Open Theses

24 Entries found

RSS


Android Grows Apples: Enabling High-Throughput Cross-Platform Direct Wireless Communication

Bachelor Thesis, Master Thesis, Diploma Thesis, Practical Course, Project


Many of todays as well as future mobile applications rely on direct wireless communication between smartphones such as file sharing, media streaming, gaming, as well as disaster communication.

In the Android world, you can use Wi-Fi Direct to interconnect mobile devices, while in the Apple world, there is the Apple Wireless Direct Link (AWDL) protocol. Currently, the only working cross-platform technology is Bluetooth which only offers very limited bandwidth.

In this work, you will implement the recently reverse-engineered AWDL protocol in the Linux OS or the Nexmon Framework. AWDL uses channel hopping and synchronization which requires tight bounds on timing making a driver implementation inevitable.

Towards Metropolitan-scale DTNs with 1.000.000 Users and Realistic Communication Habits

Bachelor Thesis, Master Thesis, Diploma Thesis, Practical Course, Project


Disruption/Delay-Tolerant Networks (DTNs) have been proposed as a means to provide communication to the population when infrastructure-based networks (e.g., cellular network) has been destroyed by a natural disaster or brought down by a cyber attack. In DTNs, end user devices (smart phones) relay messages for each other using direct wireless communication such as Wi-Fi or Bluetooth.

Many works have attempted to improve these networks by proposing novel routing protocol strategies and buffer management schemes. However, evaluation of such networks has so far only been carried out via simulation and a rather low number of nodes (< 1000), e.g., [1].

The goal of this thesis is to investigate the feasibility of DTNs in a metropolitan scale. For this, you will have to drastically increase the scalability of an existing network simulator (e.g., the ONE [2]) to enable simulation of realistic scenarios. In the next step, you will identify problems of current routing and buffer management approaches and come up with strategies to improve their scalability.

Beam-steering is the backbone of millimeter-wave (mm-wave) networks and key to achieve data-rates of multiple gigabit per second. Nodes must steer their antennas so that they maximize the signal gain towards the intended communication partner. The state-of-the-art to find the best antenna configuration is to probe all possible antenna configurations. This process caused high overhead, especially in case of mobility when parameters must be adjusted continuously.

Beam-steering is the backbone of millimeter-wave (mm-wave) networks and key to achieve data-rates of multiple gigabit per second. Nodes must steer their antennas so that they maximize the signal gain towards the intended communication partner. In large networks with dense deployments, nodes should also encounter for interference with concurrent communication of other nodes to not impair other communication links. 

The Electrical Network Frequency describes the frequency of power lines (50Hz in Europe, 60Hz in the USA). In practice, the frequency fluctuates over time, with dips and peaks caused by the changing load situation in the network. These fluctuations have already been used in audio and video forensics to timestamp recordings. This thesis should investigate potential applications of ENF data in IT security.

Comparing Wi-Fi FullMAC and SoftMAC Implementations on the same Hardware

Bachelor Thesis, Master Thesis, Diploma Thesis, Student Research Project


In this thesis, you may interface a FullMAC Broadcom Wi-Fi chip using a SoftMAC driver to bypass the internal firmware and gain flexibility of modifying the chips behaviour. The chip may be a BCM4358 installed in Nexus 6P smartphones. Having a SoftMAC implementation, you should evaluate its performance against a FullMAC implementation by concidering processing delays and energy consumption.

Implementing an LLVM backend for Broadcom's D11 core

Bachelor Thesis, Master Thesis, Diploma Thesis, Student Research Project


Wi-Fi based Key Exchange on Android Smartphones

Bachelor Thesis, Master Thesis, Diploma Thesis, Student Research Project


TETRA Security

Bachelor Thesis, Master Thesis, Diploma Thesis


We have a basic fuzzing framework for a digital trunked radio protocol, TETRA, which is used by public services. First tests showed that devices implementing this protocol have severe security issues, for example, freezing and rebooting devices with minor packet modifications is possible. Since this technology is used by emergency services and big companies, these security issues are very critical, and hence need to be revealed and fixed.




Prof. Dr.-Ing. Matthias Hollick

Technische Universität Darmstadt
Department of Computer Science
Secure Mobile Networking Lab 

Mornewegstr. 32 (S4/14)
64293 Darmstadt, Germany

Phone: +49 6151 16-25472
Fax: +49 6151 16-25471
office@seemoo.tu-darmstadt.de

A A A | Drucken Drucken | Impressum Impressum | Sitemap Sitemap | Suche Suche | Kontakt Kontakt | Webseitenanalyse: Mehr Informationen
zum Seitenanfangzum Seitenanfang