Zero-dynamics attackThis paper considers the security of non-minimum phase systems, a typical kind of cyber-physical systems. Non-minimum phase systems are characterized by unstable zeros in their transfer functions, making them particularly susceptible to disturbances and attacks. The non-minimum ...
Extended Data Fig. 2 Estimated Rtdaily incidence and cumulative infection attack rate in Beijing when the ascertainment probability after 1 November was estimated in the inference. a, EstimatedRtbetween 1 November and 22 December. Lines indicate themaximum a posteriori probability (MAP)estimates and s...
This opens a serious attack vector: by sending data to a suspected port knocking service port, an attacker can force the server to perform computations, potentially blocking out valid client knocks. As per [49], “processing required to verify the [knock] should be minimal and not introduce ...
zero-dynamics attacksThis paper studies the periodic zero-dynamics attacks (ZDAs) in multi-agent systems without velocity measurements under directed graph. Specifically, two types of attack modes are addressed, i.e., infinite number and finite number of zero-dynamics attacks. For the former case,...
Zero dynamics attacks can be lethal to cyber鈥損hysical systems because they can be harmful to physical plants and impossible to detect. Fortunately, if the given continuous-time physical system is minimum phase, the attack is not so effective even if it cannot be detected. However, the ...
When the attack signals must be quantized, some error will be necessarily introduced, potentially increasing the chance of detection through the output of the system. In this article, we show, however, that the attacker may reduce such errors by avoiding to directly quantize the attack signal. ...
We first interpret the (non-robust) conventional zero-dynamics attack based on Byrnes-Isidori normal form, and then present a new robust zero-dynamics attack for uncertain plants. Different from the conventional strategy, our key idea is to isolate the real zero-dynamics from the plant's input...
Zero dynamics attacks can be lethal to cyber-physical systems because they can be harmful to physical plants and impossible to detect. Fortunately, if the given continuous-time physical system is minimum phase, the attack is not so effective even if it cannot be detected. However, the situation...
The zero-dynamics attack is well-known for its lethality and stealthiness. This infamous attack has usually been studied as a type of actuator attack. In this paper, however, we focus on the zero-dynamics attack having a form of a sensor attack. In particular, when the system monitors ...
As for the scenario of finite number of periodic ZDAs, the consensus value, specified by the weight of the initial conditions, can only be destroyed whenever the rooted agents are attacked, apart from the attack signal satisfying certain constraints. Based on this observation, we further give ...