Trust model of web services based on subjective logic
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A new method is put forward after analyzing the problem of traditional subjective trust valuation model,and the improved trust valuation model is applied to web service environment.Make the web service entity within environment can automatically renew with the increase of bargain number.Finally,simulation experiments show that the improved trust valuation model can better reflect the entity trust degree in web service.Keywords:
Subjective logic
Web of trust
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Social web permits users to acquire information from anonymous people around the world. This leads to a serious question about the trustworthiness of information and sources. During the last decade, numerous models were proposed to model social trust in the service of social web. Trust modeling follows two main axes, local trust (trust between pair of users), and global trust (user's reputation within the community). Subjective logic, is an extension of probabilistic logic that deals with the cases of lack of evidences. An elaborated local trust model based on subjective logic already exists. The aim of this work is to apply this model to the first time on a real data set. Then, we propose another global trust model based also on subjective logic. We apply both models on a real data set of a question answering social network that aims to assist people to find solutions to their technical problems in various domains. Our proposed global trust model ensures a better performance thanks to its precise interpretation of the context of trust, and its ability to satisfy new arrived users.
Subjective logic
Web of trust
Social trust
Trust anchor
Social network (sociolinguistics)
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To overcome the problem of poor quality of service caused by malice,fraud and dishonest service entities in dynamic and complex internet,the paper constructs a trust reasoning and evolution system.It is mainly composed of the public and entity trust evolution systems and based on the Open Grid Services Architecture(OGSA).This paper proposes a trust reasoning method to change the situation of trust missing and trust generalization,which constrained by the trusty entities,the entity set,successive approximation of evaluation entities,etc.The trust reasoning system could greatly enrich trust relationship among entities and distinguish conspiracy through deduction,inversion and recursion.It is capable of overcoming the problem aroused by the lack of direct trust and early stage trust in the traditional trust evolution.Therefore,it changes traditional methodology on trust relationship modeling.Based on the new trust reasoning and evolution method,we propose a Web service composition strategy.The practical example and testing results demonstrate the effectiveness of the new strategy on distinguishing potential risk in entity behavior,overcoming the problem of entity experience differences,and improving the success rate of services composition.
Web of trust
Malice
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With the continuous study of Web services,considering the role of the service structure has become a hot issue.This paper proposes a service trust management model because of service user,provider and service.Subject trust information of providers has been modified by users’feedback information.Information from service composition corrected the object trust of service.At last,requesters can get more exact service recommendation based on service trust.
Service level objective
Differentiated services
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The existing problems in the subjective trust valuation model and the performances of the whole model were improved.The weight parameter was introduced which indicated the importance of various trust degrees.And at last,the improved model was proved to be better in describing trust relations and be able to enhance the security of Web services by taking simulation experiments.
Web of trust
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Choosing reliable Web Services is a key issue for distributed software in the Web Services collaborative environment.In order to handle this problem,this paper proposes a Web Service trust evaluation approach based on collaborative frequency clustering.The approach is based on the method of sociological trust model and clusters Web Services according to the collaborative frequency among the Web Service nodes.The concepts of single trust degree,group trust degree and comprehensive trust degree are proposed and a trust evaluation model for Web Service is given.An evaluation framework of Web Service trust based on global and local trust management is designed.By building Web Services depository,the evaluation model is used to simulate the Web Services.Experimental results show the Web Service evaluation method is feasible and valid.
WS-Policy
Web analytics
Web of trust
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Openness to experience
Web of trust
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The existence of malicious service provider could damage the correctness and availability of e-commerce systems based on web service. So a new authentic trust model for web service e-commerce is present in this paper. It says that the trust for web service e-commerce is comprised of the trust degree of service business and the trust degree of customer evaluation. During trust degree computing, service time, business sum and service result should be thought about. In additional, we should consider service object and trust degree of service business when computing the trust degree of customer evaluation. Simulation experimental results show that the new trust Model can distinguish between normal service and malicious service. Especially, it's an effective action to identify that the business is just a small sum business for upgrade trust value with a big sum business for cheat and trust value's upgrade from group cheat.
Trust anchor
Service level objective
Web of trust
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To realise commercial application of web service, research on its trust and reputation model should be raised into the agenda. After all, short of trust and reputation evaluation, web service will be trustless, which is not propitious for its development. Considering the feature of web service and existing trust and reputation evaluation methods, a trust evaluation model supporting domain distinction for web service is put up. The model measures trust and reputation of web service from two roles: requestor and provider. And its measuring content includes: service function and its QoS. To take more interest in recommendation of web service from similar domain, it combines domain factors as weighted average to compute recommendation trust. The simulation indicates that it works well on evaluation of trust even on the conditions of fake services and opinions disturbance.
Trust anchor
WS-Policy
Web of trust
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Internet-Based Web application systems are gradually built as software service coordination systems. In an open, dynamic and changeful application environment, trust is an important thing for security and reliability of software services and systems. In this paper, first an Agent-based software service coordination model is presented. Then a trust valuation model is given to value trust relationships between software services. Trust is abstracted as a function of subjective expectation and objective experience, and a reasonable method is provided to combine the direct experience and the indirect experience from others. In comparison with an other's work, a complete trust valuation model is designed, and its reasonability and operability is emphasized. This model can be used in coordination and security decision between software services.
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