Publications

Articles

[J1]   Kalman Graffi and Andreas Disterhöft. SkyEye: A Tree-based Peer-to-Peer Monitoring Approach. Elsevier Computer Communications, Vol. 40, pages 593–610, 2017.

[J3]   Norbert Goebel, Tobias Krauthoff, Kalman Graffi and Martin Mauve. Moving Measurements: Measuring Network Characteristics of Mobile Cellular Networks on the Move. Elsevier Computer Communications, vol 97, pages 81–95, 2017.

[J4]   Barbara Guidi, Tobias Amft, Andrea De Salve, Kalman Graffi, and Laura Ricci. DiDuSoNet: A P2P Architecture for Distributed Dunbar-based Social Networks. Springer Peer-to-Peer Networking and Applications, vol 9(6), pages 1177–1194, 2016.

[J5]   Matthias Feldotto and Kalman Graffi. Systematic Evaluation of Peer-to-Peer Systems Using PeerfactSim.KOM. Wiley Concurrency and Computation: Practice and Experience, vol. 28(5), ISSN: 1532–0634, pages 1655–1677, 2016.

[J6]   Kalman Graffi. Decentralized Communication against Surveillance and Privacy Violation. it – Information Technology 2016, vol 58(2), pages 112–116, 2016.

[J7]   Parag S. Mogre, Kalman Graffi, Matthias Hollick, and Ralf Steinmetz. A Security Framework for Wireless Mesh Networks. Wiley Wireless Communications and Mobile Computing, vol. 11(3), pages 371–391, 2011.

[J8]   Kalman Graffi, Aleksandra Kovacevic, Patrick Mukherjee, Michael Benz, Christof Leng, Dirk Bradler, Julian Schröder-Bernhardi, and Nicolas Liebau. Peer-to-Peer-Forschung – Überblick und Herausforderungen. it – Information Technology (Methods and Applications of Informatics and Information Technology), 46(3), pages 272–279, 2007.

Patents

[Patent]   Parag S. Mogre, Kalman Graffi, Matthias Hollick, and Andreas Ziller. Method for Misbehaviour Detection in Secure Wireless Mesh Networks, Patent Numbers: CN101796861B, EP2034782A1, EP2198641A1, EP2198641B1, US20100180113, WO2009030693A1, 2010.

Reviewed conference and workshop papers

[1]   Andre Ippisch, Tobias Küper and Kalman Graffi. Time and Space in Android-based Opportunistic Networks. In IEEE AINA ’18: Proceedings of the Advanced Information Networking and Applications, pages 1–7, 2018

[2]   Andreas Disterhöft and Kalman Graffi. Minicamp: Middleware for Incomplete Participation in Structured Peer-to-Peer Monitoring Protocols. In IEEE AINA ’18: Proceedings of the Advanced Information Networking and Applications, pages 1–9, 2018

[3]   Andre Ippisch, Salem Sati and Kalman Graffi. Optimal Replication Based on Optimal Path Hops for Opportunistic Networks. In IEEE AINA ’18: Proceedings of the Advanced Information Networking and Applications, pages 1–8, 2018

[4]   Andreas Disterhöft and Kalman Graffi. Mr.Tree: Multiple Realities in Tree-based Monitoring Overlays for Peer-to-Peer Networks. In IEEE ICNC’18: Proceedings of the International Conference for Computing, Networking and Communications, pages 1–8, 2018

[5]   Raed Al-Aaridhi, Iakov Dlikman, Newton Masinde and Kalman Graffi. Search Algorithms for Distributed Data Structures in P2P Networks. In IEEE ISNCC’18: Proceedings of the International Symposium on Networks, Computers and Communications, pages 1–8, 2018

[6]   Andreas Disterhöft and Kalman Graffi. CapSearch: Capacity-Based Search in Highly Dynamic Peer-to-Peer Networks. In IEEE AINA ’17: Proceedings of the Advanced Information Networking and Applications, pages 1–10, 2017

[7]   Andre Ippisch and Kalman Graffi. Infrastructure Mode Based Opportunistic Networks on Android Devices. In IEEE AINA ’17: Proceedings of the Advanced Information Networking and Applications, pages 1–8, 2017

[8]   Tobias Amft and Kalman Graffi. Moving Peers in Distributed, Location-based Peer-to-Peer Overlays. In IEEE ICNC’17: Proceedings of the International Conference for Computing, Networking and Communications, pages 1–8, 2017

[9]   Salem Sati, Andre Ippisch and Kalman Graffi. Dynamic Replication Control Strategy for Opportunistic Networks. In IEEE ICNC’17: Proceedings of the International Conference for Computing, Networking and Communications, pages 1–8, 2017

[10]   Salem Sati, Andre Ippisch and Kalman Graffi. Replication Probability-based Routing Scheme for Opportunistic Networks. In NetSys’17: Proceedings of the GI/ITG International Conference on Networked Systems, pages 1–8, 2017

[11]   Andreas Disterhöft, Andreas Funke and Kalman Graffi. PacketSkip: Skip Graph for Multidimensional Search in Structured Peer-to-Peer System. In IEEE SASO ’17: Proceedings of the International Conference on Self-Adaptive and Self-Organizing Systems, pages 1–10, 2017.

[12]   Raed Al-Aaridhi, Ahmet Yueksektepe, Tobias Amft and Kalman Graffi. Access Control for Secure Distributed Data Structures in Distributed Hash Tables In IEEE LANMAN’17: Proceedings of the International Symposium on Local and Metropolitan Area Networks, pages 1–3, 2017.

[13]   Read Al-Aaridhi, Niklas Foerst and Kalman Graffi. Optimization of the Structure Cache for Distributed Data Structures in Overlay Networks In IEEE ICECTA’17: Proceedings of the International Conference on Electrical and Computing Technologies and Applications, pages 1–5, 2017

[14]   Raed Al-Aaridhi, Ahmet Yueksektepe, Tobias Amft and Kalman Graffi. Secure Model for Distributed Data Structures on Distributed Hash Tables In IEEE AEECT’17: Proceedings of the Jordan Conference on Applied Electrical Engineering and Computing Technologies, pages 1–10, 2017.

[15]   Andreas Disterhöft, Andreas Funke and Kalman Graffi. Minicamp: Middleware for Incomplete Participation in Structured Peer-to-Peer Monitoring Protocols. In IEEE LCN ’17: Proceedings of the International Conference on Local Computer Networks, pages 1–4, 2017.

[16]   Andre Ippisch, Salem Sati and Kalman Graffi. Device To Device Communication in Mobile Delay Tolerant Networks. In IEEE/ACM DS-RT ’17: Proceedings of the IEEE/ACM International Symposium on Distributed Simulation and Real Time Application, pages 1–8, 2017.

[17]   Jan Friesen, Raphael Bialon, Christoph Claßen and Kalman Graffi. Measuring Visibility using Smartphones. In EGU General Assembly 2017, Vol. 19, EGU2017-12869-2, pages 1–2, 2017.

[18]   Andreas Disterhöft and Kalman Graffi. Convex Hull Watchdog: Mitigation of Malicious Nodes in Tree-based P2P Monitoring Systems. In IEEE LCN ’16: Proceedings of the International Conference on Local Computer Networks, pages 1–8, 2016.

[19]   Raphael Bialon, Mateusz Lukaszewski and Kalman Graffi Misrouted Prophecy – On the Impact of Security Attacks on PRoPHET. In LSDVE ’16: Proceedings of the International Workshop on Large Scale Distributed Virtual Environments on Clouds and P2P, in conjunction with Euro-Par 2014, pages 1–12, 2016

[20]   Salem Sati, Christopher Probst and Kalman Graffi. Dynamic Dropping Policy to Improve PRoPHET’s Routing Performance. In IEEE MSN ’16: Proceedings of the International Conference on Mobile Ad-Hoc and Sensor Networks, pages 1–7, 2016.

[21]   Raed Al-Aaridhi, Ahmet Yueksektepe, Tobias Amft and Kalman Graffi. Distributed Data Structures Improvement for Collective Retrieval Time. In IEEE WPMC ’16: Proceedings of the International Symposium on Wireless Personal Multimedia Communications, pages 1–6, 2016. Best Paper Award.

[22]   Andrea De Salve, Laura Ricci, Paolo Mori, Raed Al-Aaridhi, and Kalman Graffi Privacy-preserving Data Allocation in Decentralized Online Social Networks. In DAIS ’16: Proceedings of the International Conference on Distributed Applications and Interoperable Systems, pages 1–14, 2016.

[23]   Norbert Goebel, Raphael Bialon, Martin Mauve and Kalman Graffi Coupled Simulation of Mobile Cellular Networks, Road Traffic and V2X applications using Traces. In IEEE ICC ’16: Proceedings of the International Conference on Communications, pages 1–7, 2016.

[24]   Ahmad Cheraghi, Tobias Amft, Salem Sati, Philipp Hagemeister and Kalman Graffi. The State of Simulation Tools for P2P Networks on Mobile Ad-Hoc and Opportunistic Networks. In IEEE ICCCN ’16: Proceedings of the International Conference on Computer Communications and Networks, pages 1–7, 2016.

[25]   Salem Sati, Christopher Probst and Kalman Graffi. Analysis of Buffer Management Policies for Opportunistic Networks. In IEEE ICCCN ’16: Proceedings of the International Conference on Computer Communications and Networks, pages 1–8, 2016.

[26]   Andreas Disterhöft and Kalman Graffi. Protected Chords in the Web: Secure P2P Framework for Decentralized Online Social Networks. In IEEE P2P ’15: Proceedings of the IEEE International Conference on Peer-to-Peer Computing, pages 1–5, 2015.

[27]   Tobias Amft, Barbara Guidi, Kalman Graffi, and Laura Ricci. FRoDO: Friendly Routing over Dunbar-based Overlays. In IEEE LCN ’15: Proceedings of the IEEE International Conference on Local Computing Networks, pages 1–9, 2015.

[28]   Christopher Probst, Andreas Disterhöft, and Kalman Graffi. Chunked-Swarm: Divide and Conquer for Real-time Bounds in Video Streaming. In IEEE NEW2AN ’15: Proceedings of the IEEE International Conference on Next Generation Wired/Wireless Networking, pages 1–12, 2015.

[29]   Salem Sati and Kalman Graffi. Adapting the Beacon Interval for Opportunistic Network Communications. In ICACCI ’15: Proceedings of the International Conference on Advances in Computing, Communications and Informatics, pages 1–7, 2015.

[30]   Raed Ali and Kalman Graffi. SandMash: An Approach for Mashups Techniques on Smartphones. In MobiWis ’15: Proceedings of the International Conference on Mobile Web and Intelligent Information Systems, pages 1–16, 2015.

[31]   Arman Sheikholeslami and Kalman Graffi. A Systematic Quality Analysis of Virtual Desktop Infrastructure Technologies. In LSDVE ’15: Proceedings of the International Workshop on Large Scale Distributed Virtual Environments on Clouds and P2P, in conjunction with Euro-Par 2015, pages 1–12, 2015.

[32]   Andre Ippisch and Kalman Graffi. An Android Framework for Opportunistic Wireless Mesh Networking. In NetSys’15: Proceedings of the Conference on Networked Systems, pages 1–2, 2015.

[33]   Andreas Disterhöft and Kalman Graffi. A Browser-based Secure P2P Framework for Decentralized Online Social Networks. In NetSys’15: Proceedings of the Conference on Networked Systems, pages 1–2, 2015.

[34]   Norbert Goebel, Markus Koegel, Martin Mauve, and Kalman Graffi. Trace-based Simulation of C2X-Communication using Cellular Networks. In IEEE/IFIP WONS’14: Proceedings of the IEEE/IFIP Annual Conference on Wireless On-demand Networks Systems and Services, pages 1–8, 2014.

[35]   Josef Jiru, Lars Bremer, and Kalman Graffi. Data Aggregation in VANETs – A Generalized Framework for Channel Load Adaptive Schemes. In IEEE LCN ’14: Proceedings of the IEEE International Conference on Local Computing Networks, pages 1–4, 2014.

[36]   Felix Eichert, Markus Monhof, and Kalman Graffi. The Impact of Routing Attacks on Pastry-based P2P Online Social Networks. In LSDVE ’14: Proceedings of the International Workshop on Large Scale Distributed Virtual Environments on Clouds and P2P, in conjunction with Euro-Par 2014, pages 1–12, 2014.

[37]   Matthias Feldotto, Christian Scheideler, and Kalman Graffi. HSkip+: A Self-Stabilizing Overlay Network for Nodes with Heterogeneous Bandwidths. In IEEE P2P ’14: Proceedings of the International Conference on Peer-to-Peer Computing, pages 1–10, 2014.

[38]   Jens Janiuk, Alexander Mäcker, and Kalman Graffi. Secure Distributed Data Structures for Peer-to-Peer-based Social Networks. In IEEE CTS ’14: Proceedings of the IEEE International Conference on Collaboration Technologies and Systems, pages 1–10, 2014.

[39]   Timo Klerx and Kalman Graffi. Bootstrapping Skynet: Calibration and Autonomic Self-Control of Structured Peer-to-Peer Networks. In IEEE P2P ’13: Proceedings of the International Conference on Peer-to-Peer Computing, pages 1–5, 2013.

[40]   Vitaliy Rapp and Kalman Graffi. Continuous Gossip-based Aggregation through Dynamic Information Aging. In IEEE ICCCN ’13: Proceedings of the International Conference on Computer Communications and Networks, pages 1–7, 2013.

[41]   Matthias Feldotto and Kalman Graffi. Comparative Evaluation of Peer-to-Peer Systems Using PeerfactSim.KOM. In IEEE HPCS’13: Proceedings of the International Conference on High Performance Computing and Simulation, pages 1–8, 2013. PICT PICT

[42]   Lars Bremer and Kalman Graffi. Symbiotic Coupling of P2P and Cloud Systems: The Wikipedia Case. In IEEE ICC ’13: Proceedings of the International Conference on Communications, pages 1–6, 2013.

[43]   Philip Wette and Kalman Graffi. Adding Capacity-Aware Storage Indirection to Homogeneous Distributed Hash Tables. In NetSys ’13: Proceedings of the Conference on Networked Systems, pages 1–8, 2013.

[44]   Markus Benter, Mohammad Divband, Sebastian Kniesburges, Andreas Koutsopoulos, and Kalman Graffi. Ca-Re-Chord: A Churn Resistant Self-stabilizing Chord Overlay Network. In NetSys ’13: Proceedings of the International Conference on Networked Systems, pages 1–8, 2013.

[45]   York Yannikos, Jonathan Schlüßler, Martin Steinebach, Christian Winter, and Kalman Graffi. Hash-based File Content Identification Using Distributed Systems. In IFIP ICDF ’13: Proceedings of the IFIP International Conference on Digital Forensics, pages 1–19, 2013.

[46]   Kalman Graffi. PeerfactSim.KOM: A P2P System Simulator – Experiences and Lessons Learned. In IEEE P2P ’11: Proceedings of the International Conference on Peer-to-Peer Computing, pages 1–2, 2011.

[47]   Kalman Graffi, Christian Groß, Dominik Stingl, Daniel Hartung, Aleksandra Kovacevic, and Ralf Steinmetz. LifeSocial.KOM: A Secure and P2P-based Solution for Online Social Networks. In IEEE CCNC ’11: Proceedings of the IEEE Consumer Communications and Networking Conferences, pages 1–5, 2011.

[48]   Daniel Hartung, Knut Wold, Kalman Graffi, and Slobodan Petrovic. Towards a Biometric Random Number Generator – A General Approach For True Random Extraction From Biometric Samples. In BIOSIG ’11: Proceedings of the International Conference of the Special Interest Group on Biometrics Bookmark and Share, pages 1–8, 2011.

[49]   Patrick Mukherjee, Karsten Saller, Aleksandra Kovacevic, Kalman Graffi, Andy Schüerr, and Ralf Steinmetz. Tracability Link Evolution with Version Control. In ESoSyM ’11: Proceedings of Evolutionäre Software- und Systementwicklung – Methoden und Erfahrungen , Workshop collocated with Internation Conference on Software Engineering 2011, pages 1–11, 2011.

[50]   Kalman Graffi, Christian Groß, Dominik Stingl, Hoang Nguyen, Aleksandra Kovacevic, and Ralf Steinmetz. Towards a P2P Cloud: Reliable Resource Reservations in Unreliable P2P Systems. In IEEE ICPADS ’10: Proceedings of the International Conference on Parallel and Distributed Systems, pages 1–10, 2010.

[51]   Kalman Graffi, Christian Groß, Patrick Mukherjee, Aleksandra Kovacevic, and Ralf Steinmetz. LifeSocial.KOM: A P2P-based Platform for Secure Online Social Networks. In IEEE P2P ’10: Proceedings of the International Conference on Peer-to-Peer Computing, pages 1–2, 2010.

[52]   Kalman Graffi, Dominik Stingl, Julius Rückert, and Aleksandra Kovacevic. Monitoring and Management of Structured Peer-to-Peer Systems. In IEEE P2P ’09: Proceedings of the International Conference on Peer-to-Peer Computing, pages 1–10, 2009.

[53]   Kalman Graffi, Patrick Mukherjee, Burkhard Menges, Daniel Hartung, Aleksandra Kovacevic, and Ralf Steinmetz. Practical Security in P2P-based Social Networks. In IEEE LCN ’09: Proceedings of the International Conference on Local Computer Networks, pages 1–4, 2009.

[54]   Osama Abboud, Aleksandra Kovacevic, Kalman Graffi, Konstantin Pussep, and Ralf Steinmetz. Underlay Awareness in P2P Systems: Techniques and Challenges. In IEEE IPDPS ’09: Proceedings of the International Symposium on Parallel and Distributed Processing, pages 1–8, 2009.

[55]   Kalman Graffi, Aleksandra Kovacevic, Song Xiao, and Ralf Steinmetz. SkyEye.KOM: An Information Management Over-Overlay for Getting the Oracle View on Structured P2P Systems. In IEEE ICPADS ’08: Proceedings of the International Conference on Parallel and Distributed Systems, pages 1–8, 2008.

[56]   Kalman Graffi, Sergey Podrajanski, Patrick Mukherjee, Aleksandra Kovacevic, and Ralf Steinmetz. A Distributed Platform for Multimedia Communities. In IEEE ISM ’08: Proceedings of the International Symposium on Multimedia, pages 1–6, 2008.

[57]   Kalman Graffi, Sebastian Kaune, Konstantin Pussep, Aleksandra Kovacevic, and Ralf Steinmetz. Load Balancing for Multimedia Streaming in Heterogeneous Peer-to-Peer Systems. In ACM NOSSDAV ’08: Proceedings of the International Workshop on Network and Operating Systems Support for Digital Audio and Video, pages 1–6, 2008.

[58]   Kalman Graffi, Aleksandra Kovacevic, Nicolas Liebau, and Ralf Steinmetz. From Cells to Organisms: Long-Term Guarantees on Service Provisioning in Peer-to-Peer Networks. In ACM PICT PICT SIGAPP NOTERE ’08: Proceedings of the International Conference on New Technologies of Distributed Systems, pages 1–6, 2008.

[59]   Aleksandra Kovacevic, Kalman Graffi, Sebastian Kaune, Christof Leng, and Ralf Steinmetz. Towards Benchmarking of Structured Peer-to-Peer Overlays for Network Virtual Environments. In IEEE ICPADS ’08: Proceedings of the International Conference on Parallel and Distributed Systems, pages 1–6, 2008.

[60]   Kalman Graffi, Parag Mogre, Matthias Hollick, and Ralf Steinmetz. Detection of Colluding Misbehaving Nodes in Mobile Ad Hoc and Mesh Networks. In IEEE GLOBECOM 07: Proceedings of the Global Communications Conference, Exhibition & Industry Forum, pages 1–5, 2007.

[61]   Kalman Graffi, Konstantin Pussep, Sebastian Kaune, Aleksandra Kovacevic, Nicolas Liebau, and Ralf Steinmetz. Overlay Bandwidth Management: Scheduling and Active Queue Management of Overlay Flows. In IEEE LCN ’07: Proceedings of the International Conference on Local Computer Networks, pages 1–9, 2007.

[62]   Kalman Graffi, Aleksandra Kovacevic, Kyra Wulffert, and Ralf Steinmetz. ECHoP2P: Emergency Call Handling over Peer-to-Peer Overlays. In IEEE P2PNVE’07: Proceedings of the International Workshop on Peer-to-Peer Network Virtual Environments, pages 1–10, 2007.

[63]   Nicolas Liebau, Konstantin Pussep, Kalman Graffi, Sebastian Kaune, Eric Jahn, André Beyer, and Ralf Steinmetz. The Impact Of The P2P Paradigm on the New Media Industries. In AMCIS ’07: Proceedings of Americas Conference on Information Systems, pages 1–17, 2007.

[64]   Parag Mogre, Kalman Graffi, Matthias Hollick, and Ralf Steinmetz. AntSec, WatchAnt and AntRep:Innovative Security Mechanisms for Wireless Mesh Networks. In IEEE LCN ’07: Proceedings of the International Conference on Local Computer Networks, pages 1–9 2007.

Book chapters

[B1]   Tobias Amft and Kalman Graffi. Webs of Change? The Transformation of Online Social Networks and Communication Infrastructures from a Technological Point of View In Florian Kohstall, Carola Richter, Sarhan Dhouib and Fatima Kastner, editors, Academia in Transformation – Scholars Facing the Arab Uprisings, pages 1–12. Nomos Verlag, 2016.

[B2]   Christian Scheideler and Kalman Graffi. Programming for distributed computing: From physical to logical networks. In Edward K. Blum and Alfred V. Aho, editors, Computer Science, pages 155–168. Springer New York, 2011.

Technical reports

[TR1]   Tobias Amft and Kalman Graffi The Benefit of Stacking Multiple Peer-to-Peer Overlays Technical Report TR-2017-002. Technology of Social Networks Group, Heinrich Heine University, Düsseldorf, Germany. 2017

[TR2]   Tobias Amft and Kalman Graffi A Tale of many Networks: Splitting and Merging of Chord-like Overlays in Partitioned Networks Technical Report TR-2017-001. Technology of Social Networks Group, Heinrich Heine University, Düsseldorf, Germany. 2017

[TR3]   Kalman Graffi, Konstantin Pussep, Nicolas Liebau, and Ralf Steinmetz. Taxonomy of Active Queue Management Strategies in Context of Peer-to-Peer Scenarios. Technical Report TR-2007-01, Technische Universität Darmstadt, Germany, 2007.

[TR4]   Kalman Graffi, Nicolas Liebau, and Ralf Steinmetz. Taxonomy of Message Scheduling Strategies in Context of Peer-to-Peer Scenarios. Technical Report TR-2007-02, Multimedia Communications Lab KOM, Technische Universität Darmstadt, Germany, 2007.

[TR5]   Aleksandra Kovacevic, Sebastian Kaune, Hans Heckel, Andre Mink, Kalman Graffi, Oliver Heckmann, and Ralf Steinmetz. PeerfactSim.KOM – A Simulator for Large-Scale Peer-to-Peer Networks. Technical Report TR-2006-06, TU Darmstadt, 2006.

Theses

[Diss]   Kalman Graffi. Monitoring and Management of Peer-to-Peer Systems. PhD thesis, 2010.

[Dipl]   Kalman Graffi. A Security Framework for Organic Mesh Networks. Master’s thesis, Technische Universität Darmstadt, Germany, 2006.