A major vector of computer infection is through exploiting software or design flaws in networked applications such as the browser. Malicious code can be fetched and executed on a victim’s machine without the user’s permission, as in drive-by download (DBD) attacks. In this paper, we describe a new tool called DeWare for detecting the onset of infection delivered through vulnerable applications....

The multimedia document generator, iClass system, has been used by professors from the Institutes of Chemistry, Mathematics and Computer Science from the University of São Paulo aiming at helping the multimedia content production and availability. Data from user interactions, available in iClass system, have motivated this work which aims at studying the user behavior under different circumstan...

In this paper we describe a proposal for embedding hidden marks in the web pages of a complex web site with the aim of simplifying the process of collecting and analyzing users’ behavior. Usually, server log files are used for tracking user actions, but these files present typical drawbacks due to their huge size and the lack of discrimination between user actions and automated responses. We pr...

Nowadays social media, such as Twitter and all kinds of online forums, becomes a platform where people can express their opinions implicitly or explicitly. For example, in Twitter, people follow people they trust, and retweet the tweets they agree. In online forums, such as PoliticalForum.com, people explicitly express their opinions and interact with each other using text. Our goal is to under...

In this paper we present a set of simulation models to more realistically mimic the behaviour of users reading messages. We propose a User Behaviour Model, where a simulated user reacts to a message by a flexible set of possible reactions (e.g. ignore, read, like, save, etc.) and a mobility-based reaction (visit a place, run away from danger, etc.). We describe our models and their implementati...

This paper presents the results of a recent study of people's presence and their interactions with the buildings' environmental systems in a number of buildings in Austria. The intention was to observe user control actions pertaining to building systems while considering the indoor and outdoor environmental conditions under which those actions occurred. The results of this study suggest that su...

Microsoft’s Bing takes a different approach to web search. Why do we call Bing a “decision engine” and what are the unique benefits this approach provides to users? This talk will describe the vision and design principles of Bing and how this translates into what we build. Behind the code there is a great deal of customer research and a few fundamental insights that motivate our designs. Evalua...

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