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In June 2013, numerous top-secret documents were disclosed, revealing shocking evidence about mass surveillance methods and projects that were undergoing in global scale. These revelations had deep impact in political and industrial level and they sparked huge debates over surveillance, security mechanisms and privacy enforcement. Simultaneously, these revelations led to the introduction of many strong...
Providing users with a lot of information might sound ideal in many scenarios, nonetheless, this may often be very annoying for the end user. To limit the amount of information that has to be processed by the user, to a set that is more relevant for his needs, most service providers use recommender systems. Undoubtedly, to provide someone with proper recommendations, one needs some background knowledge...
Intelligent Transportation Systems are being widely adopted, within the framework of context aware scenarios, as a fundamental element within Smart Cities. Applications span from passenger comfort, transportation logistics and safety/emergency systems. Within the different transportation systems, motorcycles and motorbikes are of great interest- due to their wide adoption in dense urban environments,...
In an attempt to make our cities more sustainable and resource efficient, we are transforming them into what we now call Smart Cities. This transformation is heavily dependent on ICT, where a huge network of interconnected sensors and other devices is deployed to monitor many aspects of urban life in real-time. Recently, Solanas et al. [1] introduced the concept of Smart Health (s-Health) in which...
The unprecedented global shift towards cities is drastically changing the urban environment. With the aim to mitigate the problems that these changes may introduce , cities are gradually being transformed into the so-called “Smart Cities”. This transformation involves the deployment of numerous sensors and communication infrastructures that are used to provide better management and resource allocation...
Online Social Networks (OSNs) are currently playing a crucial role in our everyday social life. Their great growth has sparked the interest of hackers and individual users that try to disclose as much information as possible, which in many cases unfortunately is possible. In such events, the users’ privacy settings are bypassed by the leakage of their shared media content. To address this challenging...
Due to the rise of social media, several new needs, problems and challenges have emerged in users' privacy and security policies. Two very serious problems that should be addressed are identity theft and unauthorized content sharing. In this work we propose a more secure scheme for privacy in social networks by the use of watermarking that manages to diminish these problems, at least inside current...
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