An authentication approach for data sharing in cloud environment for dynamic group

Authentication and data privacy is an important aspect in Cloud computing. In this research work to ensure authentication and data privacy a Group Key Authentication (GKA) protocol is proposed and implemented. This defined protocol provides authentication and data privacy with reasonable authentication time and data reduce data traffic in the Cloud computing and simultaneously increases the Quality of Service (QoS). In addition, this work also aims in providing an access control based on group signatures in cloud based services. To achieve this access control scheme, a dual grand access control mechanism is formulated. This scheme will manage multi-groups and validate the group certificates of users in the cloud environment. Extensive evaluations have been carried out on the analytical model to verify the effectiveness and the correctness of the proposed system.