Abstract: In this study, we present an enhancement of data transferred security mechanism in the cloud. We suggest providing a secret key that is exchanged securely between cloud server and cloud group members. This secret key is used to encrypt data transferred using symmetric encryption. Furthermore, batch rekeying method will be applied to develop a rekeying technique for securing group communication in cloud applications. The proposed rekeying technique will be designed to have the following properties: improve system efficiency by reducing the percentage of wasted computing resources and reducing the number of message signing, eliminate out-of-synchronization problem and ensure forward and backward secrecy.