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首页> 外文期刊>Information Forensics and Security, IEEE Transactions on >Resource Allocation for Secret Key Agreement Over Parallel Channels With Full and Partial Eavesdropper CSI
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Resource Allocation for Secret Key Agreement Over Parallel Channels With Full and Partial Eavesdropper CSI

机译：具有完整和部分窃听者CSI的并行通道上的秘密密钥协商的资源分配

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摘要

We consider the distillation phase of the secret key agreement (SKA) channel model for users connected through parallel additive white Gaussian noise fading channels. Alice sends binary phase shift keying modulated random bits to Bob who selects the subset of bits that have a log-likelihood ratio higher than a given threshold, i.e., they are sufficiently reliable. Alice has either full or partial channel state information (CSI) on her channel to the eavesdropper Eve. The main contributions of this paper are: 1) the derivation of the expression of outage probability when partial CSI is available; 2) the introduction of (outage) secret key throughput (SKT) as a metric in the full (partial) CSI scenario; 3) the derivation of SKT bounds; 4) the proposal of a new power allocation and threshold choice algorithm that maximizes the SKT under an outage probability constraint; and 5) the derivation of a suboptimal version of the allocation algorithm amenable for practical implementation obtained by approximating the objective functions with a closed-form expression. Moreover, we show that when power allocation and thresholds are optimized, per-channel and joint SKA are equivalent.
机译：对于通过并行加性高斯白噪声衰减通道连接的用户，我们考虑了密钥协商协议（SKA）通道模型的精炼阶段。爱丽丝将二进制相移键控调制后的随机比特发送给鲍勃，鲍勃选择对数似然比高于给定阈值的比特子集，即它们足够可靠。爱丽丝在通往窃听者夏娃的频道上具有全部或部分频道状态信息（CSI）。本文的主要贡献是：1）推导了部分CSI可用时的中断概率表达式； 2）在全部（部分）CSI方案中引入（中断）秘密密钥吞吐量（SKT）作为度量； 3）SKT边界的推导； 4）提出了一种新的功率分配和阈值选择算法的建议，该算法可在出现断电概率约束的情况下最大化SKT； 5）推导适用于实际实现的分配算法的次优版本，该最优算法是通过用封闭形式的表达式逼近目标函数而获得的。此外，我们表明，当优化功率分配和阈值时，每通道和联合SKA是等效的。

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