AN EFFICIENT SECURE DATA SHARING AND PRIVACY PRESERVING APPLICATION FOR CLOUD DATA

Abstract

With almost unlimited storage capacity and low maintenance cost, cloud storage becomes a convenient and efficient 
way for data sharing among cloud users. However, this introduces the challenges of access control and privacy 
protection when data sharing for multiple groups, as each group usually has its own encryption and access control 
mechanism to protect data confidentiality. In this project, we propose a multiple-group data sharing scheme with 
privacy preservation in the cloud. This scheme constructs a flexible access control framework by using group 
signature, ciphertext-policy attribute-based encryption and broadcast encryption, which supports both intra-group and 
cross-group data sharing with anonymous access. Furthermore, our scheme supports efficient user revocation. The 
security and efficiency of the scheme are proved thorough analysis and experiments