Institut für Verteilte Systeme
Albert-Einstein-Allee 11
89081 Ulm
Sekretariat
Claudia Kastner
Telefon: +49 731 50-24140
Telefax: +49 731 50-24142
Besucheranschrift
James-Franck-Ring
Gebäude O27, Raum 349
89081 Ulm
Abschlussarbeiten
Auf dieser Seite finden Sie Informationen zu aktuell von uns angebotenen Themen für Abschlussarbeiten. Informationen zu bereits laufenden oder fertiggestellten Arbeiten finden sich auf einer Unterseite.
Hinweis zur Sprache: Im Folgenden werden die verfügbaren Themen hauptsächlich auf Englisch aufgelistet. Bei der Bearbeitung eines Thema steht es Studierenden frei, sich entweder für Deutsch oder Englisch als Sprache für die Ausarbeitung zu entscheiden.
Themen nach Abschluss
Bachelor-Arbeiten
10. 
|
Blockchain Analysis with Chronograph
Bachelor's thesis, Master's thesis or individual lab project
Institute of Distributed Systems,
2018
in Vorbereitung
Zusammenfassung: Blockchain technology allows for decentralized, distributed, and secure ledgers that store records (e.g., transactions). Popular blockchain-based systems such as Bitcoin and Etherum have emerged as so-called crypto-currencies. As the ledger maintains the full history of transactions, interactions within the system are always persisted. In this work, the student is asked to design and implement online and offline transaction analyses based on Chronograph, a data processing platform for evolving graphs developed at our Institute. Therefore, different blockchain-based systems should be surveyed and appropriate analysis mechanisms should be conducted. |
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9.
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Dependency Tracking in Distributed Retroactive Applications
Bachelor's thesis, Master's thesis or individual lab project
Institute of Distributed Systems,
2018
in Vorbereitung
Zusammenfassung: Retroactive computing enables programmatical access to the history of an application. This offers a variety of capabilities, such as computations and predictions of alternate application timelines, post-hoc bug fixes, and retroactive state explorations. Reads and writes of the application state have to be tracked and persisted in order to support retroaction. This is fairly simple for a single-writer append-only log, but entails various issues in a distributed setting. This thesis/project should explore different approaches for a distributed dependency tracking, including a prototypical implementation based on an existing platform prototype and an evaluation of the resulting artifacts. |
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8.
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Evaluation von Threshold Cryptography für k-anonyme Dining Cryptographer Netzwerke
Bachelor- oder Masterarbeit
Institute of Distributed Systems,
2018
in Vorbereitung
Zusammenfassung: Dining Cryptographer Netzwerke bieten eine Möglichkeit um in einer Gruppe anonym eine Nachricht an alle zu verbreiten. Diese Konstruktion benötigt jedoch sehr viele Nachtrichten und erzeugt daher viel Overhead. Um die Effizienz dieser Netzwerke zu verbessern, haben von Ahn. et al. das Konzept der k-Anonymität auf sie angewandt: Kleinere Gruppen im Gesamtnetzwerk erlauben eine Einschränkung der Anonymität, erzeugen jedoch deutlich weniger Overhead. Um die k-Anonymitätsgarantie zu stärken, bietet die Kryptografie das Konzept der Threshold-Kryptografie an: Nur wenn ausreichend Nutzer sich beteiligen, kann die Nachricht entschlüsselt werden. Ziel dieser Arbeit ist es, die Umsetzung dieser Technik für k-DC Netze zu untersuchen. |
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7.
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Entwicklung einer Softwarekomponente für einzigartige Signaturen mit Intel SGX
Abschlussarbeit, Projekt
Institute of Distributed Systems,
2018
in Vorbereitung
Zusammenfassung: Replizierte Systeme basieren oft auf Einigungsalgorithmen. Im Falle von beliebigen (byzantinischen Fehlern) werden N = 3f+1 Replikate benötigt bei f zu tolerierenden Fehlern. Mit Hilfe von vertrauenswürdigen Komponenten kann dies auf N = 2f+1 reduziert werden. Ein so genannter USIG ist so eine Komponente. Sie signiert eine Nachricht und zählt dabei eine von außen unveränderliche Sequenznummer hoch. Aufgabe der Arbeit ist es, ein Konzept und eine Implementierung mit Hilfe von Intel SGX zu entwickeln, die aus einer Java-Anwendung heraus genutzt werden kann. Herausforderungen ist neben der Implementierung die geeignete Initialisierung der Komponente. |
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6.
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Data-Centric Misbehavior Detection in Platooning
Bachelor Thesis
Institute of Distributed Systems,
2018
in Vorbereitung
Zusammenfassung: In recent years, much research has been devoted to the design and implementation of vehicle-to-vehicle communication, based on a variety of communication technologies. Current standards foresee an ad-hoc communication architecture, where vehicles interact with other vehicles without the need for infrastructure. A major concern in such a network is the integrity and correctness of the exchanged information. Although solid proposals exist to protect message integrity, the detection of incorrect messages (misbehaviour detection) is a domain where there is no agreed-upon solution. At the institute of distributed systems, we are developing the Maat framework, which is designed to collect messages and apply misbehaviour detection mechanisms to determine which messages are valid. We use techniques from information fusion and trust management to establish trustworthiness of messages and vehicles. For validation of our framework, we are looking for a student interested in designing novel attacks to test the reliability of our framework. In particular, we are interested in attacks designed to be difficult to detect, either by combining multiple attack strategies or designing new ones. These attack should be developed within the VEINS framework, a C++-based simulation library for vehicle-tovehicle communication. |
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5.
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Pause/Shift/Resume in Chronograph
Bachelor's thesis or individual lab project
Institute of Distributed Systems,
2017
in Vorbereitung
Zusammenfassung: Pause/Shift/Resume is a mechanism for doing iterative graph processing on an evolving graph using snapshots. Our Chronograph graph processing platform provides very similar functionalities based on an event-sourced graph model. In this work, the student is asked to incorporate the Pause/Shift/Resume mechanism into our platform. Therefore, the mechanism has to be adapted and adjusted to event-sourced graphs. Furthermore, an evaluation should highlight the runtime behavior of the approach in different workloads. |
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4.
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Evaluation of Key/Value Stores for Event Sourcing
Bachelor's thesis or individual lab project
Institute of Distributed Systems,
2017
in Vorbereitung
Zusammenfassung: Event sourcing is an alternative persistence approach that maintains a log of state-changing events instead of altering states directly. Event-sourced architectures require an event store for efficiently appending and retrieving log entries. In this project, an evaluation of different key/value stores and alternative (No)SQL stores is to be conducted in order to identify stores appropriate for event sourcing. |
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3.
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Design and Implementation of a REPL Interface for a Distributed Graph Processing Platform
Bachelor thesis or individual lab project
Institute of Distributed Systems,
2017
in Vorbereitung
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2.
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Secondary Index Structures on Event-sourced Graphs
Bachelor's thesis or individual lab project
Institute of Distributed Systems,
2017
in Vorbereitung
Zusammenfassung: As part of an ongoing research project at our institute, we are currently developing a novel distributed computing platform prototype. The systems provides a graph-based, asynchronous programming model and takes advantage of event sourcing for history-aware computations. The aim of this student work is the identification and evaluation of appropriate secondary index structures, in order to provide fast access onto specific notes of the graph topology. Also, a prototypical implementation is part of this work. |
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1.
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Data mining on distributed, asynchronous graph platforms
Bachelor's thesis
Institute of Distributed Systems,
2016
in Vorbereitung
Zusammenfassung: As part of an ongoing research project at our institute, we are currently developing a novel distributed computing platform prototype. The systems provides a graph-based, asynchronous programming model and takes advantage of event sourcing for history-aware computations. The aim of this student work is to compile a survey of data mining mechanisms that can be executed on graphs. Specifically, asynchronicity has to be considered here. As a result, our current prototype should be evaluated on how it suits existing graph mining approaches. |
Master-Arbeiten
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8.
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Blockchain Analysis with Chronograph
Bachelor's thesis, Master's thesis or individual lab project
Institute of Distributed Systems,
2018
in Vorbereitung
Zusammenfassung: Blockchain technology allows for decentralized, distributed, and secure ledgers that store records (e.g., transactions). Popular blockchain-based systems such as Bitcoin and Etherum have emerged as so-called crypto-currencies. As the ledger maintains the full history of transactions, interactions within the system are always persisted. In this work, the student is asked to design and implement online and offline transaction analyses based on Chronograph, a data processing platform for evolving graphs developed at our Institute. Therefore, different blockchain-based systems should be surveyed and appropriate analysis mechanisms should be conducted. |
|
7.
|
Dependency Tracking in Distributed Retroactive Applications
Bachelor's thesis, Master's thesis or individual lab project
Institute of Distributed Systems,
2018
in Vorbereitung
Zusammenfassung: Retroactive computing enables programmatical access to the history of an application. This offers a variety of capabilities, such as computations and predictions of alternate application timelines, post-hoc bug fixes, and retroactive state explorations. Reads and writes of the application state have to be tracked and persisted in order to support retroaction. This is fairly simple for a single-writer append-only log, but entails various issues in a distributed setting. This thesis/project should explore different approaches for a distributed dependency tracking, including a prototypical implementation based on an existing platform prototype and an evaluation of the resulting artifacts. |
|
6.
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Evaluation von Threshold Cryptography für k-anonyme Dining Cryptographer Netzwerke
Bachelor- oder Masterarbeit
Institute of Distributed Systems,
2018
in Vorbereitung
Zusammenfassung: Dining Cryptographer Netzwerke bieten eine Möglichkeit um in einer Gruppe anonym eine Nachricht an alle zu verbreiten. Diese Konstruktion benötigt jedoch sehr viele Nachtrichten und erzeugt daher viel Overhead. Um die Effizienz dieser Netzwerke zu verbessern, haben von Ahn. et al. das Konzept der k-Anonymität auf sie angewandt: Kleinere Gruppen im Gesamtnetzwerk erlauben eine Einschränkung der Anonymität, erzeugen jedoch deutlich weniger Overhead. Um die k-Anonymitätsgarantie zu stärken, bietet die Kryptografie das Konzept der Threshold-Kryptografie an: Nur wenn ausreichend Nutzer sich beteiligen, kann die Nachricht entschlüsselt werden. Ziel dieser Arbeit ist es, die Umsetzung dieser Technik für k-DC Netze zu untersuchen. |
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5.
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Controlled Neurofeedback using Mobile EEG and Smartphone
Master's thesis
Institute of Distributed Systems,
2018
in Vorbereitung
Zusammenfassung: Neurofeedback provides the necessary means to visualize selected and controlled parameters of the brain activity. In healthcare domain, neurofeedback studies enable mitigation of many psychological disorders and illnesses, mainly by therapies that help patients to better self-regulate their brain activity. Electroencephalography (EEG) is the method of monitoring the electrical activity of the brain, thus providing the necessary feedback. In this thesis work, the student is required to survey the current state of frameworks, techniques, or methods that enable coupling of Mobile EEGs with Smartphones. Bluetooth 2.1 with Enhanced Data Rate (EDR) capability is one of the most effective mean of coupling EEGs with Smartphones. The student would therefore be required to work on the Bluetooth stack to acquire real-time data generated from the Mobile EEGs, parse the electrical signal, and visualize the signal semantically. For successful completion of the thesis, the student would be required to identify and address any one of the open challenges faced by the proposed topic. An example of this can be addressing the bandwidth challenges, battery consumption, or signal accuracy |
4. 
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Privacy Increasing Group Creation for Networks
Master's thesis
Institute of Distributed Systems,
2018
in Vorbereitung
Zusammenfassung: Peer-to-peer networks sometimes use group based comm- unication protocols. These share messages within a group of participants, e.g., to enhance privacy or provide fault tolerance. But group-based network protocols are faced with the hard problem of creating suitable communication groups. This problem is especially hard if you want to optimize for privacy. For privacy-preserving protocols we want communication partners that do not collude. The goal of this thesis is to design a scheme to classify network participants by collusion probability and deduce a suitable group size for minimal collusion. The result of the thesis should be a proof of concept implementtation of the scheme, as well as a theoretical evaluation of the probabilities involved. |
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3.
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Blockchain Explorer
Projekt
Institute of Distributed Systems, Ulm University,
2017
in Vorbereitung
Zusammenfassung: In dem Projekt soll eine Webanwendung entstehen, die Daten aus einer Blockchain visualisiert und mit zusätzlichen Informationen aufbereitet. Für die bekannten Blockchains wie Bitcoin und Ethererum existieren Portale wie z.B. etherscan.io , die detaillierte Informationen über die jeweilige Blockchain anzeigen. Für den Einsatz in der Industrie sind diese öffentlichen Blockchains jedoch nicht zuverlässig genug. Deshalb betreut das SAMPL Projekt eine eigene Blockchain, die auf Ethereum aufbaut und speziell für Lizenzverwaltung ausgerichtet ist. Dafür soll nun ein Explorer entwickelt werden der den gleichen Komfort bietet wie die existierenden Plattformen. Die Rohdaten können per REST API bezogen werden, sollten dann aber für die Verwendung aufbereitet werden und in einer durchsuchbaren Datenbank abgelegt werden. Die UI sollte durch eine zeitgemäße Webseite geschehen. Testprojekte gibt es mit node.js und angular, jedoch ist verwendete Technologie egal, solange die Software zuverlässig im Produktivbetrieb eingesetzt werden kann. |
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2.
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Interactive exploration of event-sourced graphs
Master's thesis, Diploma thesis, or Project (8 or 16 ECTS)
Institute of Distributed Systems,
2016
in Vorbereitung
Zusammenfassung: The chronograph platform is a system for computing on evolving graphs. One module of the platform should provide an interactive user interface for exploring the history, evolution, and topology of the graph. The goal of this project is the design and implementation of a scalable, web-based user interface for the exploration of chronograph data. |
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1.
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Privacy Management using Differential Privacy in ITS
Master- oder Diplomarbeit
Institut für Verteilte Systeme, Universität Ulm,
April
2013
in Vorbereitung
Zusammenfassung: Joint project between University of Ulm, Germany and NICTA Sydney, Australia. Differential Privacy is a rather new concept that enables practically feasible privacy controls and formal guarantees to be implemented. In a recent publication, we have started to look how Differential Privacy can be used in the context of Intelligent Transportation Systems and Car-to-X communication and have identified a couple of open challenges. We have outlined how differential privacy can be integrated into the PRECIOSA Privacy-enforcing Runtime Architecture and identified a number of future research questions one being how to manage the appearing trade-off between data accuracy, privacy, and availability of data. The master thesis requires to work into the fields of Differential Privacy, Intelligent Transportation Systems, and the PRECIOSA project results based on available literature and material followed by conceptual work that should extend our existing proposal. A proof-of-concept implementation should then allow some practical analysis of the feasibility and achievable data accuracy based on Floating Car Data captured in real experiments. There is the option to work on the thesis during an internship at the NICTA in Sydney, Australia. Because of the need to apply for travel funding, this would require a longer-term planing before starting the work. |
Themen nach Schwerpunkt
Netzwerke
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1.
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Evaluation von Threshold Cryptography für k-anonyme Dining Cryptographer Netzwerke
Bachelor- oder Masterarbeit
Institute of Distributed Systems,
2018
in Vorbereitung
Zusammenfassung: Dining Cryptographer Netzwerke bieten eine Möglichkeit um in einer Gruppe anonym eine Nachricht an alle zu verbreiten. Diese Konstruktion benötigt jedoch sehr viele Nachtrichten und erzeugt daher viel Overhead. Um die Effizienz dieser Netzwerke zu verbessern, haben von Ahn. et al. das Konzept der k-Anonymität auf sie angewandt: Kleinere Gruppen im Gesamtnetzwerk erlauben eine Einschränkung der Anonymität, erzeugen jedoch deutlich weniger Overhead. Um die k-Anonymitätsgarantie zu stärken, bietet die Kryptografie das Konzept der Threshold-Kryptografie an: Nur wenn ausreichend Nutzer sich beteiligen, kann die Nachricht entschlüsselt werden. Ziel dieser Arbeit ist es, die Umsetzung dieser Technik für k-DC Netze zu untersuchen. |
Mobile Systeme
|
2.
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Controlled Neurofeedback using Mobile EEG and Smartphone
Master's thesis
Institute of Distributed Systems,
2018
in Vorbereitung
Zusammenfassung: Neurofeedback provides the necessary means to visualize selected and controlled parameters of the brain activity. In healthcare domain, neurofeedback studies enable mitigation of many psychological disorders and illnesses, mainly by therapies that help patients to better self-regulate their brain activity. Electroencephalography (EEG) is the method of monitoring the electrical activity of the brain, thus providing the necessary feedback. In this thesis work, the student is required to survey the current state of frameworks, techniques, or methods that enable coupling of Mobile EEGs with Smartphones. Bluetooth 2.1 with Enhanced Data Rate (EDR) capability is one of the most effective mean of coupling EEGs with Smartphones. The student would therefore be required to work on the Bluetooth stack to acquire real-time data generated from the Mobile EEGs, parse the electrical signal, and visualize the signal semantically. For successful completion of the thesis, the student would be required to identify and address any one of the open challenges faced by the proposed topic. An example of this can be addressing the bandwidth challenges, battery consumption, or signal accuracy |
|
1.
|
Privacy Management using Differential Privacy in ITS
Master- oder Diplomarbeit
Institut für Verteilte Systeme, Universität Ulm,
April
2013
in Vorbereitung
Zusammenfassung: Joint project between University of Ulm, Germany and NICTA Sydney, Australia. Differential Privacy is a rather new concept that enables practically feasible privacy controls and formal guarantees to be implemented. In a recent publication, we have started to look how Differential Privacy can be used in the context of Intelligent Transportation Systems and Car-to-X communication and have identified a couple of open challenges. We have outlined how differential privacy can be integrated into the PRECIOSA Privacy-enforcing Runtime Architecture and identified a number of future research questions one being how to manage the appearing trade-off between data accuracy, privacy, and availability of data. The master thesis requires to work into the fields of Differential Privacy, Intelligent Transportation Systems, and the PRECIOSA project results based on available literature and material followed by conceptual work that should extend our existing proposal. A proof-of-concept implementation should then allow some practical analysis of the feasibility and achievable data accuracy based on Floating Car Data captured in real experiments. There is the option to work on the thesis during an internship at the NICTA in Sydney, Australia. Because of the need to apply for travel funding, this would require a longer-term planing before starting the work. |
Distributed Computing
|
8.
|
Blockchain Analysis with Chronograph
Bachelor's thesis, Master's thesis or individual lab project
Institute of Distributed Systems,
2018
in Vorbereitung
Zusammenfassung: Blockchain technology allows for decentralized, distributed, and secure ledgers that store records (e.g., transactions). Popular blockchain-based systems such as Bitcoin and Etherum have emerged as so-called crypto-currencies. As the ledger maintains the full history of transactions, interactions within the system are always persisted. In this work, the student is asked to design and implement online and offline transaction analyses based on Chronograph, a data processing platform for evolving graphs developed at our Institute. Therefore, different blockchain-based systems should be surveyed and appropriate analysis mechanisms should be conducted. |
|
7.
|
Dependency Tracking in Distributed Retroactive Applications
Bachelor's thesis, Master's thesis or individual lab project
Institute of Distributed Systems,
2018
in Vorbereitung
Zusammenfassung: Retroactive computing enables programmatical access to the history of an application. This offers a variety of capabilities, such as computations and predictions of alternate application timelines, post-hoc bug fixes, and retroactive state explorations. Reads and writes of the application state have to be tracked and persisted in order to support retroaction. This is fairly simple for a single-writer append-only log, but entails various issues in a distributed setting. This thesis/project should explore different approaches for a distributed dependency tracking, including a prototypical implementation based on an existing platform prototype and an evaluation of the resulting artifacts. |
|
6.
|
Pause/Shift/Resume in Chronograph
Bachelor's thesis or individual lab project
Institute of Distributed Systems,
2017
in Vorbereitung
Zusammenfassung: Pause/Shift/Resume is a mechanism for doing iterative graph processing on an evolving graph using snapshots. Our Chronograph graph processing platform provides very similar functionalities based on an event-sourced graph model. In this work, the student is asked to incorporate the Pause/Shift/Resume mechanism into our platform. Therefore, the mechanism has to be adapted and adjusted to event-sourced graphs. Furthermore, an evaluation should highlight the runtime behavior of the approach in different workloads. |
|
5.
|
Evaluation of Key/Value Stores for Event Sourcing
Bachelor's thesis or individual lab project
Institute of Distributed Systems,
2017
in Vorbereitung
Zusammenfassung: Event sourcing is an alternative persistence approach that maintains a log of state-changing events instead of altering states directly. Event-sourced architectures require an event store for efficiently appending and retrieving log entries. In this project, an evaluation of different key/value stores and alternative (No)SQL stores is to be conducted in order to identify stores appropriate for event sourcing. |
|
4.
|
Design and Implementation of a REPL Interface for a Distributed Graph Processing Platform
Bachelor thesis or individual lab project
Institute of Distributed Systems,
2017
in Vorbereitung
|
|
3.
|
Secondary Index Structures on Event-sourced Graphs
Bachelor's thesis or individual lab project
Institute of Distributed Systems,
2017
in Vorbereitung
Zusammenfassung: As part of an ongoing research project at our institute, we are currently developing a novel distributed computing platform prototype. The systems provides a graph-based, asynchronous programming model and takes advantage of event sourcing for history-aware computations. The aim of this student work is the identification and evaluation of appropriate secondary index structures, in order to provide fast access onto specific notes of the graph topology. Also, a prototypical implementation is part of this work. |
|
2.
|
Interactive exploration of event-sourced graphs
Master's thesis, Diploma thesis, or Project (8 or 16 ECTS)
Institute of Distributed Systems,
2016
in Vorbereitung
Zusammenfassung: The chronograph platform is a system for computing on evolving graphs. One module of the platform should provide an interactive user interface for exploring the history, evolution, and topology of the graph. The goal of this project is the design and implementation of a scalable, web-based user interface for the exploration of chronograph data. |
|
1.
|
Data mining on distributed, asynchronous graph platforms
Bachelor's thesis
Institute of Distributed Systems,
2016
in Vorbereitung
Zusammenfassung: As part of an ongoing research project at our institute, we are currently developing a novel distributed computing platform prototype. The systems provides a graph-based, asynchronous programming model and takes advantage of event sourcing for history-aware computations. The aim of this student work is to compile a survey of data mining mechanisms that can be executed on graphs. Specifically, asynchronicity has to be considered here. As a result, our current prototype should be evaluated on how it suits existing graph mining approaches. |
Privacy
|
2.
|
Evaluation von Threshold Cryptography für k-anonyme Dining Cryptographer Netzwerke
Bachelor- oder Masterarbeit
Institute of Distributed Systems,
2018
in Vorbereitung
Zusammenfassung: Dining Cryptographer Netzwerke bieten eine Möglichkeit um in einer Gruppe anonym eine Nachricht an alle zu verbreiten. Diese Konstruktion benötigt jedoch sehr viele Nachtrichten und erzeugt daher viel Overhead. Um die Effizienz dieser Netzwerke zu verbessern, haben von Ahn. et al. das Konzept der k-Anonymität auf sie angewandt: Kleinere Gruppen im Gesamtnetzwerk erlauben eine Einschränkung der Anonymität, erzeugen jedoch deutlich weniger Overhead. Um die k-Anonymitätsgarantie zu stärken, bietet die Kryptografie das Konzept der Threshold-Kryptografie an: Nur wenn ausreichend Nutzer sich beteiligen, kann die Nachricht entschlüsselt werden. Ziel dieser Arbeit ist es, die Umsetzung dieser Technik für k-DC Netze zu untersuchen. |
|
1.
|
Privacy Management using Differential Privacy in ITS
Master- oder Diplomarbeit
Institut für Verteilte Systeme, Universität Ulm,
April
2013
in Vorbereitung
Zusammenfassung: Joint project between University of Ulm, Germany and NICTA Sydney, Australia. Differential Privacy is a rather new concept that enables practically feasible privacy controls and formal guarantees to be implemented. In a recent publication, we have started to look how Differential Privacy can be used in the context of Intelligent Transportation Systems and Car-to-X communication and have identified a couple of open challenges. We have outlined how differential privacy can be integrated into the PRECIOSA Privacy-enforcing Runtime Architecture and identified a number of future research questions one being how to manage the appearing trade-off between data accuracy, privacy, and availability of data. The master thesis requires to work into the fields of Differential Privacy, Intelligent Transportation Systems, and the PRECIOSA project results based on available literature and material followed by conceptual work that should extend our existing proposal. A proof-of-concept implementation should then allow some practical analysis of the feasibility and achievable data accuracy based on Floating Car Data captured in real experiments. There is the option to work on the thesis during an internship at the NICTA in Sydney, Australia. Because of the need to apply for travel funding, this would require a longer-term planing before starting the work. |
IT-Sicherheit
|
1.
|
Evaluation von Threshold Cryptography für k-anonyme Dining Cryptographer Netzwerke
Bachelor- oder Masterarbeit
Institute of Distributed Systems,
2018
in Vorbereitung
Zusammenfassung: Dining Cryptographer Netzwerke bieten eine Möglichkeit um in einer Gruppe anonym eine Nachricht an alle zu verbreiten. Diese Konstruktion benötigt jedoch sehr viele Nachtrichten und erzeugt daher viel Overhead. Um die Effizienz dieser Netzwerke zu verbessern, haben von Ahn. et al. das Konzept der k-Anonymität auf sie angewandt: Kleinere Gruppen im Gesamtnetzwerk erlauben eine Einschränkung der Anonymität, erzeugen jedoch deutlich weniger Overhead. Um die k-Anonymitätsgarantie zu stärken, bietet die Kryptografie das Konzept der Threshold-Kryptografie an: Nur wenn ausreichend Nutzer sich beteiligen, kann die Nachricht entschlüsselt werden. Ziel dieser Arbeit ist es, die Umsetzung dieser Technik für k-DC Netze zu untersuchen. |
Fehlertoleranz
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Cloud Computing
Es wurden keine Referenzen gefunden.
Multimediakommunikation
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Weitere Themen
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1.
|
Controlled Neurofeedback using Mobile EEG and Smartphone
Master's thesis
Institute of Distributed Systems,
2018
in Vorbereitung
Zusammenfassung: Neurofeedback provides the necessary means to visualize selected and controlled parameters of the brain activity. In healthcare domain, neurofeedback studies enable mitigation of many psychological disorders and illnesses, mainly by therapies that help patients to better self-regulate their brain activity. Electroencephalography (EEG) is the method of monitoring the electrical activity of the brain, thus providing the necessary feedback. In this thesis work, the student is required to survey the current state of frameworks, techniques, or methods that enable coupling of Mobile EEGs with Smartphones. Bluetooth 2.1 with Enhanced Data Rate (EDR) capability is one of the most effective mean of coupling EEGs with Smartphones. The student would therefore be required to work on the Bluetooth stack to acquire real-time data generated from the Mobile EEGs, parse the electrical signal, and visualize the signal semantically. For successful completion of the thesis, the student would be required to identify and address any one of the open challenges faced by the proposed topic. An example of this can be addressing the bandwidth challenges, battery consumption, or signal accuracy |