Abstract:

The paper researches and analyzes the existing credibility problem for Web services.The measurement and verification method were scarce in web service composition.An integrity measurement scheme based on the state keeping is proposed in the paper.In the way of measurement and verification of integrity,the credibility can be handed on among platforms and services.To extend the credibility from platform to service, the static measurement and verification method of atom services on trusted computing platforms are discussed.For dynamic Web service composition, an integrity measurement method is proposed based on state keeping.For uncertain situation of the service composition environment in the practical application,a locking scheme of the service provider platform is proposed so that the state of the service provider is maintained to guarantee the credibility of the service.

Key words: services composition;trusted computing;integrity measurement