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Efficient similar subscription merging method for rejecting service attack

A denial of service attack and efficient technology, applied in electrical components, transmission systems, etc., can solve the problems of high subscription merge time complexity, large node subscription storage, etc., to reduce node subscription storage, solve denial of service attacks, time low-complexity effects

Inactive Publication Date: 2015-01-14
CHANGSHU RES INSTITUE OF NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose an efficient method for merging similar subscriptions in a publish-subscribe system in view of the problems of high subscription merging time complexity and large node subscription storage capacity in the current publish-subscribe system

Method used

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Embodiment

[0020] The present invention relates to an efficient similar subscription merging method for denial of service attacks, the steps are as follows:

[0021] The first step is to judge the event attribute type in the publish-subscribe system and standardize it

[0022] For the attribute of numerical type, its value range is standardized to [0,1]. If the value range of attribute A is [Amin,Amax], then a certain value x of this attribute is normalized to (x-Amin)(Amax -Amin). For other data types, it is first converted to a numerical type according to the dictionary order, and then standardized;

[0023] The second step is to similarly group event subscriptions according to the scope of attribute constraints

[0024] For each attribute A, first merge all subscriptions in the object collection into t groups according to the size of the constraint range on attribute A: G1, G2, ..., Gt, where t is a parameter controlling the size of the merged granularity. in group The bound rang...

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PUM

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Abstract

The invention relates to the field of service attack rejection of subscription issuing systems, in particular to an efficient similar subscription merging method for rejecting a service attack. The method includes the steps of firstly, judging the event attribute type in a subscription issuing system and conducting standardized processing; secondly, conducting similarity grouping on event subscriptions according to the attribute constraint range [Amin, Amax]; thirdly, dividing the subscriptions in each group into a plurality of sub-groups according to positions within the constraint range; fourthly, merging all the subscriptions with attributes in the same sub-group into a new subscription. The method is low in time complexity, the merging granularity can be dynamically controlled according to the node load conditions, the node subscription storage amount can be greatly decreased, and then the purpose of rejecting the service attack can be effectively achieved.

Description

technical field [0001] The invention relates to the field of denial-of-service attacks of publish-subscribe systems, and more specifically relates to an efficient method for merging similar subscriptions for denial-of-service attacks. Background technique [0002] The publish-subscribe system is an effective method for discovering resources in a distributed system. Compared with the traditional RPC-based information exchange mode, the publish-subscribe system has the following outstanding advantages: distributed components communicate indirectly through the notification environment without implementing other Binding; the participants in the interactive activity are independent of each other and do not need to know the existence of the other party; the two parties in the communication do not need to be in the running state at the same time. Therefore, the publish-subscribe system is especially suitable for information sharing of dynamically changing large-scale distributed ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06
CPCH04L63/1458
Inventor 李千目路国翠侯君戚湧
Owner CHANGSHU RES INSTITUE OF NANJING UNIV OF SCI & TECH
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