Cloud computing, reliability and security issue

Cloud computing with its utilities is one of the realities that the most of the industrial and educational has a dream. However, the cloud computing has the potential to solve a lot of problems (such as easy sharing, transform a large part of the IT industry) but still the performance, reliability, and the security is the most issues that still need to test and measured. This paper is the survey paper, which focuses on these three issues to identify them and discuss about the solutions, which proposed until today.