Cloud computing hosts and delivers many different services via Internet. There are a lot of reasons why people opt for using cloud resources. Cloud development is increasing fast while a lot of related services drop behind, for example the mass awareness of cloud security. However the new generation uploads videos and pictures without reason to cloud storage, but only few know about data privacy, data management and the proprietary of stored data in the cloud. In an enterprise environment the users have to know the rule of cloud usage; however they have little knowledge about traditional IT security. It is important to measure the level of their knowledge and evolve the training system to develop the security awareness.