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Rogerio de Paula

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Publications by Rogerio de Paula (bibliography)

» 2005 «

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Redmiles, David F., Wilensky, Hiroko, Kosaka, Kristie and Paula, Rogerio de (2005): What ideal end users teach us about collaborative software. In: GROUP05: International Conference on Supporting Group Work November 6-9, 2005, Sanibel Island, Florida, USA. pp. 260-263. Available online

“Many studies have evaluated different uses of collaborative software. Typically, the research has focused on the shortcomings and, sometimes, the ways end users succeed or fail to work around these shortcomings. In a recent field study, surprisingly, a group demonstrated unimpaired dexterity using a full range of collaborative software. Some interesting lessons emerged from observing these \"perfect\" collaborators. Lessons include implications for more typical or \"less than perfect\" end users, especially around the adoption of collaboration technology. Also, there is a general, but subtle, lesson that studying successful users of technology (or \"ideal end users\" as we put it) can be as valuable as studying those who struggle with technology and highlight its shortcomings.”

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Paula, Rogerio de, Ding, Xianghua, Dourish, Paul, Nies, Kari, Pillet, Ben, Redmiles, David F., Ren, Jie, Rode, Jennifer Ann and Filho, Roberto Silva (2005): In the eye of the beholder: A visualization-based approach to information system security. In International Journal of Human-Computer Studies, 63 (1) pp. 5-24

“Computer system security is traditionally regarded as a primarily technological concern; the fundamental questions to which security researchers address themselves are those of the mathematical guarantees that can be made for the performance of various communication and computational challenges. However, in our research, we focus on a different question. For us, the fundamental security question is one that end-users routinely encounter and resolve for themselves many times a day -- the question of whether a system is secure enough for their immediate needs. In this paper, we will describe our explorations of this issue. In particular, we will draw on three major elements of our research to date. The first is empirical investigation into everyday security practices, looking at how people manage security as a practical, day-to-day concern, and exploring the context in which security decisions are made. This empirical work provides a foundation for our reconsideration of the problems of security to a large degree as an interactional problem. The second is our systems approach, based on visualization and event-based architectures. This technical approach provides a broad platform for investigating security and interaction, based on a set of general principles. The third is our initial experiences in a prototype deployment of these mechanisms in an application for peer-to-peer file sharing in face-to-face collaborative settings. We have been using this application as the basis of an initial evaluation of our technology in support of everyday security practices in collaborative workgroups.”

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Paula, Rogerio de, Ding, Xianghua, Dourish, Paul, Nies, Kari, Pillet, Ben, Redmiles, David F., Ren, Jie, Rode, Jennifer Ann and Filho, Roberto Silva (2005): Two experiences designing for effective security. In: Proceedings of the 2005 Symposium on Usable Privacy and Security 2005. pp. 25-34. Available online

“In our research, we have been concerned with the question of how to make relevant features of security situations visible to users in order to allow them to make informed decisions regarding potential privacy and security problems, as well as regarding potential implications of their actions. To this end, we have designed technical infrastructures that make visible the configurations, activities, and implications of available security mechanisms. This thus allows users to make informed choices and take coordinated and appropriate actions when necessary. This work differs from the more traditional security usability work in that our focus is not only on the usability of security mechanism (e.g., the ease-of-use of an access control interface), but how security can manifest itself as part of people's interactions with and through information systems (i.e., how people experience and interpret privacy and security situations, and are enabled or constrained by existing technological mechanisms to act appropriately). In this paper, we report our experiences designing, developing, and testing two technical infrastructures for supporting this approach for usable security.”

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» 2004 «

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Paula, Rogerio de (2004): Lost in translation: a critical analysis of actors, artifacts, agendas, and arenas in participatory design. In: Clement, Andrew and Besselaar, Peter Van den (eds.) PDC 2004 - Proceedings of the Eighth Conference on Participatory Design July 27-31, 2004, Toronto, Ontario, Canada. pp. 162-172. Available online

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