Abstract : Cloud data storage is the cloud computing model that allows us to save information in an isolated location and can be retrieved or accessed through internet. It is widely accepted by many organizations as it provides cost effective, elasticity and scalable alternative to store large volumes of data. As the data is outsourced, it is necessary to have security mechanisms to keep outsourced data securely. Cloud data auditing technique enables cloud user to verify the reliability of outsourced data
Keywords : User Centric Auditing System, Cloud Data Security, Privacy Preserving, user, centric