Unlimited DoS attack protection method based on multipath switching

A multi-path, unlimited technology, applied in electrical components, transmission systems, etc., to solve detection problems and avoid continuous packet loss problems

Active Publication Date: 2021-03-12
ZHEJIANG UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

[0004] In order to overcome the problem of continuous packet loss caused by unrestricted DoS attacks, the present invention proposes a protection strategy based on multi-path switching, which combines the difference between random packet loss and packet loss caused by attacks to obtain the attack evaluation criteria, thereby switching paths, in a certain To a certain extent, it solves the problem of continuous packet loss caused by unlimited DoS attacks

Method used

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  • Unlimited DoS attack protection method based on multipath switching
  • Unlimited DoS attack protection method based on multipath switching
  • Unlimited DoS attack protection method based on multipath switching

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Embodiment

[0058] An unlimited DoS attack protection method based on multipath switching, comprising the following steps:

[0059] (1) System initialization and determination of path switching conditions: the sensing data from the sensor to the controller and the control data from the controller to the actuator are transmitted through the data communication network, there are unlimited DoS attacks in the network, and the known closed-loop packet loss rate of the network is p =0.3, and the system model is as follows:

[0060] x(k+1)=Ax(k)+Bu(k)+ω(k) (1-1)

[0061] Among them, the parameters are defined as follows:

[0062]

[0063] ω(k): Gaussian white noise with a variance of 0.01;

[0064] The initial state of the system is x(0)=[1 1 1] T

[0065] To calculate path switching conditions, the steps are as follows:

[0066] Step 11 Determine the maximum number of packet loss that the system can tolerate: According to the system stability conditions, the maximum number of continuous p...

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Abstract

The invention discloses an unlimited DoS attack protection method based on multipath switching, and the method comprises the steps: determining the tolerable maximum packet loss number of a system according to the network packet loss rate condition and a system model, designing a DoS attack detection module, and obtaining a multi-switching path condition; enabling the actuator end to record the current continuous packet loss number from the sensor to the controller and send the current continuous packet loss number to the sensor, if the current continuous packet loss number meets the path switching condition, enabling the sensor and the controller to switch the path to transmit data, and if the current continuous packet loss number does not meet the path switching condition, continuing thedetection. According to the multi-path switching protection method, the continuous packet loss phenomenon caused by unlimited DoS attacks can be solved by continuously detecting and switching paths,so that the system is always kept stable.

Description

technical field [0001] The invention relates to the fields of networked control systems and network security, in particular to a protection method for multi-path switching of the networked control system under unlimited DoS attacks. Background technique [0002] The data transmission channel of the networked control system (NCS) is closed by the data communication network such as the Internet, and has been widely used in various fields in recent years. However, the introduction of data communication network provides a convenient way for attackers to attack the control system. Among these network attacks, Denial of Service (DoS) attack is the most common, which can seriously affect NCS. A DoS attack uses up all network resources by flooding the target machine with requests, making them unavailable to legitimate users. Since the result of the DoS attack is that the controllers (actuators) in the NCS will not be able to receive data from the sensors (controllers), the conside...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L29/08
CPCH04L63/1416H04L63/1466H04L67/12
Inventor 赵云波朱巧慧
Owner ZHEJIANG UNIV OF TECH
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