Abstract
Cloud computing can be realized by service interoperation and its essence is to provide cloud services through network. The development of effective methods to assure the trustworthiness of service interoperation in cloud environment is a very important problem. The essence of cloud security is trust and trust management. Combining quality of service (QoS) with trust model, this paper constructs a QoS-aware and quantitative trust-model that consists of initial trust value, direct trust value, and recommendatory trust value of service, making the provision, discovery, and aggregation of cloud services trustworthy. Hence, it can assure trustworthiness of service interoperation between users and services or among services in cloud environment. At the same time, based on this model, service discovery method based on QoS-aware and quantitative trust-model (TQoS-WSD) is proposed, which makes a solid trust relationship among service requestor, service provider and service recommender, and users can find trustworthy service whose total evaluation value is higher. Compared to QoS-based service discovery (QoS-WSD) method, it is proved by the experiment for TQoS-WSD method that more accurate result of service discovery will be achieved by service requestor, while reasonable time cost is increased. Meanwhile, TQoS-WSD method strongly resists the effect of service discovery by untrustworthy QoS values and improves service invocation success-rate and thus assures trustworthiness of services interoperation.
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This work was supported by National Basic Research Program of China (973 Program) (No. 2007CB310801), National Natural Science Foundation of China (No. 60873083, No. 60803025, No. 60970017, No. 60903034, No. 60873225), Natural Science Foundation of Hubei Province for Distinguished Young Scholars (No. 2008CDB351), Natural Science Foundation of Hubei Province (No. 2008ABA358, No. 2008ABA379), Research Fund for the Doctoral Program of Higher Education of China (No. 20070486065), and Open Foundation of State Key Laboratory of Software Engineering (No. SKLSE20080718).
Bing Li received the Ph.D. degree from the Computer Science School of Huazhong University of Science and Technology (HUST), PRC in 2003. He worked as a post doctoral researcher in the State Key Laboratory of Software Engineering (SKLSE), Wuhan University, PRC from 2003 to 2005. Now he is a professor of School of Computer and SKLSE, Wuhan University.
His research interests include cloud computing, networked software, service-oriented software engineering, complex system and complex networks, and system integration.
Bu-Qing Cao received M. Sc. degree from Central South University, PRC in 2007. He is currently a Ph.D. candidate in the State Key Laboratory of Software Engineering (SKLSE), Wuhan University, PRC. Now he is a lecturer of School of Computer Science and Engineering, Hunan University of Science and technology, PRC.
His research interests include cloud computing, networked software, and service computing.
Kun-Mei Wen received the Ph.D. degree from the School of Computer Science and Technology of Huazhong University of Science and Technology (HUST), PRC in 2007. She is an assistant professor at the School of Computer Science and Technology, Huazhong University of Science and Technology, PRC.
Her research interests include web information search and mining, semantic search, and web information management.
Rui-Xuan Li received the Ph.D. degree from the School of Computer Science and Technology of Huazhong University of Science and Technology (HUST), PRC in 2004. He is an associate professor of School of Computer Science and Technology, Huazhong University of Science and Technology.
His research interests include cloud computing, social network, semantic web and ontology, and information integration.
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Li, B., Cao, BQ., Wen, KM. et al. Trustworthy assurance of service interoperation in cloud environment. Int. J. Autom. Comput. 8, 297–308 (2011). https://doi.org/10.1007/s11633-011-0585-1
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DOI: https://doi.org/10.1007/s11633-011-0585-1