Cloud Data Auditing Using Proofs of Retrievability

Cloud servers offer data outsourcing facility to their clients. A client outsources her data without having any copy at her end. Therefore, she needs a guarantee that her data are not modified by the server which may be malicious. Data auditing is performed on the outsourced data to resolve this issue. Moreover, the client may want all her data to be stored untampered. In this chapter, we describe proofs of retrievability (POR) that convince the client about the integrity of all her data.Comment: A version has been published as a book chapter in Guide to Security Assurance for Cloud Computing (Springer International Publishing Switzerland 2015

A comprehensive meta-analysis of cryptographic security mechanisms for cloud computing

The file attached to this record is the author's final peer reviewed version. The Publisher's final version can be found by following the DOI link.The concept of cloud computing offers measurable computational or information resources as a service over the Internet. The major motivation behind the cloud setup is economic benefits, because it assures the reduction in expenditure for operational and infrastructural purposes. To transform it into a reality there are some impediments and hurdles which are required to be tackled, most profound of which are security, privacy and reliability issues. As the user data is revealed to the cloud, it departs the protection-sphere of the data owner. However, this brings partly new security and privacy concerns. This work focuses on these issues related to various cloud services and deployment models by spotlighting their major challenges. While the classical cryptography is an ancient discipline, modern cryptography, which has been mostly developed in the last few decades, is the subject of study which needs to be implemented so as to ensure strong security and privacy mechanisms in today’s real-world scenarios. The technological solutions, short and long term research goals of the cloud security will be described and addressed using various classical cryptographic mechanisms as well as modern ones. This work explores the new directions in cloud computing security, while highlighting the correct selection of these fundamental technologies from cryptographic point of view

D3S - a distributed storage service

The Internet growth allowed an explosion of service provision in the cloud. The cloud paradigm dictates the users` information migration from the desktop into the network allowng access averyhere, anytime. This paradigm provided a adequate environment to the emergency of online storage services, such as Amazon S3. This kind of services allows storing digital data in a transparent way, in a pay-as-you-go model. This paper describes an implementation of an S3 compatible cloud storage service based on peer-to-peer networks, in particular, through the BitTorrent protocol. This approach allows taking advantage of the intrisic features of this kind of networks, in particular possibility for simultaneous downlouading of pieces from different locations and the fault tolerance

Cloud Computing Security with Identity-Based Authentication Using Heritage-Based Technique

More organizations start to give various types of distributed computing administrations for Internet clients in the meantime these administrations additionally bring some security issues. Presently the many of cloud computing systems endow digital identity for clients to access their services, this will bring some drawback for a hybrid cloud that includes multiple private clouds and/or public clouds. Today most cloud computing framework use asymmetric and traditional public key cryptography to give information security and common authentication. Identity-based cryptography has some attraction attributes that appear to fit well the necessities of cloud computing. In this paper, by receiving federated identity management together with hierarchical identity-based cryptography (HIBC) with cloud heritage technique, not only the key distribution but also the mutual validation can be rearranged in the cloud