A heterogeneous mobile cloud computing model for hybrid clouds

Mobile cloud computing is a paradigm that delivers applications to mobile devices by using cloud computing. In this way, mobile cloud computing allows for a rich user experience; since client applications run remotely in the cloud infrastructure, applications use fewer resources in the user's mobile devices. In this paper, we present a new mobile cloud computing model, in which platforms of volunteer devices provide part of the resources of the cloud, inspired by both volunteer computing and mobile edge computing paradigms. These platforms may be hierarchical, based on the capabilities of the volunteer devices and the requirements of the services provided by the clouds. We also describe the orchestration between the volunteer platform and the public, private or hybrid clouds. As we show, this new model can be an inexpensive solution to different application scenarios, highlighting its benefits in cost savings, elasticity, scalability, load balancing, and efficiency. Moreover, with the evaluation performed we also show that our proposed model is a feasible solution for cloud services that have a large number of mobile users. (C) 2018 Elsevier B.V. All rights reserved.This work has been partially supported by the Spanish MINISTERIO DE ECONOMÍA Y COMPETITIVIDAD under the project grant TIN2016-79637-P TOWARDS UNIFICATION OF HPC AND BIG DATA PARADIGMS

Verificação da robustez das palavras-passe de forma distribuída e voluntária através da WWW

A segurança da informação tem vindo a ganhar cada vez mais importância nas organizações, e esse aumento é devido aos processos de negócios e o suporte de funções por sistemas informação informatizados. Um dos mecanismos de controlo de acesso mais usados no mundo da segurança da informação é a autenticação por palavra-passe. No entanto, é também um dos mecanismos de autenticação mais problemáticos, porque sua segurança depende da robustez da palavra-passe escolhida. As organizações devem se preocupar com a qualidade das palavras-passe e determinar a robustez das palavras-passe como medida de segurança. Este trabalho pretende aplicar computação distribuída através da Web, utilizando navegadores da Web e computação voluntária, para verificar a robustez das palavras-chave. Usa um servidor Web Node.js e através do Javascript permite gerir as tarefas que são distribuídas e executadas por utilizadores finais voluntários. O suporte técnico é baseado em WebWorkers no navegador da Web. Pretende-se avaliar a qualidade do sistema proposto em comparação com os resultados obtidos com outras ferramentas, como "John the Ripper" e "Hashcat". Desta forma, podemos ver se a computação distribuída baseada no navegador da Web, pode ser um valor acrescentado em contribuir para a segurança da informação através da contribuição para promover palavras-passe mais robustas.Information security has become increasingly important in organizations, and this increase is mostly due to business processes and functions supported by computerized information systems. One of the most commonly used access control mechanisms in the world of information security is password-based authentication. However, it is also one of the most problematic authentication mechanisms, because its security depends mostly on the robustness of the selected password. Organizations should be concerned with the quality of passwords and determine the robustness of passwords as a security measure. This work intends to apply Web distributed computing, using Web browsers and voluntary computing, to verify passwords robustness. It uses a Node.js web server and implements Javascript logic to enable and manage the tasks that are distributed and executed by voluntary end-users. The system is based on Web Workers within the Web browser. In order to validate the developed system its results were compared with other tools such as “John the Ripper” and “Hash cat”. This way, it will be possible to validate if the distributed computation based on the Web browser, can contribute to information security through the promotion of more robust passwords