Data security is a major issue in the digital world. Cryptography is the most use technique for data security. Cryptography is one of the principle of protection of digital data. Encryption and decryption ensure the data confidentiality. The effectiveness of the encryption security depends on the key management, while RSA algorithm uses two keys. Public key is used to encrypt the data, this key can be used by anyone to encrypt. Private Key is used only to decrypt the data. If the private key is leaked that means the security system cannot protect any data. The Perfection of the encryption depends on the key management and the internal mathematics method of the algorithm. In this paper we propose an encryption method using AES and RSA algorithm. This encryption method can be used for cloud computing, desktop data and database data security.