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首页> 外文期刊>IEEE signal processing letters >Information-Theoretic Privacy in Smart Metering Systems Using Cascaded Rechargeable Batteries
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Information-Theoretic Privacy in Smart Metering Systems Using Cascaded Rechargeable Batteries

机译：级联可充电电池的智能计量系统中的信息理论隐私

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摘要

A rechargeable battery may alleviate the issue of privacy loss in a smart metering system by distorting a household's load profile. However, existing studies involve a single rechargeable battery, whereas in a network scenario, there could be multiple batteries connected together. In this letter, we study the extension where a user's electricity load is input into a network of two rechargeable batteries, connected in series, and operating individually. This battery network attempts to mask the user load from the utility provider. We focus on the case of independent identically distributed load profile and a system of ideal batteries with no conversion loss, and use normalized mutual information (leakage rate) as the privacy metric. We derive upper and lower bounds on the leakage rate in terms of (single-letter) mutual information expressions. On the achievability side, our information-theoretic upper bound captures the novel tension between minimizing the leakage across each individual battery and the effect of their joint interaction. For the lower bound, we show that a system with a single battery, whose storage capacity is the sum of the two individual batteries, can achieve a leakage rate at least as small as our proposed setup. Furthermore, we use simulations to compare achievable leakage of our proposed scheme with several baseline schemes. The achievable leakage rates obtained in this study could help us to elucidate the privacy performance of a network of batteries.
机译：可充电电池可以通过扭曲家庭的负载曲线来减轻智能计量系统中隐私丢失的问题。但是，现有研究仅涉及一个可充电电池，而在网络环境中，可能会有多个电池连接在一起。在这封信中，我们研究了扩展，其中用户的电力负载输入到两个可充电电池的网络中，该电池串联连接并分别运行。该电池网络试图掩盖公用事业提供商的用户负担。我们将重点放在独立的，均匀分布的负载曲线和没有转换损耗的理想电池系统的情况下，并将归一化的互信息（泄漏率）用作隐私度量。我们根据（单字母）互信息表达式得出泄漏率的上限和下限。在可实现性方面，我们的信息理论上限捕获了在使每个单独电池之间的泄漏最小化及其联合相互作用的影响之间的新颖张力。对于下限，我们表明具有单个电池的系统（其存储容量为两个单独电池的总和）可以实现至少与我们建议的设置一样小的泄漏率。此外，我们使用模拟将我们提出的方案与几个基线方案的可实现泄漏进行比较。在这项研究中获得的可达到的泄漏率可以帮助我们阐明电池网络的隐私性能。

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