Cloud computing is an up-and-coming technology and shared information, resources, software and hosting to customer on a pay-as-you-use basis. The major issues in cloud computing is the data protection security and it reduce the growth of the cloud computing. The security needs during the transmission of sensitive data and critical application to shared cloud environment. For secure communication over public network data can be protected by the method of encryption. So the proposed encryption techniques for secure data transmission, SSL over RSA with magic square provide add-on security to cryptosystem. To provide the confidentiality and integrity of data-in-transmission to and from cloud providers In this paper cryptographic methods RSA are discussed and combine Magic Square algorithm with RSA when implementing on data security in cloud computing.