Dynamic window selection method based on game theory, and wireless network trust management system

Abstract

The invention belongs to the technical field of computer network safety, and discloses a dynamic window selection method based on the game theory, and a wireless network trust management system. The method comprises the steps: building a game model between a trust management system and an attacker; carrying out the systematic quantification of a strategy set of the attacker, and quantifying a strategy set according to the strategy set of the attacker; obtaining a payment matrix of the game theory through employing numerical simulation, and solving the game model through the maximum-minimum principle; and selecting the size of an optimal window according to a Nash equilibrium point. According to the invention, the method can achieve the dynamic selection of the size of the optimal window inthe trust calculation according to the behavior characteristics of the attacker and a network state, achieves the minimization of system loss, and achieves the detection of a malicious node with thedynamic behaviors.

Description

technical field [0001] The invention belongs to the technical field of computer network security, and in particular relates to a dynamic window selection method based on game theory and a wireless network trust management system. Background technique [0002] Trust management technology is an important means to ensure network security. By introducing a trust evaluation mechanism in the user authentication phase and access control phase, it can largely guarantee that users and applications are not malicious to resources, thereby protecting network resources from being damaged. Among them, trust, as a measure of the credibility of entity behavior in the network, has multiple functions: first, trust management can quantify the degree of trust based on historical experience data and node behavior information, and obtain the trust value of nodes , expresses the expectation of the behavior of a certain node; second, the trust value can express the credibility of a node's specific...

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Problems solved by technology

[0003] To sum up, the problems existing in the existing technology are: using a fixed-size window to calculate the trust value cannot adapt to the dynamically changing network environment; in addition, the size of the window in the existing window mechanism does not fully consider the strategic interaction between the attacking and defending parties, only considering The impact of the attacker's behavior on the system is not considered, and the impact of the system's behavior on the attacker's behavior is not considered. As a result, the trust management system cannot effectively detect the attacker who dynamically changes the attack strategy according to the system defense strategy.

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