Trust-Enhanced Cloud Service Selection Model Based on QoS Analysis

Cloud computing technology plays a very important role in many areas, such as in the construction and development of the smart city. Meanwhile, numerous cloud services appear on the cloud-based platform. Therefore how to how to select trustworthy cloud services remains a significant problem in such...

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Bibliographic Details
Published in:PloS one 2015-11, Vol.10 (11), p.e0143448-e0143448
Main Authors: Pan, Yuchen, Ding, Shuai, Fan, Wenjuan, Li, Jing, Yang, Shanlin
Format: Article
Language:English
Subjects:
Automation
Cloud computing
Cloud Computing - standards
Clouds
Collaboration
Correlation coefficient
Correlation coefficients
Decision making
Diminishing marginal utility
Education
Humans
International conferences
Internet service providers
Laboratories
Mathematical models
Models, Theoretical
Quality of service
Recommender systems
Similarity
Social networks
Social organization
Social research
Studies
Technology assessment
Trust
Trustworthiness
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Summary:Cloud computing technology plays a very important role in many areas, such as in the construction and development of the smart city. Meanwhile, numerous cloud services appear on the cloud-based platform. Therefore how to how to select trustworthy cloud services remains a significant problem in such platforms, and extensively investigated owing to the ever-growing needs of users. However, trust relationship in social network has not been taken into account in existing methods of cloud service selection and recommendation. In this paper, we propose a cloud service selection model based on the trust-enhanced similarity. Firstly, the direct, indirect, and hybrid trust degrees are measured based on the interaction frequencies among users. Secondly, we estimate the overall similarity by combining the experience usability measured based on Jaccard's Coefficient and the numerical distance computed by Pearson Correlation Coefficient. Then through using the trust degree to modify the basic similarity, we obtain a trust-enhanced similarity. Finally, we utilize the trust-enhanced similarity to find similar trusted neighbors and predict the missing QoS values as the basis of cloud service selection and recommendation. The experimental results show that our approach is able to obtain optimal results via adjusting parameters and exhibits high effectiveness. The cloud services ranking by our model also have better QoS properties than other methods in the comparison experiments.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0143448