Research on Security Services of Cloud Computing

In order to promote the application development of cloud computing and strengthen the cloud security construction,the paper analyses the problems faced in the cloud security services from the aspects of cloud infrastructure services,cloud environment trust control,cloud transmission security management,cloud security application services,and so on.It concludes that only building up the security system based on cloud integrated protection,cloud environment trust platform,trusted chain transmission platform and cloud security defense system can the changing security threats in the cloud computing application be really resolved,which can also provide service for IT fields and information security fields.