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open ; The Internet network has received huge attentions by the research community. At a first glance, the network optimization and scalability issues dominate the efforts of researchers and vendors. Many results have been obtained in the last decades: the Internet's architecture is optimized to be cheap, robust and ubiquitous. In contrast, such a network has never been perfectly secure. During all its evolution, the security threats of the Internet persist as a transversal and endless topic. Nowadays, the Internet network hosts a multitude of mission critical activities. The electronic voting systems and financial services are carried out through it. Governmental institutions, financial and business organizations depend on the performance and the security of the Internet. This role confers to the Internet network a critical characterization. At the same time, the Internet network is a vector of malicious activities, like Denial of Service attacks; many reports of attacks can be found in both academic outcomes and daily news. In order to mitigate this wide range of issues, many research efforts have been carried out in the past decades; unfortunately, the complex architecture and the scale of the Internet make hard the evaluation and the adoption of such proposals. In order to improve the security of the Internet, the research community can benefit from sharing real network data. Unfortunately, privacy and security concerns inhibit the release of these data: its suffices to imagine the big amount of private information (e.g., political preferences or religious belief) it is possible to get while reading the Internet packets exchanged between users and web services. This scenario motivates my research, and represents the context of this dissertation which contributes to the analysis of the security issues of the Internet infrastructures and describes relevant security proposals. In particular, the main outcomes described in this dissertation are: • the definition of a secure routing protocol for the Internet ...

In today's modern information society, the online environment is a natural, ubiquitous and often irreplaceable part of working, social and private life. The Internet has spread globally in recent years and is now accessible to the vast majority of the human population, developing constantly, dynamically, and affecting, to a greater or lesser extent, all areas, spheres or sectors of human society and human life in general, including communication. On the one hand, it offers many positives to mankind, but on the other hand, it also brings many negatives in the form of its potential misuse and dissemination of false, misleading, distorted, incomplete, and/or fabricated information - misinformation. For this reason, the author of the present article uses relevant scientific methods and approaches, and as part of the interdisciplinary research, deals with disinformation as a security threat spreading on the Internet, since it enables influencing individuals, social groups, and a large part of the public, shaping their attitudes, behaviour, and perception of reality.

As we live in an increasingly networked world, cyber-threats have become much more prevalent. The United States has promoted network neutrality and the virtues of an uncensored Internet abroad. However, new laws are being proposed which allow Internet Service Providers (ISPs) to arbitrarily block or discriminate against potentially dangerous websites. This has resulted in a challenge to the freedoms and privacy highly valued by Americans and could potentially harm America's legitimacy as a leader of open Internet across the globe. Under such an environment, what should be done to create effective and responsible policies which can not only guarantee national security, but also preserve the freedoms of Internet users? Adapted from the source document.

As we live in an increasingly networked world, cyber-threats have become much more prevalent. The United States has promoted network neutrality and the virtues of an uncensored Internet abroad. However, new laws are being proposed which allow Internet Service Providers (ISPs) to arbitrarily block or discriminate against potentially dangerous websites. This has resulted in a challenge to the freedoms and privacy highly valued by Americans and could potentially harm America's legitimacy as a leader of open Internet across the globe. Under such an environment, what should be done to create effective and responsible policies which can not only guarantee national security, but also preserve the freedoms of Internet users? Adapted from the source document.