arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1802.02850cs.GTcs.ITmath.IT
收藏

完全主动对手下的检测博弈

Detection Games Under Fully Active Adversaries

Benedetta Tondi, Neri Merhav, Mauro Barni

摘要:

我们研究了一个二元假设检验问题,在这个问题中,防御者必须决定测试序列是否是从给定的无记忆源$P_0$中提取的,而攻击者则努力阻止正确的检测。相对于以前的作品,本文中所讨论的对抗设置考虑了在两个假设下都活跃的攻击者,即完全活跃的攻击者,而不是仅在一个假设下活跃的部分活跃攻击者。在完全主动设置中,攻击者使从$P_0$和从替代无记忆源$P_1$两者提取的序列失真直到在两个假设下可能不同的特定失真水平,以便最大化区分两个源时的混淆,即,以在检测器(也称为防御器)处引起假阳性和假阴性错误。我们将防御者-攻击者的互动建模为一个博弈,并研究了这个博弈的两个版本,Neyman-Pearson博弈和贝叶斯博弈。我们的主要结果是在一个攻击策略的特征,这是渐近都占主导地位(即,无论防御者的策略是什么,都是最优的)和普遍的,即,独立于$P_0$和$P_1$。从分析的均衡回报,我们还得到了最好的可实现的性能的后卫,放松的要求的指数衰减率的假阳性错误概率的Neyman-Pearson设置和贝叶斯设置的错误指数之间的权衡。这种分析允许表征给定失真水平的两个源的可互换性的条件。

英文摘要:

We study a binary hypothesis testing problem in which a defender must decide whether or not a test sequence has been drawn from a given memoryless source $P_0$ whereas, an attacker strives to impede the correct detection. With respect to previous works, the adversarial setup addressed in this paper considers an attacker who is active under both hypotheses, namely, a fully active attacker, as opposed to a partially active attacker who is active under one hypothesis only. In the fully active setup, the attacker distorts sequences drawn both from $P_0$ and from an alternative memoryless source $P_1$, up to a certain distortion level, which is possibly different under the two hypotheses, in order to maximize the confusion in distinguishing between the two sources, i.e., to induce both false positive and false negative errors at the detector, also referred to as the defender. We model the defender-attacker interaction as a game and study two versions of this game, the Neyman-Pearson game and the Bayesian game. Our main result is in the characterization of an attack strategy that is asymptotically both dominant (i.e., optimal no matter what the defender's strategy is) and universal, i.e., independent of $P_0$ and $P_1$. From the analysis of the equilibrium payoff, we also derive the best achievable performance of the defender, by relaxing the requirement on the exponential decay rate of the false positive error probability in the Neyman--Pearson setup and the tradeoff between the error exponents in the Bayesian setup. Such analysis permits to characterize the conditions for the distinguishability of the two sources given the distortion levels.

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。

↑