Asymptotic Analysis of Distributed Bayesian Detection with Byzantine Data
This addresses security vulnerabilities in distributed detection systems, particularly for applications like sensor networks, but is incremental as it builds on existing asymptotic analysis frameworks.
The paper tackles the problem of distributed Bayesian detection in networks with Byzantine data falsification, showing that above a certain fraction of Byzantine attackers, the detection scheme becomes completely incapable of utilizing sensor data, and provides closed-form expressions for optimal attacking strategies when the fraction is insufficient to blind the fusion center.
In this letter, we consider the problem of distributed Bayesian detection in the presence of data falsifying Byzantines in the network. The problem of distributed detection is formulated as a binary hypothesis test at the fusion center (FC) based on 1-bit data sent by the sensors. Adopting Chernoff information as our performance metric, we study the detection performance of the system under Byzantine attack in the asymptotic regime. The expression for minimum attacking power required by the Byzantines to blind the FC is obtained. More specifically, we show that above a certain fraction of Byzantine attackers in the network, the detection scheme becomes completely incapable of utilizing the sensor data for detection. When the fraction of Byzantines is not sufficient to blind the FC, we also provide closed form expressions for the optimal attacking strategies for the Byzantines that most degrade the detection performance.