Trustworthy assurance of service interoperation in cloud environment

  • Authors:

  • Bing Li;Bu-Qing Cao;Kun-Mei Wen;Rui-Xuan Li

  • Affiliations:

  • State Key Laboratory of Software Engineering, Wuhan University, Wuhan, PRC 430072;State Key Laboratory of Software Engineering, Wuhan University, Wuhan, PRC 430072 and School of Computer Science and Engineering, Hunan University of Science and Technology, Xiangtan, PRC 411201;School of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan, PRC 430074;School of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan, PRC 430074

  • Venue:
  • International Journal of Automation and Computing
  • Year:
  • 2011

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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.