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A method for unrestricted dos attack protection based on multi-path switching

A multi-path, unlimited technology, applied in digital transmission systems, secure communication devices, electrical components, etc., to solve the problem of attack detection and avoid continuous packet loss

Active Publication Date: 2022-05-24
ZHEJIANG UNIV OF TECH
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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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  • A method for unrestricted dos attack protection based on multi-path switching
  • A method for unrestricted dos attack protection based on multi-path switching
  • A method for unrestricted dos attack protection based on multi-path switching

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Embodiment

[0058] An unrestricted DoS attack protection method based on multi-path switching, including the following steps:

[0059] (1) System initialization and determination of path switching conditions: The sensor 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 network closed-loop packet loss rate p is known. = 0.3, and the system model is as follows:

[0060] x(k+1)=Ax(k)+Bu(k)+ω(k) (1-1)

[0061] Among them, each parameter is defined as follows:

[0062]

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

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

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

[0066] Step 11: Determine the maximum number of packet losses that the system can tolerate: obtain the maximum number of consecutive packet losses that the system can maintain...

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Abstract

Unlimited DoS attack protection method based on multi-path switching. First, determine the maximum number of packet loss that the system can tolerate according to the network packet loss rate and the system model, and design a DoS attack detection module to obtain the multi-switching path condition; The current number of continuous packet loss from the sensor to the controller is sent to the sensor. If the current continuous packet loss meets the path switching condition, the sensor and the controller switch paths to transmit data. If the current continuous packet loss does not meet the path switching condition, continue detection. The multi-path switching protection method can solve the continuous packet loss phenomenon caused by unlimited DoS attacks through continuous detection and switching paths, so that the system remains stable.

Description

technical field [0001] The invention relates to the field of networked control systems and network security, in particular to a protection method for performing multi-path switching on a networked control system under unrestricted DoS attacks. Background technique [0002] The data transmission channel of a networked control system (NCS) is closed by a data communication network such as the Internet, and has been widely used in various fields in recent years. However, the introduction of data communication networks provides a convenient way for attackers to attack control systems. Among these cyber-attacks, Denial of Service (DoS) attacks are the most common, which can severely impact NCS. DoS attacks exhaust all network resources by sending a large number of requests to the target machine, making it unavailable to legitimate users. As the result of the DoS attack is that the controller (actuator) in the NCS will not be able to receive data from the sensor (controller), th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/40H04L67/12
CPCH04L63/1416H04L63/1466H04L67/12
Inventor 赵云波朱巧慧
Owner ZHEJIANG UNIV OF TECH
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