Cloud computing risk assessment : a systematic literature review

International audienceCloud computing security is a broad research domain with a large number of concerns, ranging from protecting hardware and platform technologies to protecting clouds data and resource access (through different end- user devices). Although the advantages of cloud computing are tremendous, the security and privacy concerns of cloud computing have always been the focus of numerous cloud customers and impediment to its widespread adaptation by businesses and organizations. The paper presents a systematic literature review in the field of cloud computing with a focus on risk assessment. This would help future research and cloud users/business organizations to have an overview of the risk factors in a cloud environment. And to proactively map their indigenous needs with this technology

Data security and privacy on the cloud: Driving to the next era of technology with confidence

Cloud services have gained popularity due to the number of advantages they provide to organizations and individuals such as reduced cost, better storage, and improved performance. However, a lot of organizations are still not willing to shift their traditional in-house services to the Cloud due to the various security implications. Many Cloud service users are worried about the security of their data and privacy being violated. There are many reported cases of Cloud service providers illegally collecting personal data of their customers, which has led to service providers being viewed with greater suspicion than before. To overcome this, Cloud service providers must ensure that they inform the users exactly about which data is being used and how it is used. While it is the duty of the Cloud service provider to protect the data confidentiality and privacy of their customers, this should not be misunderstood or misused by customers to conduct illegal activities because Cloud service providers have to abide by the rules and regulations, including co-operating with law enforcement agencies if they need any particular customer’s data. In this paper, we research the main security aspects for ensuring data confidentiality and privacy. © Springer Science+Business Media Singapore 2018

Augmentation of the Heat Transfer Performance of a Sinusoidal Corrugated Enclosure by Employing Hybrid Nanofluid

This paper numerically examines laminar natural convection in a sinusoidal corrugated enclosure with a discrete heat source on the bottom wall, filled by pure water, Al2O3/water nanofluid, and Al2O3-Cu/water hybrid nanofluid which is a new advanced nanofluid with two kinds of nanoparticle materials. The effects of Rayleigh number (103≤Ra≤106) and water, nanofluid, and hybrid nanofluid (in volume concentration of 0% ≤ ϕ ≤ 2%) as the working fluid on temperature fields and heat transfer performance of the enclosure are investigated. The finite volume discretization method is employed to solve the set of governing equations. The results indicate that for all Rayleigh numbers been studied, employing hybrid nanofluid improves the heat transfer rate compared to nanofluid and water, which results in a better cooling performance of the enclosure and lower temperature of the heated surface. The rate of this enhancement is considerably more at higher values of Ra and volume concentrations. Furthermore, by applying the modeling results, two correlations are developed to estimate the average Nusselt number. The results reveal that the modeling data are in very good agreement with the predicted data. The maximum error for nanofluid and hybrid nanofluid was around 11% and 12%, respectively