Method of defense against DDoS attacks in P2P stream media system

Abstract

The invention aims at providing a method for defending a DDoS aggression in a P2P media stream system, which includes the following steps: the step that the node sends a joining requirement information to the media stream server is included and in the step, after receiving the joining requirement information, the server informs the joining requirement information of the node to the reputation node and the controlling node and return the partial nodes and a initial reputation value; a step that the reputation nodes calculate the node reputation value is included and in the step, after receiving the notices, the reputation node and the controlling node store the information of the node into own node list in order to evaluate and control the action of the node; the step that the node requires a data from the media server or local network is included, which is used for requesting the needed media data by the node; a step that the controlling node judges the node requirement rate is included, which is used for calculating the node requirement rate; a step that whether the requirement rate exceeds the limiting value is judged is also included, which is used for judging whether the requirement rate of the requirement node exceeds the limiting value or not; if the rate exceeds the limiting value, the requirement is stopped, otherwise, the request of the node is permitted.

Description

technical field [0001] The invention relates to the fields of computer network, communication and information security, in particular to a method for defending against DDoS attacks in a P2P streaming media system. Background technique [0002] Distributed Denial of Service (DDoS: Distributed Denial of Service) attack is a new denial of service (DoS: Denial of Service) attack that has emerged in recent years. A single DoS attack generally adopts a one-to-one method, and its effect is obvious when the performance indicators of the attack target such as low CPU speed, small memory or small network bandwidth are not high. With the development of computer and network technology, the processing power of the computer has increased rapidly, the memory has increased greatly, and there has also been a gigabit network, which makes DoS attacks more difficult. At this time, distributed denial-of-service attacks came into being. Due to its distributed nature, DDoS attacks have more atta...

AI Technical Summary

Problems solved by technology

[0005] Existing solutions are only to study the traditional DoS attacks in the P2P streaming media system, without considering the distribution of the P2P system and DDoS attacks are more likely to occur, and all of them are single for one of the DoS attacks, cannot Simultaneously prevent DDoS attacks on servers and local systems

At the same time, it fails to comprehensively consider the different performances of nodes in the P2P streaming media system, which limits the behavior of malicious nodes and also affects the services of benign nodes.

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