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arXiv 2405.02585cs.ITmath.IT
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最大猜测功泄漏

Maximal Guesswork Leakage

Gowtham R. Kurri, Malhar Managoli, Vinod M. Prabhakaran

AI总结:

本文提出最大猜测功泄漏和逐点泄漏等度量,研究观测Y后随机化函数猜测功的乘性下降,并在无记忆猜测下给出多数闭式表达式,揭示其与差分隐私及最大α-泄漏的联系。

摘要:

我们引入对通过“猜测功”(guesswork)造成的信息泄漏的研究,猜测功是指猜中一个随机变量所需的最小期望猜测次数。特别地,我们将“最大猜测功泄漏”定义为:在观测到Y之后,X的某个随机化函数的猜测功所发生的乘性下降,并在所有此类随机化函数上取最大值。我们还研究了一种逐点形式的泄漏,该泄漏刻画了由于Y的单个实现被释放而产生的泄漏。我们还研究了在遗忘(或无记忆)猜测下的这两种泄漏概念。除一种情况外,我们为所有这些泄漏度量都得到了闭式表达式。具体而言,我们仅能为二进制擦除源得到最大猜测功泄漏的闭式表达式;为任意源推导表达式似乎具有挑战性。我们结果的一些推论包括:猜测功与差分隐私之间的联系,以及最大α-泄漏在猜测功意义上的一个新的操作化解释。

英文摘要:

We introduce the study of information leakage through \emph{guesswork}, the minimum expected number of guesses required to guess a random variable. In particular, we define \emph{maximal guesswork leakage} as the multiplicative decrease, upon observing $Y$, of the guesswork of a randomized function of $X$, maximized over all such randomized functions. We also study a pointwise form of the leakage which captures the leakage due to the release of a single realization of $Y$. We also study these two notions of leakage with oblivious (or memoryless) guessing. We obtain closed-form expressions for all these leakage measures, with the exception of one. Specifically, we are able to obtain closed-form expression for maximal guesswork leakage for the binary erasure source only; deriving expressions for arbitrary sources appears challenging. Some of the consequences of our results are -- a connection between guesswork and differential privacy and a new operational interpretation to maximal $α$-leakage in terms of guesswork.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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