Annual Report 2010 - Fachgruppe Informatik an der RWTH Aachen ...

novel concept for Wi-Fi sharing communities. Mobile Access spans a number of problem
domains ranging from networking and network security to application design and paradigms
for disruption-tolerant mobile applications. The heart of Mobile ACcess' security and network
components is the PISA Internet sharing architecture (see above).
Mobile ACcess: Authentication of Mobile Devices and infrastructure and Mobility
Management
René Hummen, Tobias Heer, Klaus Wehrle
Device mobility plays an important role in the Mobile Access scenario. A user’s mobile
device should be able to connect to the community network once and stay connected while
moving as long as network coverage permits. Furthermore, the community-driven aspects of
Mobile Access are based on the provisioning of authenticated access to the Internet through
trusted entities within the community network in a decentralized fashion. In order to enable
both node mobility and node authentication, we maintain an implementation of the Host
Identity Protocol (HIP) called HIP for Linux (HIPL). Our research focuses on achieving fast
handovers and on developing protocol extensions that allow for efficient in-network
establishment of authenticity of the communicating peers and their generated data streams.
Mobile ACcess: User-provided Services for Mobile Devices
Hanno Wirtz, Tobias Heer, Klaus Wehrle
The proliferation of powerful mobile devices turns users that previously only acted as clients
in a network into potential service providers. For example, cameras, GPS-modules and
powerful CPUs provide input sources as well as computational resources on mobile devices.
In our research, we investigate whether mobile users with such devices can act as service
providers to other users in a municipal Wi-Fi network such as Mobile ACcess. Furthermore,
the appropriate infrastructure and security and privacy concerns are the focus of our work.
Mobile Access: Wi-Fi based user localization
Nicolai Viol, Klaus Wehrle
The ability to dynamically adapt information and contend of applications respectively to the
users position is the key feature of novel, so called location aware services. However,
167