News
DISCO Member Dr. Ivan Martinovic receives a Carl-Zeiss Scholarship
DISCO is proud that its member Dr. Ivan Martinovic received a postdoctoral scholarship from the Carl-Zeiss foundation. This generous scholarship has the goal to promote the research of promising young academics for the period of two years with a financial support of 160.000 Euro. More information can be found at Carl-Zeiss Stiftung Web Page and some additional media coverage . Congratulations Ivan!
DISCO is growing
The DISCO team welcomes a new research member: Hao Wang from China, who has successfully received his M.Sc. degree from the University of Kaiserslautern. His research interests are in (Stochastic) Network Calculus.
New Wireless Security Lecture starting in SS 2009!
The new security lecture Security in Wireless Networks starts in summer term 2009. In this lecture students will gain an understanding of security problems, their possible solutions, and different design trade-offs within most relevant existing and upcoming wireless technologies.
DISCO again at ACM WiSec
Our paper Jamming for Good: A Fresh Approach to Authentic Communication in WSN has been accepted for publication at this years ACM Conference on Wireless Network Security (WiSec). In this paper, we justified that the wireless frequency jamming can be turned against an adversary by introducing and evaluating the concept of attack cancelation, a security protocol which prevents legitimate sensor nodes from receiving impersonated and unauthenticated transmissions. In contrast to the conventional "receive, verify, reject" authentication principle, attack cancelation prevents legitimate devices from receiving fake data at all. Check out the paper from our Publications page.
DISCO@GI/ITG KiVS 2009
The DISCO group will be attending the 16th GI/ITG Conference on Communication in Distributed Systems (KiVS 2009) from March 2 to 5, 2009 in Kassel, Germany. We will be presenting several aspects of our work:
- A tutorial on Stochastic Network Calculus, an analytical framework for stochastically relaxed worst-case analysis in networks.
- A work on extending network calculus to non-FIFO systems.
- A work on using wireless communication characteristics for data authentication in wireless sensor networks.
- DiscoSec, our DoS-resilient WLAN driver.
Frau Hofbauer (Sekretariat) geht in Ruhestand
Unsere Sekretärin Frau Hofbauer geht zum 1.8. in den wohlverdienten Ruhestand - leider. Frau Erlewein (Geb. 36 / Raum 430) wird ab sofort unser Sekretariat übernehmen. Wir freuen uns sie im DISCO-Team begrüßen zu dürfen.
DISCO@IEEE's NPSec'08
The DISCO Team proudly announces the acceptance of a paper at IEEE's 4th Workshop on Secure Network Protocols (NPSec 2008) which will be held in conjunction with the 16th IEEE International Conference on Network Protocols (ICNP2008) in Orlando, Florida (USA). Our paper Enabling Authentic Transmissions in WSNs - Turning Jamming against the Attacker proposes a novel crypto-free approach for providing message authentication in WSNs by leveraging channel capacity jamming to prevent authentic nodes from receiving malicious data.
DiscoSec@IEEE's WOWMOM 2008
DISCO team is proud to announce that the paper: "Design, Implementation, and Performance Analysis of DiscoSec – Service Pack for Securing WLANs" got accepted as a noteworthy contribution (acceptance rate of 7%) at the 9th IEEE International Symposium on a World of Wireless, Mobile and Multimedia Networks (WOWMOM 2008). In this paper we describe DiscoSec, the protection against various attacks based on unauthenticated management frames in IEEE 802.11 networks. DiscoSec offers an efficient management frame authentication and a DoS-resilient key exchange adapted to peculiarities of wireless communication. As a proof-of-concept, we offer DiscoSec as an open-source wireless device driver (available for dowload from our Downloads section).
DISCO@GI/ITG MMB 2008
The DISCO group will be attending the 14th GI/ITG Conference on Measurement, Modeling, and Evaluation of Computer and Communication Systems (MMB 2008) from March 31 to April 2, 2008 in Dortmund, Germany. We will be presenting several aspects of our work:
- A tutorial on Stochastic Network Calculus, an analytical framework for stochastically relaxed worst-case analysis in networks.
- A work on using genetic algorithms for sink-placement in wireless sensor networks.
- The DISCO Network Calculator as a tool to perform automated network calculus analysis.
DISCO@ACM's WiSec08
The DISCO Team is proud to present a paper at the ACM Conference on Wireless Network Security in Alexandria, Virginia, USA. This highly selective conference accepted only 16 from 96 submitted papers (17% acceptance rate). In our paper: Wireless Client Puzzles in IEEE 802.11 Networks: Security by Wireless we proposed a protection method against resource-depletion attacks of wireless access points. Utilizing wireless client puzzles the access point is able to efficiently discard fake authentication requests, while at the same time allows other legitimate clients to successfully join the network.
DISCO@INFOCOM08
DISCO was successful at next year's IEEE INFOCOM conference and got the paper "Delay Bounds under Arbitrary Multiplexing: When Network Calculus Leaves You in the Lurch ..." accepted. INFOCOM is the premier conference on all aspects of data communication and is highly selective with an acceptance rate of 15% of the submitted papers. In the last five years, there have been only two accepted German contributions to the INFOCOM conference.
DISCO@RTSS07
The DISCO team will present a paper at the IEEE Real-Time Systems Symposium (RTSS) in Tucson, Arizona, USA in December 2007. RTSS is the premier conference for real-time systems and is very selective with an acceptance rate of 20% of the papers submitted. The title of DISCO's paper is "A Comprehensive Worst-Case Calculus for Wireless Sensor Networks with In-Network Processing" and is in collaboration with the ETH Zurich (Prof. Lothar Thiele).
Jens Schmitt in WS07/08 guest professor at ETH Zürich
Prof.Dr. Jens Schmitt takes a sabbatical in the coming winter semester 2007/8. He has been appointed a guest professor at ETH Zürich. In particular, a research cooperation with the Computer Engineering and Networks Laboratory led by Prof.Dr. Lothar Thiele in the area of distributed real-time systems is envisioned.Consequently, no classes by Prof. Schmitt will be taking place in WS07/08, with the only exception of the Performance Evaluation of Distributed Systems project. Exam dates can be arranged through Prof. Schmitt secretary, Frau Hofbauer.
DISCO@MASCOTS 2007
Our paper Energy-Efficient TDMA Design Under Real-Time Constraints in Wireless Sensor Networks has been accepted at the 15th Annual Meeting of the IEEE International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS 2007).
DISCO@Q2SWiNet 2007
Our paper Regional-based Authentication Against DoS Attacks in Wireless Networks has been accepted at this year's ACM Workshop on Quality of Service and Security for Wireless Networks (Q2SWiNet 2007). This workshop, which has a selective acceptance rate, takes place in conjunction with the 10th ACM/IEEE International Symposium on Modeling, Analysis and Simulation of Wireless and Mobile Systems (MSWiM).
DISCO@EW2007
DISCO Team together with one of our students Adam Bachorek is proud to present a paper (pdf) at this year's 13th European Wireless conference held in Paris. European Wireless is the largest annual European conferences on wireless communication and networking. In our paper we have investigated the new IEEE 802.11i security standard and made quantitative evaluations about its performance within a realistic mobile scenario.
DISCO@SEC2007
At this year's IFIP International Information Security Conference (SEC 2007), the DISCO team is presenting a publication (pdf) on security attacks against a web-based authentication which is frequently used by wireless hotspots. This publication is a joint work by the DISCO team and our research students Christian Jung and Adam Bachorek, who analyzed the behaviour of various access points under different DoS attacks and discovered new techniques of wireless client hijacking and access point impersonation.
IFIP SEC is an international and world-wide recognised conference on information systems security with selective acceptance rate (around 25% over previous years).
DISCO is growing
The DISCO team welcomes three new research staff members: Wint Yi Poe from Myanmar who is a fellow from the Daimler-Benz foundation, Christiane Bortoleto who is funded by a DAAD stipend, and Nicos Gollan, who is working in a joint project with the Networked Systems Lab in the frame of the DASMOD cluster of excellence.
DISCO@IWSOS2006
The DISCO team will present two papers at the International Workshop for Self-Organizing Systems (IWSOS'06) Passau. The IWSOS'06 has been selective in accepting submission (25%). One of the DISCO papers is on mechanisms to self-protect against malicious users in P2P networks (P2PSelfProtection.pdf). The other one is on self-organizing large-scale WLAN networks based on virtualization of radio resources (SO-WLAN.pdf)
DISCO@Networking2006
The DISCO team will present two papers at the IFIP Networking 2006 conference in Coimbra, Portugal. The Networking conference is a selective conference typically only accepting 25% of the papers submitted. One of the DISCO papers is on mechanisms to avoid denial-of-service attacks in WLANs (DoSinWLAN.pdf). The other one is on dimensioning wireless sensor networks such that they can provide delay guarantees based on sensor network calculus (WSNDimensioning.pdf)
Web-Site Relaunch
Two and a half years after the initial DISCO Lab web-site went online, it was time for a major facelift. We hope you like it and you will come back.
Network Calculus Library Released
DISCO Lab is proud to present the first release of the DISCO Network Calculator, a network calculus library. This library contains a number of classes written in Java(tm) which may be useful for analysing data flows in communication networks in order to determine worst-case bounds for various flow characteristics such as the maximum latency or the minimum bandwidth.
The DISCO Network Calculator is available from our download section.
DISCO@SIGMETRICS
AG DISCO missachtet "Wir müssen draußen bleiben" bei SIGMETRICS-Konferenz
Die Arbeitsgruppe für Verteilte Systeme (disco | Distributed Computer Systems Lab) hat bei der diesjährigen ACM-Konferenz SIGMETRICS das Kunststück geschafft, nach langer Zeit mal wieder einen deutschen Beitrag zu platzieren. Dies ist in den letzten 20 Jahren nur 2 deutschen Arbeitsgruppen überhaupt gelungen. Dieses Ergebnis wurde in Zusammenarbeit mit der NTNU Trondheim erzielt.
Die SIGMETRICS-Konferenz ist eine der prestigeträchtigsten weltweiten Informatik-Konferenzen und ist die wichtigste Konferenz im Bereich der Leistungsmodellierung und -analyse von Computersystemen. Sie ist äußerst selektiv und hat in den letzten Jahren lediglich höchstens 10% der eingereichten Beiträge angenommen.
Der akzeptierte SIGMETRICS-Beitrag der Arbeitsgruppe DISCO beschäftigt sich mit der Entwicklung eines neuartigen verteilten Systemkalküls, der dazu dienen soll, die Performanz verschiedenster verteilter Systeme, sei es das Internet oder aber auch drahtlose Sensornetze, exakt zu modellieren und damit kontrollierbar zu machen. Prof. Schmitt, der Leiter der Arbeitsgruppe, sieht mit diesem Beitrag das Fundament für die Vorhersagbarkeit und Kontrollierbarkeit und damit der Verlässlichkeit großer verteilter Systeme geschaffen. In Anbetracht von Zukunftsvisionen wie der Allgegenwärtigkeit von intelligenten Komponenten im Alltag und der Umwelt (Ambient Intelligence) stellt diese Verlässlichkeit eine kritische Systemanforderung dar.
- Den Beitrag finden Sie hier: pdf