Secret Key Agreement by Soft-Decision of Signals in Gaussian Maurer's Model
Secret Key Agreement by Soft-Decision of Signals in Gaussian Maurer's Model
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DOI：
10.1587/transfun.e92.a.525
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发表时间：
2009-02-01
影响因子：
0.5
通讯作者：
Uyematsu, Tomohiko
中科院分区：
文献类型：
--
作者：
Naito, Masashi;Watanabe, Shun;Uyematsu, Tomohiko
本文研究了Gaussian Maurer模型下的密钥协商问题。在Gaussian Maurer的模型中，合法接收者Alice和Bob以及窃听者Eve分别通过三个独立的无记忆高斯信道接收卫星随机产生的信号。然后，Alice和Bob从他们接收到的信号中生成一个公共密钥。在这个模型中，我们提出了一个协议，用于产生一个共同的秘密密钥，通过使用的结果，软判决的爱丽丝和鲍勃的接收信号。然后，我们计算了我们提出的协议中的秘密密钥速率的下限。与只使用硬判决的协议相比，我们发现使用我们的协议可以获得更高的速率。
We consider the problem of secret key agreement in Gaussian Maurer's Model. In Gaussian Maurer's model, legitimate receivers, Alice and Bob, and a wire-tapper, Eve, receive signals randomly generated by a satellite through three independent memoryless Gaussian channels respectively. Then Alice and Bob generate a common secret key from their received signals. In this model, we propose a protocol for generating a common secret key by using the result of soft-decision of Alice and Bob's received signals. Then, we calculate a lower bound on the secret key rate in our proposed protocol. As a result of comparison with the protocol that only uses hard-decision, we found that the higher rate is obtained by using our protocol.