Stephan Groß

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— Following Mark Weiser's vision of ubiquitous computing and calm technology, computer systems should run in the background, preferably without the user noticing it at all. The gathering and disclosure of contextual information on the one hand enables the improvement of system behaviour towards a more autonomous and adaptive behaviour but on the other hand(More)
The recent development of the Internet, especially the expanding use of social software and dynamic content generation commonly termed as Web 2.0 enables users to find information about almost every possible topic on the Web. On the downside, it becomes more and more difficult to decide which information can be trusted in. In this paper we propose the(More)
Cloud Computing, i. e. providing on-demand access to virtu-alised computing resources over the Internet, is one of the current mega-trends in IT. Today, there are already several providers offering cloud computing infrastructure (IaaS), platform (PaaS) and software (SaaS) services. Although the cloud computing paradigm promises both economical as well as(More)
The development of the WPA and IEEE 802.11i standards have vastly improved the security of common wireless LAN setups. However, many installations still use the broken WEP protocol or even run with no security settings enabled. Furthermore, several threats are only partially addressed by the new security standards, e.g. rogue access points or denial of(More)
Virtualization and broadband Internet connections enabled what is known today under the term cloud. Benefits like scalability and cost reduction by pay per use agreements are accompanied by potential harm to the users data. Since existing cloud solutions can be considered synonymous with unknown locations and potentially hostile environments security(More)