云计算的概念越来越流行，而且云计算被认为是一种强大的商业模式，使用云计算，可以根据需要购买计算能力、磁盘存储、协作应用开发资源、客户关系管理（CRM），而且它非常灵活。但是采用云计算仍然存在很多的安全隐患和管理难题，例如确我们需要定没有把企业数据或者任何个人信息或其它机密信息至于风险之中。-Increasingly popular concept of cloud computing, and cloud computing is considered to be a powerful business model, the use of cloud computing, according to need to purchase computing power, disk storage, collaborative application development resources, customer relationship management (CRM), and it Very flexible. However, the cloud is still a lot of security risks and management challenges, such as do not we need to set the enterprise data or any personal information or other confidential information The risk.