José Jair Santanna

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Distributed Denial of Service (DDoS) attacks are an increasing threat on the Internet. Until a few years ago, these types of attacks were only launched by people with advanced knowledge of computer networks. However, nowadays the ability to launch attacks have been offered as a service to everyone, even to those without any advanced knowledge. Booters are(More)
—In 2012, the Dutch National Research and Education Network, SURFnet, observed a multitude of Distributed Denial of Service (DDoS) attacks against educational institutions. These attacks were effective enough to cause the online exams of hundreds of students to be cancelled. Surprisingly, these attacks were purchased by students from websites, known as(More)
—Distributed Denial of Service (DDoS) attacks are an increasing threat on the Internet. One of the reasons is that websites selling attacks for prices starting from $1.00 are becoming popular. These websites, called Booters, facilitate attacks by making transparent the needed infrastructure to perform attacks and by lowering the knowledge to control it. As(More)
Distributed Denial of Service (DDoS) attacks mean millions in revenue losses to many industries, such e-commerce and online financial services. The amount of reported DDoS attacks has increased with 47% compared to 2013. One of the reasons for this increase is the availability and ease of accessibility to websites, which provide DDoS attacks as a paid(More)
—Internet of Things devices being used now expose limitations that prevent their proper use in healthcare systems. Interoperability and security are especially impacted by such limitations. In this paper, we discuss today´s issues, including benefits and difficulties, as well as approaches to circumvent the problems of employing and integrating Internet of(More)
The reliability of the " Internet Census 2012 " (IC), an anonymously published scan of the entire IPv4 address space, is not a priori clear. As a step towards validation of this dataset, we compare it to logged reference data on a /16 network, and present an approach to systematically handle uncertainties in timestamps in the IC and reference data. We find(More)
Dependable operation of the Internet is of crucial importance for our society. In recent years Distributed Denial of Service (DDoS) attacks have quickly become a major problem for the Internet. Most of these attacks are initiated by kids that target schools, ISPs, banks and web-shops; the Dutch NREN (SURFNet), for example, sees around 10 of such attacks per(More)
A network path is a path that a packet takes to reach its target. However, determining the network path that a host uses to reach it's target from the viewpoint of the latter is less trivial than it appears. Tools such as Traceroute allow the user to determine the path towards a target (i.e. the forward path), but not the path from the target to the source(More)