Verteilte Systeme - Overview

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- Overview Prof. Dr.-Ing. Torben Weis Building BC, 4 th Floor, Room 407 http://www.vs.uni-due.

1 - Overview Prof. Dr.-Ing. Torben Weis Building BC, 4 th Floor, Room Scientific Staff Christopher Boelmann Sebastian Schuster Matthäus Wander Working Areas Networked systems (everything up the network layer) Cloud computing, web & mobile applications Decentralized networks (peer-to-peer systems) DAI Application Areas: C, E, F 1

de Scientific Staff Christopher Boelmann Sebastian Schuster Matthäus Wander Working Areas

2 - Overview Prof. Dr.-Ing. Torben Weis Building BC, 4 th Floor, Room Scientific Staff Christopher Boelmann Sebastian Schuster Matthäus Wander Working Areas Networked systems (everything up the network layer) Cloud computing, web & mobile applications Decentralized networks (peer-to-peer systems) DAI Application Areas: C, E, F 2

3 - Overview Prof. Dr.-Ing. Torben Weis Building BC, 4 th Floor, Room Scientific Staff Christopher Boelmann Sebastian Schuster Matthäus Wander Working Areas Networked systems (everything up the network layer) Cloud computing, web & mobile applications Decentralized networks (peer-to-peer systems) DAI Application Areas: C, E, F 3

4 - Overview Prof. Dr.-Ing. Torben Weis Building BC, 4 th Floor, Room Scientific Staff Christopher Boelmann Sebastian Schuster Matthäus Wander Working Areas Networked systems (everything up the network layer) Cloud computing, web & mobile applications Decentralized networks (peer-to-peer systems) DAI Application Areas: C, E, F 4

5 Diploma Thesis: Self-Stabilizing P2P Network Implementing and Evaluating a Self-Stabilizing Delaunay (Peer-to-Peer) Network Used for a 2-dimensional distributed data store Using Voronoi partitioning to decide on data locations Various design choices E.g. buffering/delaying of messages vs. negative replies Influencing stabilization speed, number of messages, Contact: Sebastian.Schuster@uni-due.de 5

partitioning to decide on data locations Various design choices E.g. buffering/delaying of messages vs.

6 Diploma Theses: Distributed Data Store Web Service Distributed Data Store for Android Smartphones Content-Addressable Multi-Layer Indexed Storage Contact: 6

7 Diploma Theses: Distributed Data Store Operational Transformation (OT): Lock-free data synchronization Data Web Store Service write ops write ops Operate offline on cache Distributed Data Store for Android Smartphones Content-Addressable Multi-Layer Indexed Storage Contact: 7

Operate offline on cache Distributed Data Store for Android Smartphones

8 Diploma Theses: Distributed Data Store resource-intensive computation Operational Transformation (OT): Lock-free data synchronization Data Store Application Server write ops write ops Operate offline on cache Distributed Data Store for Android Smartphones Content-Addressable Multi-Layer Indexed Storage Contact: 8

write ops write ops Operate offline on cache Distributed Data Store for Android

9 Diploma Thesis: GPU Hash Computing positive response test IN A negative response NXDOMAIN GPU-assisted Crawling of DNSSEC-signed Zones Crawl public DNS to gather hash values Use GPU computing to recover domain names ATI: OpenCL NVIDIA: CUDA Build DNS database for monitoring and analysis Contact: Matthaeus.Wander@uni-due.de 9

public DNS to gather hash values Use GPU computing to recover domain names ATI:

Diploma Thesis: GPU Hash Computing positive response test IN A 1.2.3.

10 Diploma Thesis: GPU Hash Computing positive response test IN A negative response mail NXDOMAIN NSEC www GPU-assisted Crawling of DNSSEC-signed Zones Crawl public DNS to gather hash values Use GPU computing to recover domain names ATI: OpenCL NVIDIA: CUDA Build DNS database for monitoring and analysis Contact: Matthaeus.Wander@uni-due.de 10

Crawl public DNS to gather hash values Use GPU computing to recover domain names ATI:

11 Diploma Thesis: GPU Hash Computing positive response test IN A negative response mail 1GMCV3RH3QQN NXDOMAIN NSEC www IN NSEC3 38AIFJ37915I GPU-assisted Crawling of DNSSEC-signed Zones Crawl public DNS to gather hash values Use GPU computing to recover domain names ATI: OpenCL NVIDIA: CUDA Build DNS database for monitoring and analysis Contact: Matthaeus.Wander@uni-due.de 11

Crawling of DNSSEC-signed Zones Crawl public DNS to gather hash values Use GPU computing to

12 Diploma Thesis: Excel Spreadsheet Generator Title: User Interface for Excel-based Programming of Sensor Networks (E/F) Implementing an Excel Add-In (C#) Aim: Easy generation of sensor network simulating spreadsheets for scientists Spreadsheets shall be utilizable for sensor node code-generation Further challenges UI shall support different types of predefined sensor node applications Definition of new Excel functions may be necessary Contact: 12

Spreadsheets shall be utilizable for sensor node code-generation Further challenges UI shall support different types of

NSEC3 Hash Breaking. GPU-based. Matthäus Wander, Lorenz Schwittmann, Christopher Boelmann, Torben Weis IEEE NCA 2014. <matthaeus.wander@uni-due.

NSEC3 Hash Breaking. GPU-based. Matthäus Wander, Lorenz Schwittmann, Christopher Boelmann, Torben Weis IEEE NCA 2014. <matthaeus.wander@uni-due. GPU-based NSEC3 Hash Breaking Matthäus Wander, Lorenz Schwittmann, Christopher Boelmann, Torben Weis IEEE NCA 2014 Cambridge, August 22, 2014 NSEC3 FUNDAMENTALS Matthäus Wander