中文摘要：

云计算是最快的成长和流行计算机技术之一，并且基于云计算有越来越多的企业服务。以便节省费用，越来越，企业和他们的雇员雇用了企业云服务，并且逐渐地放了在云的重要信息。云服务系统成为了恶意的攻击的主要目标。然而，云计算技术仍然不是完成式，和管理，企业云服务的维护与云计算的传统的网络服务相比是更复杂的。那么，企业云服务是更可能的遇到一些安全问题，并且这些安全问题的影响规模是宽广的。但是企业云服务的安全上有很少研究。在这篇论文，我们分析服务(SaaS ) 企业云满足的软件并且在云计算环境介绍安全问题的研究地位。与特征的分析和 SaaS 企业云的应用程序建筑学结合满足，我们建议安全问题分析模型，分析系统体系结构和关系模型。我们的研究能支持答案的自动产生的进一步的研究并且指导 SaaS 企业云服务的安全政策的推广。

英文摘要：

Cloud computing is one of the fastest growing and popular computer technologies, and there are more and more enterprise services based on the cloud computing. In order to save costs, more and more enterprises and their employees have hired the enterprise cloud services, and put much important information in the cloud gradually. Cloud service systems have become the main targets of malicious attacks. However, the cloud computing technologies are still not perfect, and the management and maintenance of enterprise cloud services are more complex compared to traditional network services of cloud computing. So, enterprise cloud services are more likely to encounter some security problems, and the influenced scale of these security problems is broad. But there are few researches on the security of enterprise cloud services. In this paper, we analyze the software as a service（Saa S） enterprise cloud services and introduce the research status of security problems in cloud computing environment. Combining with the analysis of the characteristics and application architecture of Saa S enterprise cloud services, we propose the security problems analysis model, the analysis system architecture and the relational model. Our researches can support further research of the automatic generation of solutions and guide the deployment of security policies of Saa S enterprise cloud services.