The power of the Web is enhanced through the network effect produced as resources link to each other with the value determined by Metcalfe's law. In Web 2.0 applications, much of that effect is delivered through social linkages realized via social networks online. Unfortunately, the associated semantics for Web 2.0 applications, delivered through tagging, is generally minimally hierarchical and...

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The idea that people use the Web and make the Web at the same time is an interesting starting point to study it. Personal homepages, blogs and similar websites can be studied as a social network phenomenon because social characteristics can explain their nature and dynamic. We present a computational Agent-Based model of personal web communities. Agents maintain their homepages and the web netw...

The Web has been chosen as a basic infrastructure to gain the social structure information, through the social network extraction, from all over the world. However, most of the web documents are unstructured and lack of semantics. Moreover, that network is subject to all kinds of changes and dynamics, and a network can be very complex due to the large number of nodes and links Web contains. In ...

Many Web 2.0-based social networking sites permit their users to post comments containing a variety of HTML tags on other users’ profiles. In this paper, we show that allowing arbitrary users to post multimedia HTML content on other users’ social network profiles is an attack vector. Specifically, we demonstrate three attacks— the Social-DDoS attack, the Social-C&C attack, and the Browserchokin...

Security and privacy have emerged as important issues owing to the proliferation of social networking site. Sharing and distribution of relationship-based information on social network sites can have a serious impact on an individual’s activity; moreover, it can exert a negative influence on the overall information society. To solve security and privacy issues of social networking, we introduce...

Everyone agrees that user interactions and social networks are among the cornerstones of “Web 2.0”. Web 2.0 applications generally run in web browser, propose dynamic content with rich user interfaces, offer means to easily add or edit content of the web site they belong to and resent social network aspects. Well-known applications that have helped spread Web 2.0 are blogs, wikis, and image/vid...

BACKGROUND The Emerging Infections Network is a mature electronic network that links Public Health professionals in the Asia Pacific through regular e-mail bulletins and an extensive Web site (http://www.apec.org/infectious). Emerging infections is a new area of study; learning materials help foster education. Our objective is to quantify the response of the network to the introduction of dista...

Social login is a double-redirection mechanism whereby a Web application delegates user authentication to a social site and obtains access to the user’s social context. Today social login is implemented using OAuth, which requires registration of the application with the site for authentication of the application to the site and identification of the application to the user by the site. As soci...