云环境中基于承诺的信任计算机制的研究

Research on compliance based trusted computer mechanism in cloud environment

可信计算在云计算领域中是最具挑战性的问题之一。云用户在许多服务提供商所提供的相似服务之间进行可信度的鉴别变得越来越复杂,需要有一些机制使用户确定服务提供商的可信度,使他们选择良好可信度的服务提供商,这些机制能够约束服务提供商的行为。尽管存在许多方法来建立服务提供商和用户之间的信任,但是,在SLA承诺的QOS参数协商中形成的信任机制对服务提供商几乎没有任何约束。本文设计和模拟了一个通过基于双方协商SLA参数承诺来计算服务提供商的可信度的机制,并用MATLAB仿真,用虚拟数据集来进行验证,结果表明,该方法是可行的,能够用来在云环境下评估服务提供商的可信度。

Trusted computer is one of the most challenging issues in cloud computing area.It is becoming increasingly complex for cloud users to make distinction among service providers offering similar kinds of services.There must be some mechanisms in the hands of users to determine trustworthiness of service providers so that they can select service providers with highly trustworthy.Though various approaches exist to form trust between service providers and users,little work has been done in the area of forming trust based on compliance of QoS parameters which have been promised in SLA.In this paper an attempt has been made to design and simulate a mechanism to calculate trustworthiness of service providers based on their compliance to promised SLA parameters.The model has been simulated in MATLAB.The validation has been done using synthetic data set.Validation results show that approach is workable and can be used to evaluate trustworthiness of service providers in a cloud environment.