Survey Paper on REMO with Replication

Cloud storage allows users to remotely store their data and get the on-demand high quality cloud applications without the pressure of local hardware and software management. Though the benefits are clear, such a service is also give up users’ physical acquisition of their outsourced data, which unavoidably poses new security risks toward the correctness of the data in cloud. In order to point out this new problem and further acquire a secure and dependable cloud storage service, we put forth in this paper a flexible distributed storage integrity auditing mechanism, utilizing the homomorphic token and distributed erasure-coded data. The put forth design allows users to audit the cloud storage with very less communication and computation cost. The auditing result not only guarantees strong cloud storage correctness guarantee, but also simultaneously acquire fast data error localization, i.e., the identification of misbehaving server. Considering the cloud data are dynamic in nature, the put forth design further supports secure and efficient dynamic operations on outsourced data, block modification, deletion, and append. Analysis shows the put forth scheme is highly efficient and resilient against Byzantine attack, malicious data update attack, and even server colluding attacks.