5,275 research outputs found
E-Id Authentication and Uniform Access to Cloud Storage Service Providers
Abstract-This article describes an architecture for authentication and uniform access to protected data stored on popular Cloud Storage Service Providers. This architecture takes advantage of the OAuth authentication mechanism and the strong authentication mechanism of the National Electronic Identity (E-Id) Cards , in our case the Portuguese E-Id card or Cartão de Cidadão (CC). We shall present a comparison of authentication mechanisms and access to popular cloud storage providers, comparing the different authentication mechanisms OAuth 1.0, OAuth 1.0a and OAuth 2.0. Using the proposed architecture we have developed an implementation of this architecture that provides a uniform web based access to popular Cloud Storage Service Providers such as Dropbox, Skydrive, Cloudpt and Google Drive using the authentication mechanism of the E-Id card as a unique access token. In order to provide a uniform access to these services we shall describe the differences in the various REST APIs for the targeted providers. Finally the web application that allows users that hold E-Id cards a single point of access to their various cloud storage services will be presented
Characterizing and providing interoperability to function as a service platforms
Dissertação para obtenção do Grau de Mestre em Engenharia Informática e de ComputadoresA computação sem servidor abstrai o controlo da infraestrutura dos programadores e executa código a pedido com escalonamento automático onde apenas se é cobrado pela quantidade de recursos consumidos. Um dos serviços mais populares da computação sem servidor é a Função como Serviço (Function-as-a-Service ou FaaS), onde os programadores são muitas vezes confrontados com requisitos especÃficos dos prestadores de
serviços de nuvem. Requisitos de assinatura das funções, e o uso de bibliotecas exclusivas ao prestador de serviços, foram identificados como sendo as principais causas de problemas de portabilidade das aplicações FaaS. O controlo reduzido da infraestrutura e a elevada dependência para com o prestador de serviços dá origem a diversos problemas de aprisionamento tecnológico. Neste trabalho, introduzimos o QuickFaaS, uma ferramenta para desktop de interoperabilidade multi-cloud com foco principal no desenvolvimento de funções agnósticas à nuvem e na criação das mesmas na respetiva plataforma. O QuickFaaS permite melhorar
substancialmente a produtividade, flexibilidade e agilidade no desenvolvimento de soluções sem servidor para múltiplos prestadores de serviços, sem o requisito de instalar software adicional. A abordagem agnóstica à nuvem irá permitir que os programadores reutilizem as suas funções em diferentes prestadores de serviços sem terem a necessidade de reescrever código. A solução visa a minimizar o aprisionamento tecnológico
nas plataformas FaaS através do aumento da portabilidade das funções sem servidor, incentivando assim programadores e organizações a apostarem em diferentes prestadores de serviços em troca de um benefÃcio funcional.Serverless computing hides infrastructure management from developers and runs code on-demand automatically scaled and billed during code’s execution time. One of the most popular serverless backend services is called Function-as-a-Service (FaaS), in which developers are many times confronted with cloud-specific requirements. Function signature requirements, and the usage of custom libraries that are unique to cloud
providers, were identified as the two main reasons for portability issues in FaaS applications. Such reduced control over the infrastructure and tight-coupling with cloud services amplifies various vendor lock-in problems.
In this work, we introduce QuickFaaS, a multi-cloud interoperability desktop tool targeting cloud-agnostic functions development and FaaS deployments. QuickFaaS substantially improves developers’ productivity, flexibility and agility when creating serverless solutions to multiple cloud providers, without requiring the installation of extra software. The proposed cloud-agnostic approach enables developers to reuse their serverless functions in different cloud providers with no need to rewrite code. The solution aims to minimize vendor lock-in in FaaS platforms by increasing the portability of serverless functions, which will, therefore, encourage developers and organizations to target different providers in exchange for a functional benefit.N/
Keyword-Based Delegable Proofs of Storage
Cloud users (clients) with limited storage capacity at their end can
outsource bulk data to the cloud storage server. A client can later access her
data by downloading the required data files. However, a large fraction of the
data files the client outsources to the server is often archival in nature that
the client uses for backup purposes and accesses less frequently. An untrusted
server can thus delete some of these archival data files in order to save some
space (and allocate the same to other clients) without being detected by the
client (data owner). Proofs of storage enable the client to audit her data
files uploaded to the server in order to ensure the integrity of those files.
In this work, we introduce one type of (selective) proofs of storage that we
call keyword-based delegable proofs of storage, where the client wants to audit
all her data files containing a specific keyword (e.g., "important"). Moreover,
it satisfies the notion of public verifiability where the client can delegate
the auditing task to a third-party auditor who audits the set of files
corresponding to the keyword on behalf of the client. We formally define the
security of a keyword-based delegable proof-of-storage protocol. We construct
such a protocol based on an existing proof-of-storage scheme and analyze the
security of our protocol. We argue that the techniques we use can be applied
atop any existing publicly verifiable proof-of-storage scheme for static data.
Finally, we discuss the efficiency of our construction.Comment: A preliminary version of this work has been published in
International Conference on Information Security Practice and Experience
(ISPEC 2018
QuickFaaS: providing portability and interoperability between FaaS Platforms
Serverless computing hides infrastructure management from developers and runs code on-demand automatically scaled and billed during the code's execution time. One of the most popular serverless backend services is called Function-as-a-Service (FaaS), in which developers are often confronted with cloud-specific requirements. Function signature requirements, and the usage of custom libraries that are unique to cloud providers, were identified as the two main reasons for portability issues in FaaS applications, leading to various vendor lock-in problems. In this work, we define three cloud-agnostic models that compose FaaS platforms. Based on these models, we developed QuickFaaS, a multi-cloud interoperability desktop tool targeting cloud-agnostic functions and FaaS deployments. The proposed cloud-agnostic approach enables developers to reuse their serverless functions in different cloud providers with no need to change code or install extra software. We also provide an evaluation that validates the proposed solution by measuring the impact of a cloud-agnostic approach on the function's performance, when compared to a cloud-non-agnostic one. The study shows that a cloud-agnostic approach does not significantly impact the function's performance.info:eu-repo/semantics/publishedVersio
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