PERIKLIS is a Greek National project for the development of an innovative e-Government platform for public services, using mobile and social network technologies. PERIKLIS consists of a content management system for publishing, editing and modifying content in both desktop and mobile and a middleware framework containing core functionalities and intelligence. The main services of the platform i...

By leveraging the capabilities of modern GPS-equipped mobile devices providing social-networking services, the interest in developing advanced services that combine location-based services with social networking services is growing drastically. Based on geo-social networks that couple personal location information with personal social context information, such services are facilitated by geo-so...

Some types of social networking applications installed in the mobile devices require users to share own locations while using them. Adversaries glean users’ private information through shared locations via social networking application and public available geographic data. In this paper, we propose a user sensitive privacy-preserving location sharing system to avoid leaking. Users define sensit...

Over the past decade, digital and mobile media have significantly changed the system of political communication in Brazil. An increasing number of Brazilian candidates have begun to use websites and social networking applications as an integral part of their overall campaign efforts. To explore how these "new" media tools are used at all levels of campaigns for national office, we built an orig...

Mobile data traffic grew by more than 50 percent between the first quarters of 2019 and 2020 is projected to grow close a factor 5 reach 164 exabytes per month 2025. This insatiable demand for mobile broadband communication services, including video, social networking, web browsing, audio, software updates, peer-to-peer file sharing, has been driven both rising number smartphone subscriptions i...

The rapid developments of mobile devices and online social networks have resulted in increasing attention to Mobile Social Networking (MSN). The explosive growth of mobile-connected and location-aware devices makes it possible and meaningful to do the Proximity-based Mobile Social Networks (PMSNs). Users can discover and make new social interactions easily with physical-proximate mobile users t...