A Cloud Approach for Secure Multi Data sharing between the Users

Cloud computing provides an economical and efficient solution for sharing group resource with cloud users. Sharing data in a multi-owner manner while preserving data and identity privacy from an untrusted cloud due to the frequent change of the membership. Cloud intend the secure multiple data sharing between the data users by using the cloud computing. By leveraging group signature and dynamic broadcast encryption techniques. Any user can share the data with other users. The storage overhead and encryption computation cost of our scheme are independent with the number of revoked users the security of our scheme with rigorous proofs, and demonstrate the efficiency of our scheme in experiments.