Multi-Persona Mobile Computing

Smartphones and tablets are increasingly ubiquitous, and many users rely on multiple mobile devices to accommodate work, personal, and geographic mobility needs. Pervasive access to always-on mobile computing has created new security and privacy concerns for mobile devices that often force users to carry multiple devices to meet those needs. The volume and popularity of mobile devices has commingled hardware and software design, and created tightly vertically integrated platforms that lock users into a single, vendor controlled ecosystem. My thesis is that lightweight mechanisms can be added to commodity operating systems to enable multiple virtual phones or tablets to run at the same time on a physical smartphone or tablet device, and to enable apps from multiple mobile platforms, such as iOS and Android, to run together on the same physical device, all while maintaining the low-latency and responsiveness expected of modern mobile devices. This dissertation presents two lightweight operating systems mechanisms, virtualization and binary compatibility, that enable multi-persona mobile computing. First, we present Cells, a mobile virtualization architecture enabling multiple virtual phones, or personas, to run simultaneously on the same physical cellphone in a secure and isolated manner. Cells introduces device namespaces that allow apps to run in a virtualized environment while still leveraging native devices such as GPUs to provide accelerated graphics. Second, we present Cycada, an operating system compatibility architecture that runs applications built for different mobile ecosystems, iOS and Android, together on a single Android device. Cycada introduces kernel-level code adaptation and diplomats to simplify binary compatibility support by reusing existing operating system code and unmodified frameworks and libraries. Both Cells and Cycada have been implemented in Android, and can run multiple Android virtual phones, and a mix of iOS and Android apps on the same device with good performance. Because mobile computing has become increasingly important, we also present a new way to teach operating systems in a mobile-centric way that incorporates the concepts of geographic mobility, sensor data acquisition, and resource-constrained design considerations

Study and Development of Cross-Platform Cloogy Mobile Application for VPS – Virtual Power Solutions.

A energia renovável e a conservação de energia tornaram-se tópicos importantes nos últimos anos. As empresas têm realizado esforços para reduzir o consumo de energia através da otimização de dispositivos e da conscientização dos consumidores sobre o seu uso. Para contribuir com este esforço, a Virtual Power Solutions (VPS) fornece uma solução onde os proprietários / utilizadores de edifícios obtêm visibilidade e controle em tempo real dos seus aparelhos elétricos instalados na sua residência. A VPS alcançou com sucesso a gestão de procura, e a tecnologia de automação de edifícios numa única aplicação móvel designada por Cloogy. Esta aplicação fornece aos consumidores de energia e aos seus parceiros a capacidade de verificar e controlar o consumo de energia em tempo real, permitindo reduzir o nível de consumo ao mínimo sem comprometer as operações do dia a dia. Atualmente, a Cloogy tem suas aplicações móveis disponíveis para Android, iOS e Windows Phone com funcionalidades semelhantes. Deste modo, porem cada aplicação requer diferentes linguagens de programação para cada plataforma, o que envolve um custo para manter essas diferentes plataformas. Por esta razão, para a presente tese, a VPS appresentou o objetivo de desenvolver uma aplicação móvel híbrida, que se baseará numa base de código único e terá acesso a todas as APIs da plataforma. Diferentes tipos de ferramentas de desenvolvimento estão disponíveis para construir uma aplicação híbrida. Depois de definir os requisitos funcionais e não-funcionais, um protótipo de aplicação híbrida foi construído usando o Ionic Framework, que consiste numa das Frameworks de código aberto os disponíveis para construir aplicações móveis híbridas. Com a ajuda desta framework, uma aplicação móvel pode ser criada usando um conjunto de tecnologias da web, como JavaScript, HTML e CSS, e implementada o aplicativo em todas as principais plataformas, como Android e iOS. O protótipo construído nos permite-nos aceder a dados de consumo através do nosso smartphone ou tablet a partir de uma localização remota com a ajuda da iEnergy3 API da VPS. As principais características oferecidas pelo protótipo são a monitorização do consumo de energia através de registros e dados em tempo real, e a verificação dos indicadores de consumo como desempenho, média diária, previsões, etc. O protótipo também fornece pegadas ecológicas, conjuntamente com indicadores de consumo, e é capaz de controlar e agendar períodos de consumo de electricidade a partir de um local remoto.N/

The Dark Side(-Channel) of Mobile Devices: A Survey on Network Traffic Analysis

In recent years, mobile devices (e.g., smartphones and tablets) have met an increasing commercial success and have become a fundamental element of the everyday life for billions of people all around the world. Mobile devices are used not only for traditional communication activities (e.g., voice calls and messages) but also for more advanced tasks made possible by an enormous amount of multi-purpose applications (e.g., finance, gaming, and shopping). As a result, those devices generate a significant network traffic (a consistent part of the overall Internet traffic). For this reason, the research community has been investigating security and privacy issues that are related to the network traffic generated by mobile devices, which could be analyzed to obtain information useful for a variety of goals (ranging from device security and network optimization, to fine-grained user profiling). In this paper, we review the works that contributed to the state of the art of network traffic analysis targeting mobile devices. In particular, we present a systematic classification of the works in the literature according to three criteria: (i) the goal of the analysis; (ii) the point where the network traffic is captured; and (iii) the targeted mobile platforms. In this survey, we consider points of capturing such as Wi-Fi Access Points, software simulation, and inside real mobile devices or emulators. For the surveyed works, we review and compare analysis techniques, validation methods, and achieved results. We also discuss possible countermeasures, challenges and possible directions for future research on mobile traffic analysis and other emerging domains (e.g., Internet of Things). We believe our survey will be a reference work for researchers and practitioners in this research field.Comment: 55 page

Comparing Google's Android and Apple's iOS Mobile Software Development Environments

Mobile devices have become extremely popular during the past few years. They are used widely in business and everyday life by the young and the elderly. As the mobile devices and their operating systems have developed, the manufacturers have made it possible also for everyday users to create their own applications using specific Software Development Kits. For that reason, it is now common that applications are created not only by third party companies but also by everyone interested in the matter. The mobile business has come to a point where there are a few big companies respon-sible for developing the operating systems used by most hardware manufacturers. Of all the operating systems, there are two which have grown their market share during the past few years: Apple's iOS and Google's Android. The purpose of this thesis was to compare the two, finding out how easy they are to take into use, and to develop and publish applications with. The study was carried out as an empirical research. The research was made on both operating systems and the SDKs. Based on that knowledge, applications were created and published for both systems. The basic outline of the study was installing and work-ing with both SDKs, developing and publishing applications using the SDKs, and es-timating the costs of installing development kits in an educational environment. The objectives of this study were achieved as planned: both SDKs were successfully installed, four applications were created altogether, an estimation of costs was made and overall experience of both systems was gained

Android on x86

Computer scienc

Case Study: Porting Qt to Windows Runtime

With the abundance of operating system choices available to end-users, particularly for mobile devices, application developers look for ways to cut development time while increasing the portability and maintainability of their source code. One solution to this challenge can be found through use of cross-platform frameworks. Cross-platform frameworks function by abstracting the system-specific details of incompatible platforms into a common programming interface which developers can use to target many different devices and operating systems. This thesis studies the abstraction architecture of Qt, a leading cross-platform C++ graphical user interface framework, with the goal of bringing a new platform, Windows Runtime, to the framework's set of supported targets. Windows Runtime is a collective programming interface for the Microsoft Windows 8 family of operating systems, including Windows 8, Windows Phone 8, and Windows RT. While Qt already supports a range of desktop and mobile operating systems -- including Windows, Mac OSX, Linux/X11, Android, iOS, BlackBerry, and Sailfish -- support for Windows Runtime is a new feature of the framework brought forth by this case study. Current trends in cross-platform frameworks, particularly declarative user interface frameworks with a mobile emphasis, are assessed and compared to Qt's offering, and the implementation of Qt for Windows Runtime is prepared with these trends in mind. The implementation contributes to the open-source Qt Project, with the contributions included in the official Qt 5.3 release. Using the released version of Qt 5.3, a canonical Qt application is ported to the new platform and is certified and published in the Windows Store. Through this porting and publication process, an evaluation of the project's success is constructed within a cross-platform context. The outlook for Windows Runtime as a growing platform is positive, as is the outlook for the uptake of Qt (and cross-platform frameworks in general) within modern device ecosystems. Moving forward, the quality and feature parity of Qt for Windows Runtime (as compared to competing frameworks) is expected to improve as users and open-source contributors make this new offering part of their respective development workflows and software projects