Disposing of Duplicate Data with Dynamic PoS for Multi User Environment

Dynamic Proof of Storage (PoS) is a profitable custom that empowers a customer to see the respectability of outsourced reports and invigorate the records in a cloud server with an extraordinarily compelling way. Despite the likelihood that a couple of agents have formed unmistakable dynamic PoS in unit customer circumstances, however the inconvenience in multi-customer conditions has not been asked inside and out. A shrewd multi-customer appropriated capacity structure needs the ensured client side cross-customer deduplication framework, that gives a customer to avoid the exchanging strategy and getting the responsibility for records now, once resulting proprietors of a similar archives have exchanged them to the cloud server. To minimal complex of our data, no other present dynamic PoS will support this system. In this paper, we are talented to exhibit the possibility of deduplicatable dynamic check of limit related propose a saving improvement suggested as DeyPoS, to recognize dynamic PoS and secure cross-customer duplication, meanwhile. Considering the troubles of structure contrasts and individual name period, we tend to abuse an exceptional instrument insinuated as Homomorphic Authenticated Tree (HAT). We have a tendency to show the protection of our advancement

Secure Multilevel Data Authentication System in Cloud Environment

Dynamic Proof of Storage is a useful cryptographic primitive that enables a user to check the integrity of outsourced files and to efficiently update the files in a cloud server. Though researchers have planned several dynamic PoS schemes in single user environments, the matter in multi-user environments has not been investigated sufficiently. A sensible multi-user cloud storage system wants the secure client-side cross-user de-duplication technique, that permits a user to skip the uploading method and procure the possession of the files now, once alternative house owners of an equivalent files have uploaded them to the cloud server. To the simplest of our data, none of the present dynamic PoS will support this system. during this paper, we have a tendency to introduce the conception of de-duplicatable dynamic proof of storage associated propose an economical construction referred to as DeyPoS, to realize dynamic PoS and secure cross-user duplication, at the same time. Considering the challenges of structure diversity and personal tag generation, we have a tendency to exploit a unique tool referred to as Homomorphic Authenticated Tree (HAT). We have a tendency to prove the protection of our construction, and therefore the theoretical analysis and experimental results show that our construction is economical in follow

MEDAPs: secure multi-entities delegated authentication protocols for mobile cloud computing

Since the technology of mobile cloud computing has brought a lot of benefits to information world, many applications in mobile devices based on cloud have emerged and boomed in the last years. According to the storage limitation, data owners would like to upload and further share the data through the cloud. Due to the safety requirements, mobile data owners are requested to provide credentials such as authentication tags along with the data. However, it is impossible to require mobile data owners to provide every authenticated computational results. The solution that signers’ privilege is outsourced to the cloud would be a promising way. To solve this problem, we propose three secure multi-entities delegated authentication protocols (MEDAPs) in mobile cloud computing, which enables the multiple mobile data owners to authorize a group designated cloud servers with the signing rights. The security of MEDAPs is constructed on three cryptographic primitive identity-based multi-proxy signature (IBMPS), identity-based proxy multi-signature (IBPMS), and identity-based multi-proxy multi-signature (IBMPMS), relied on the cubic residues, equaling to the integer factorization assumption. We also give the formal security proof under adaptively chosen message attacks and chosen identity/warrant attacks. Furthermore,compared with the pairing based protocol, MEDAPs are quite efficient and the communication overhead is nearly not a linear growth with the number of cloud servers. Copyright⃝c 2015 John Wiley & Sons, Ltd

Efficient Public Integrity Checking for Cloud Data Sharing with Multi-User Modification

Abstract—In past years a body of data integrity checking techniques have been proposed for securing cloud data services. Most of these work assume that only the data owner can modify cloud-stored data. Recently a few attempts started considering more realistic scenarios by allowing multiple cloud users to modify data with integrity assurance. However, these attempts are still far from practical due to the tremendous computational cost on cloud users. Moreover, collusion between misbehaving cloud servers and revoked users is not considered. This paper proposes a novel data integrity checking scheme characterized by multi-user modification, collusion resistance and a constant computational cost of integrity checking for cloud users, thanks to our novel design of polynomial-based authentication tags and proxy tag update techniques. Our scheme also supports public checking and efficient user revocation and is provably secure. Numerical analysis and extensive experimental results show the efficiency and scalability of our proposed scheme. I

Data Auditing and Security in Cloud Computing: Issues, Challenges and Future Directions

Cloud computing is one of the significant development that utilizes progressive computational power and upgrades data distribution and data storing facilities. With cloud information services, it is essential for information to be saved in the cloud and also distributed across numerous customers. Cloud information repository is involved with issues of information integrity, data security and information access by unapproved users. Hence, an autonomous reviewing and auditing facility is necessary to guarantee that the information is effectively accommodated and used in the cloud. In this paper, a comprehensive survey on the state-of-art techniques in data auditing and security are discussed. Challenging problems in information repository auditing and security are presented. Finally, directions for future research in data auditing and security have been discussed

Data auditing and security in cloud computing: issues, challenges and future directions

Cloud computing is one of the significant development that utilizes progressive computational power and upgrades data distribution and data storing facilities. With cloud information services, it is essential for information to be saved in the cloud and also distributed across numerous customers. Cloud information repository is involved with issues of information integrity, data security and information access by unapproved users. Hence, an autonomous reviewing and auditing facility is necessary to guarantee that the information is effectively accommodated and used in the cloud. In this paper, a comprehensive survey on the state-of-art techniques in data auditing and security are discussed. Challenging problems in information repository auditing and security are presented. Finally, directions for future research in data auditing and security have been discusse