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The GSM technologies plays vital role in pervasive computing environments. The open and dynamic nature of the pervasive computing environment allows entities to join and leave frequently. This causes a large number of autonomous entities to interact in an ad-hoc manner, raising concerns as to the trustworthiness of the service providers. Thus service providers are not willing to share their resources to the anonymous users for fear of a potential security violation. To handle the issue of anonymous resource access, a policy based trust management system must grant user access of resources and information based on trustworthiness rather than the conventional technique map access rights authorization.
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