Thienne Johnson

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Existing representations of the Internet do not provide information on why countries have a bigger Internet presence (e.g., Internet Service Providers) than others. In this paper we evaluate four geo-economic parameters (area, population, GDP and GDP per capita), looking for clues of why some areas or countries have developed ear-lier/later, faster/slower(More)
The growth of the elderly population in many countries makes it necessary to develop appropriate technologies for them. These include mobile phones, as they are increasingly becoming cheaper and more widespread. Furthermore, many families would like their elderly relatives to use this technology as a means of fostering digital inclusion. However, the(More)
—Detecting malicious traffic streams in modern computer networks is a challenging task due to the growing traffic volume that must be analyzed. Traditional anomaly detection systems based on packet inspection face a scalability problem in terms of computational and storage capacity. One solution to this scalability problem is to analyze traffic based on IP(More)
We propose a novel visualization, IMap, which enables the detection of security threats by visualizing a large volume of dynamic network data. In IMap, the Internet topology at the Autonomous System (AS) level is represented by a <i>canonical map</i> (which resembles a geographic map of the world), and aggregated IP traffic activity is superimposed in the(More)