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Matthias Wählisch

Matthias Wählisch Address:

Institute of Computer Science
Freie Universität Berlin
Takustr. 9
14195 Berlin
Germany

Room: 164

Email: m.waehlisch@fu-berlin.de
          waehlisch@ieee.org

Phone: +49 30 838 75209
Fax: +49 30 838 75194

Office Hours: Stop by, or write an email to make an appointment.

Research Areas


I joined the working group Computer Systems & Telematics (CST) at the Institute of Computer Science, Freie Universität Berlin as PhD student and research assistant in May 2009, after graduating from the same university. I am an associated member of the Internet Technologies (INET) research group at the HAW Hamburg, and a co-founder of link-lab.

Projects

If you are looking for a bachelor/master thesis or project topic in one of the research areas, please, do not hesitate to contact me.

Ongoing

RPKI The RTRlib is an open-source C implementation of the RPKI/Router Protocol client. The library allows to fetch and store validated IP prefix origin data from a cache as well as the origin verification of IP prefixes. It supports different types of transport sessions (e.g., SSH, unprotected TCP) and is easily extendable. The library helps to secure the Internet backbone routing protocol, BGP. More information is available on the project homepage.
Routing Atlas The Internet was originally shaped as a fully decentralized, cooperative packet transport system that offered transmission services to those who were willing to inter-connect. Its scalable architecture aimed at supporting a global information infrastructure without the requirement of national contributions, regulations or governmental support. Meanwhile the Internet has matured to an almost mission-critical infrastructure for global communication, but also for enabling key operations of public administration and business affairs, of research, education, and entertainment within individual countries. In this project, we identify, characterize, and visualize the fraction of the Internet that serves as the nation-centric communication system of Germany. Starting from the RIPE database and harvesting several additional databases, route monitors and Internet measurement projects, we extract the minimal routing graph that interconnects all members, as well as a subset of relevant players within the German Internet. The results may help to identify IP prefix hijacking or weak transits. Preliminary results have been published here and here.
SKIMS The objective of SKIMS lies in the design, development and implementation of a cross-layer security system for mobile devices. Detection mechanisms as well as a proactive and reactive defense of attacks are core components of this project. The vision of a digital immune system will be demonstrated in a proof of concept in terms of an extended security application for mobile phones. Analog to a traffic light system, the mobile signals the current level of risk to the user and relaxes the status wherever applicable. This transparency allows users to regain trust that was lost previously in insecure environments. More information is available on the SKIMS homepage.
HAMcast The objective of HAMcast lies in the development and practical analysis of a component for group communication as part of a multiservice Internet architecture. Encapsulated by an application-transparent API, HAMcast enables the global provisioning of a hybrid, adaptive multicast service. Its architecture will follow an evolutionary model using a universal service middleware that does neither require a deployment by providers, nor dedicated network implementations by application programmers. All results will be deployed within the German Lab (G-Lab) and may serve as the basis for new, group-oriented systems and applications. HAMcast includes (a) Open Multi-Service Architecture, (b) Universal, Layer-Transparent API, (c) Mobility-Transparent Routing, (d) ISP Service Interaction between Overlay and Underlay, and (e) Experimentally Driven Optimization and Refinement. The FU Berlin is an associated partner. More information is available on the HAMcast homepage.
REALMv6 REALMv6 is an open initiative to investigate and accelerate protocols and deployment in the field of real-time and multicast mobility in IPv6. The research targets at a next generation mobile Internet and includes applications for a mobile, IPv6-enabled Internet, analysis of handover performance & optimization as well as concepts and corresponding analysis for evolving IPv6 mobility protocols. More information is available on the realmv6 homepage.
AuthoCast Mobile multicast scenarios like IPTV or group conferencing are likely to soon extend into the mobile world: A sportscaster (without support of tradional, expensive broadcasting equipment) may feed its live stream from a sailing regatta to an Internet TV channel. But how to prevent an attacker from hijacking this open Internet channel? AuthoCast defines a protocol scheme that allows for authentication of mobile Multicast senders in native IP and overlay networks. More information is available on the AuthoCast homepage.
hylOs The Hypermedia Learning Object System (hylOs) is an adaptive eLearning content management system and runtime environment, built upon a sophisticated information object model tailored from the IEEE LOM (Learning Object Metadata) standard. hylOs comprises instructional design concepts and tools, a content acquisition and analysis engine for semi-automated generation and annotation of eLearning Objects, as well as an Ontological Evaluation Layer for concluding relations between eLearning Objects, bundled with a sophisticated repository and platform-independent authoring environment. More information is available on the hylOs homepage.

Completed

Moviecast The aim of the project Moviecast is the design and development of an Internet based videoconference solution for mobile devices. The solution will consist purely in software, ready to run on standard devices (PDAs) under current operating systems (e.g. Windows Mobile). All software components will be standard compliant. The result of the project will be a highly optimized software library, which encodes and decodes video streams in real-time and supports user and session mobility as well as secured and optimized mobile group communication. More information is available on the Moviecast homepage.

Honors and Awards

Awards

Travel Grants

Publications & CV

Professional Activities

Co-Organization

TPC and Reviewer

Standardization

Expert Evaluator

Invited Talks

Interviews

Teaching

Bachelor / Master Theses

Open

In addition to the following explicit calls, please, do not hesitate to contact me if you are interested in one of my research areas or projects. Decide on an area of interest and we can discuss a specific thesis topic, which is not listed below.

Ongoing

Finished

Courses

WS 2011/12: PS Technische Informatik
SoSe 2011: PS Technische Informatik
S Seminar Technische Informatik
WS 2010/11: PS Technische Informatik
S Seminar Technische Informatik
SoSe 2010: PS Technische Informatik
S Technische Informatik - Network Organization and Protocols
WS 2009/10: V/Ü Telematik
S Technische Informatik - Mobile Ad-hoc Networks
PS Technische Informatik
© 2009 Freie Universität Berlin, AG CST

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