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Study of Trust Model Based on Sliding Window in Grid

Author: WangPei
Tutor: ZhangZhongPing
School: Yanshan University
Course: Computer Software and Theory
Keywords: Grid Trust model Sliding window Time correction function Trust assessment
CLC: TP393.08
Type: Master's thesis
Year: 2010
Downloads: 17
Quote: 0
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Abstract


Grid after the Internet and the rapid development of a new type of network computing platform , it can achieve full sharing of resources , to provide users with an integrated quality service . However , because of its large-scale , distributed , heterogeneous and dynamic characteristics of grid computing environment is very complex , which requires a higher and broader than the traditional network environment safety requirements . Security issues is the key issue of grid computing technology , the question of trust is addressing grid security must face the core issues . Therefore trust issues , it is necessary to propose an effective trust model . First, in the study of existing classic trust model based on an improved grid trust model based on sliding window SWTrust . The trust model based on different criteria , the entire grid system is divided into a number of different types of autonomous management step by step through two trust set domain and inter-domain agent nodes , in order to improve the autonomy of the domain ; trust relationship with two different intra - and inter-domain approach reduces the the trust computational complexity ; take into account the impact of time on the trust , the introduction of a sliding window for each grid node through window sliding solve the trust decay with time , so The results of the assessment more accurate. Secondly, the existing trust evaluation mechanism can not be a good solution to the attenuation of the trust over time , constructed a time correction function to trust correction , and proposed a trust evaluation method based on sliding window . Set a dynamic sliding window by adjusting the window size and window mobile grid node assessment , the trust information is updated in a timely manner in order to arrive at the present time the most accurate trust ; direct trust and recommended trust weighted average for the calculation of the trust , and correction time correction function , reflecting the trust globally . Finally , using the GridSim simulation toolkit to design a grid environment file sharing system simulation experiments , experimental verification from two evaluation of the validity of the model and the accuracy of the model the trust model SWTrust based on sliding window and performance analysis.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Computer network > General issues > Computer Network Security
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