be the same as that of the existing one with an exponentially small loss in secrecy of a final key.