Energy-Efficient Outsourced Authentication for Auditing Dynamic Data and Sharing with Multi-User

Smartphone authentication mechanisms. Such as PIN, Graphical Passwords and Fingerprint Scans. It is used for login time security it is not designed to provide security after login (post-login). The use of cloud storage it’s easier for sharing data with Multi-User. Many times smartphone is easily fall into hands of the unauthorised user so that personal information and behavioral biometric information which processed on device are need to be secured. It is done by uploading encrypted template information on the cloud storage or server and perform authentication to identify the user using privacy-preserving protocols. The techniques such as dynamic data, public integrity auditing using this techniques the original data owner is modifying the shared data, it is limits of this technique to all client are read only applications. We illustrate the energy overhead of Existing privacy preserving protocols to save power at time of continuous authentication on Smartphones. Also we use a new data integrity auditing technique for sharing data store on cloud. This new proposed technique use a public auditing, high error detection, user revocation and multiuser modification. Our propose system avoids user impersonation attack. It is not considering in existing systems that support Multi User modification on cloud storage.