The importance of cloud computing is increasing enormously and receives a great attention from the scientific community. The Cloud Computing offers a wide range of benefits, but also a major challenge from the point of view of security, in fact security remains the main obstacle to success. Migration of legacy systems to the cloud gives us the opportunity to take control over security in legacy systems. The process called SMiLe2Cloud aims to solve the problem of secure migration legacy information systems to cloud. This paper aims to present a case study on the design of the migration of the security features of a legacy application to Cloud providers by using the process called SMiLe2Cloud.