RIGOROUS PUBLIC AUDITING SUPPORT ON SHARED DATA STORED IN THE CLOUD BY PRIVACY-PRESERVING MECHANISM

Cloud storage systems allow data owners to host their data on cloud servers and users (data consumers) can access thei r data from cloud servers. The paradigm of data hosting service also introduces new security challenges,which requires an independent auditing service to check the data integrity in the cloud server. Generally security in cloud is achieved by signing the data block before sending to the cloud server. Moreover,users should use cloud storage like the local storage and they didn�t worry about the integrity of the data. In large - scale cloud storage systems,the data may be updated dynamically,so existing rem ote integrity checking methods served for static archive data are no longer applicable to check the data integrity. Thus,efficient and secure dynamic auditing protocols desired to convince data owners that the data is correctly stored in the cloud. The pu blic auditability for cloud data storage security is of critical importance so that users can resort to an external audit party to check the integrity of stored data when needed. To securely introduce an effective third party auditor (TPA),these are:1) TPA should be able to efficiently audit the cloud data storage without demanding the local copy of data,and introduce no additional on - line burden to the cloud user;2) The third party auditing process should bring in no new vulnerabilities towards user d ata privacy. In this paper,we propose a secure cloud storage system supporting privacy - preserving and public auditing https://www.ijiert.org/paper-details?paper_id=14055