中文摘要：

针对复杂云计算环境,提出一个推荐辅助的信任协商框架。云服务请求者首先从好友处获得所需服务的提供者候选,然后根据服务提供者的信任值综合考虑最终的提供者。信任的评估是双向的,服务提供者同样可以查询服务请求者的信任值,并以此判断是否提供服务。同时设计了相应的信任协商协议,保证云环境下的用户能够借助服务等级协议实现对服务相关参数的协商,并据此计算用户的信任值。模拟实验显示该设计能够提供复杂云环境下服务提供商和请求者间的双向互信。

英文摘要：

For a complex cloud computing environment, a recommended aided trust negotiation framework is proposed. The cloud service requester first obtains the provider candidate for the desired service from the friends, and then considers the final provider according to the trust value of the service provider. Trust evaluation is two-way, the service provider can also query the service requestor, s trust value, and to determine whether to provide services. At the same time, the corresponding trust negotiation protocol is designed to ensure that the users in the cloud environment can use service level agreement to negotiate the service-related parameters and calculate the trust value of the user. The simulation experiments show that the design can provide two-way mutual trust between the service providers and the requestors in the complex cloud environment.