Cloud computing is a model for convenient on-demand user’s access to changeable and configurable computing resources such as networks, servers, storage, applications, and services with minimal management of resources and service provider interaction. Task scheduling is regarded as a fundamental issue in cloud computing which aims at distributing the load on the different resources of a distribu...

Federation is currently finding a wide argumentation in Cloud Computing. The federation among cloud operators should allow new opportunities and businesses even making the role of SMEs crucial in these new scenarios. In this work, we provide a solution on how to federate Storage Cloud providers, enabling the transparent and dynamic federation among storage suppliers adding new functionalities f...

The LOCKSS system is a leading technology in the field of Distributed Digital Preservation. Libraries run LOCKSS boxes to collect and preserve content published on the Web in PC servers with local disk storage. They form nodes in a network that continually audits their content and repairs any damage. Libraries wondered whether they could use cloud storage for their LOCKSS boxes instead of local...

We consider a cloud system that has to save lots of files and has to use hundreds of computers. The existing cloud storage designs are not scalable enough to support such a huge number of nodes. In this paper, we propose a novel cloud storage system containing thousands of virtual file servers on hundreds of computers. We group these virtual servers into clusters. This system is perfectly scala...

With the continuous increase of cloud storage adopters, data deduplication has become a necessity for cloud providers. By storing a unique copy of duplicate data, cloud providers greatly reduce their storage and data transfer costs. Unfortunately, deduplication introduces a number of new security challenges. We propose PerfectDedup, a novel scheme for secure data deduplication, which takes into...

The widespread use of cloud storage in the last few years can be attributed to the existence of appealing applications such as file backup, data archival and file sharing. File sharing in particular, is implemented in different ways by distinct cloud storage services. These differences can appear at the offered permission types and in the form they are applied. We present a survey of these diff...

In cloud storage data sharing is an important utility. Most of the users attracted by cloud storage because of its numerous benefits. The idea of Key Aggregate Searchable Encryption is build through a concrete KASE scheme. In this scheme data owner distribute single trapdoor to the cloud. In this paper , we used multi cloud for storing & accessing the large amount of data because in cloud envir...

Cloud Storage provide users with storage space and make user friendly and timely acquire data, which is foundation of all kinds of cloud applications. However, there is lack of deep studies on how to optimize cloud storage aiming at improvement of data access performance. In this paper, mathematical description for cloud storage optimization is given and as a objective optimization problems whi...

Cloud Computing allows users to outsource storage and computation to servers using internet. In this paper we propose a data Deduplication technique to reduce the amount of storage space and to save bandwidth. The convergent encryption technique has been proposed to protect the confidentiality of sensitive data. Our scheme has the feature of access which allows only valid users to share the dat...

Data Deduplication is an important technique which provides better result to store more information with less space. Cost and maintenance of Information backup storage system for major enterprises can be minimized by storing it on Cloud Storage. Data redundancy between different kinds of data storage gets minimal by utilizing data deduplication method. By giving each application differently and...