CV

I’m a Professor at the University of Kassel where I head the Distributed Systems group. Before, I was professor at Brandenburg University of Technoligy and headded the Computer Networks group. Prior to that, I was at RWTH Aachen University, and before I was with Anja Feldmann at TU Berlin / Deutsche Telekom Innovation Laboratories. I was a visiting scholar at the group of Paul Barford at the University of Wisconsin - Madison, USA.

I studied computer science at Darmstadt University of Applied Sciences, Institute Eurecom (Sophia Antipolis, France) and Darmstadt University of Technology and hold a Bachelor of Science (B.Sc.) and Master of Science (M.Sc.) degree. From 2004 to 2006 I was with the Fraunhofer IGD where I worked on network architectures for telemedical applications. I obtained a Ph.D. (Dr. rer. nat.) from TU Berlin in 2013 (Advisor: Anja Feldmann).

I am a Senior Member of the ACM.

Interests

Network Security
Network Measurements
Internet architecture / protocols
Quality of Experience / Psychological Studies

Education

Dr. rer. nat. (Ph.D.) in Computer Science, 2013
TU Berlin (Advisor: Anja Feldmann)
M.Sc. in Computer Science, 2008
TU Darmstadt

I use a data-driven approach including user studies, empirical network measurement, and machine learning
to understand and improve Internet performance and security.

Current Service

**Current Service**: TPC of NSDI'25, SIGCOMM'24, SIGMETRICS'24, CoNEXT'24, IMC'24, NSDI'24, ACM CoNEXT'24, ACM SIGMETRICS'24, ACM IMC'23, ACM SIGCOMM'22, ACM IMC'22, ACM CoNEXT'22, ACM SIGMETRICS'22+23

Open Positions

Do you speak BGP, know Internet Measurements, and are on the lookout for an exciting PhD position? If so, please get in touch with me. I am looking for someone with a passion for network engineering to join my team at University of Kassel. You must have a master's degree or be close to graduation, and possess a strong understanding of BGP and Internet measurements.

News

2024-05	paper	Paper at SIGCOMM'24: Ingres Point Detection
2024-02	paper	Paper at ICWSM'24: Reviewing War: Unconventional User Reviews as a Side Channel to Circumvent Information Controls
2024-01	paper	TPC of SIGCOMM'24, IMC'24, CoNEXT'24, NSDI'25
2023-03	service	TPC of NSDI 2024 and IMC 2023
2022-10	misc	I started a new position at the University of Kassel.
2022-05	paper	Paper accepted to appear at ACM SIGCOMM'22: IXP Scrubber: Learning from Blackholing Traffic for ML-Driven DDoS Detection at Scale
2022-04	paper	New CCR paper: Recommendations for Designing Hybrid Conferences
2022-03	paper	Viet presented our TOIT Web Consolidation paper at the IETF 113 Internet Architecture Board (IAB) Open Meeting (video)
2022-01	service	TPC of ACM IMC and TMA 2022
2022-01	paper	Our work on collaborative detection and mitigation of DDoS attacks is awarded the 2022 IETF/IRTF Applied Networking Research Prize!!
2021-12	paper	Two paper acceted at PAM 2022: 1) Lights on Power Plant Control Networks 2) Geographic Differences in Social Media Interactions Exist Between Western and Middle-East Countries
2021-11	service	TPC of ACM SIGCOMM 2022
2021-10	paper	Part of Leo’s bachelor thesis will appear at the CoNEXT'21 Student Workshop
2021-09	service	Cristel and me will be TPC Chair of PAM'22. I am also joining the Steering Committee of TMA.
2021-09	paper	Our paper on DDoS detection at scale will appear at CCS'21. Our work on analyzing the Cyberbunker bulletproof hoster will appear as CCS'21 poster.

Awards

2022 - 2022 IETF/IRTF Applied Networking Research Prize
2021 - Best of CCR: TLS 1.3 deployment measurement paper
2020 - ACM Senior Member
2019 - IEEE QoMEX 2019 Best Reviewer Award
2018 - ACM Internet Measurement Conference (IMC) Community Contribution Award
2017 - IEEE QoMEX 2017 Reviewer Recognition Award
2010 - MMB Master’s Thesis Award (Award Announcement Conference Report)
By GI/ITG Measurement, Modelling and Evaluation of Computing Systems group
March 2009 - KuVS Master’s Thesis Award (Award Homepage)
by GI/ITG Communication in Distributed Systems (KuVS) Group

Projects

	Principal Investigator:AIDOS: Artifical Intelligence-based DDoS Mitigation at Internet Exchange Points 2019 - 2022 Joint project with the DE-CIX Internet Exchange Point Funded by the BMBF
	Principal Investigator: DFG Collaborative Research Center SFB 1053 MAKI MAKI – Multi-Mechanisms Adaptation for the Future Internet 2017-2020 (Entry in GPRIS project database) The project provides funding for 1 PhD position
	Principal Investigator:COMTEX: Context in Anonymous Short Texts 2018 - 2019 Joint project with linguistics and sociology on social network analysis. Funded by the Excellence Initiative of the German federal and state governments
	Principal Investigator: Internet Observatory 2018 - 2019 Funded by the Excellence Initiative of the German federal and state governments
	Principal Investigator and member of the general assembly: SSICLOPS Scalable and Secure Infrastructures for Cloud Operations (funded by the EU under Horizon 2020, 2015-2018) The project provides funding for 2 PhD positions

Professional Services

Conference Organization

2022: PAM'22 TPC Co-Chair
2021: PAM'21 General Chair, TMA'21 General Chair
…

Habilitation/HDR Committees

HDR Committee of Maciej Korczynski, Grenoble Alpes University, France, 2021. Thesis title: “Traffic Measurements and Data Analysis for DNS Security”

PhD Committees

2023-10-12	Flexible QUIC loss recovery mechanisms for latency-sensitive applications François Michel UCLouvain, Belgium
2023-10-06	Towards Data-Driven Algorithm Design in Networking Patrick Krämer TU Munich, Germany
2022-04-25	Modeling and Design of Novel QoE Management Strategies for Adaptive Video Streaming Susanna Schwarzmann TU Berlin, Germany
2022-03-01	From the Edge to the Core: Towards Informed Vantage Point Selection for Internet Measurement Studies Franziska Lichtblau Max Planck Institut for Informatics / Universität des Saarlandes, Germany
2022-01-11	An AI and data-driven approach to unwanted network traffic inspection Francesca Soro Politecnico di Torino, Italy
2021-09-24	Making DNSSEC Future Proof Moritz Müller University of Twente, Netherlands
2021-07-12	Analysis of Influencing Factors in Speech Quality Assessment using Crowdsourcing Rafael Zequeira Jiménez TU Berlin, Germany
2021-07-02	Web Quality of Experience Measurement: Metrics, Methods and Tools Alemnew Asrese Aalto University, Finland
2020-12-15	Debugging Modern Web Protocols video Robin Marx Hasselt University, Belgium
2019-12-18	Improving Anycast with Measurements Wouter de Vries University of Twente, Netherlands
2019-06-13	Dissecting HTTP/2 and QUIC: Measurement Jawad Manzoor UC Louvain, Belgium
2019-01-18	Revisiting the Interplay of Inter-Domain Traffic and Routing Policies Thomas Krenc TU Berlin, Germany

2024: NSDI USENIX NSDI
2024: SIGMETRICS SIGMETRICS
2024: CoNEXT ACM International Conference on emerging Networking EXperiments and Technologies
2024: PAM Passive and Active Measurement Conference
2023: CoNEXT Student Workshop PhD student workshop
2023: SIGMETRICS SIGMETRICS
2023: IMC ACM Internet Measurement Conference
2022: IMC ACM Internet Measurement Conference
2022: SIGCOMM ACM SIGCOMM
2022: SIGMETRICS SIGMETRICS
2022: TMA Network Traffic Measurement and Analysis Conference
2021: CoNEXT ACM International Conference on emerging Networking EXperiments and Technologies
2021: CoNEXT Student Workshop PhD student workshop
2021: TMA Network Traffic Measurement and Analysis Conference
2021: ANRW ACM/IRTF Applied Networking Research Workshop
2021: EPIQ Workshop on Evolution, Performance, and Interoperability of QUIC (EPIQ)
2021: QoMEX IEEE International Conference on Quality of Multimedia Experience
2021: GI IEEE Global Internet Symposium
2021: MALENE Machine Learning in Networking
2021: NFV-SDN IEEE NFV-SDN
2021: NoF IEEE International Conference on Networks of the Future (NoF)
2021: NoF IEEE International Conference on Networks of the Future (NoF)
2021: Networking IFIP Networking
2021: NetSoft IEEE Conference on Network Softwarization
2020: ITSec ITG Workshop on IT Security (ITSec)
2020: CoNEXT Student Workshop PhD student workshop
2020: SIGCOMM Posters/Demos ACM SIGCOMM Posters, Demos, and Student Research Competition
2020: EPIQ Workshop on Evolution, Performance, and Interoperability of QUIC (EPIQ)
2020: TMA Network Traffic Measurement and Analysis Conference
2020: PAM Passive and Active Measurement Conference
2020: NetSoft IEEE Conference on Network Softwarization
2020: NFV-SDN IEEE NFV-SDN
2020: QoMEX IEEE International Conference on Quality of Multimedia Experience
2020: NOMS IEEE/IFIP Network Operations and Management Symposium
2020: NoF IEEE International Conference on Networks of the Future (NoF)
2020: CoNEXT ACM International Conference on emerging Networking EXperiments and Technologies
2019: IMC ACM Internet Measurement Conference
2019: CoNEXT ACM International Conference on emerging Networking EXperiments and Technologies
2019: PAM Passive and Active Measurement Conference
2019: ICCCN IEEE International Conference on Computer Communications and Networks
2019: NetSoft IEEE Conference on Network Softwarization
2019: EPIQ Workshop on Evolution, Performance, and Interoperability of QUIC (EPIQ)
2019: QoMEX IEEE International Conference on Quality of Multimedia Experience
2019: Internet-QoE Internet QoE Workshop
2019: QoE-Management International Workshop on Quality of Experience Management
2019: NetSys International Conference on Networked Systems
2019: NFV-SDN IEEE NFV-SDN
2019: SIGCOMM Posters/Demos ACM SIGCOMM Posters, Demos, and Student Research Competition
2018: CoNEXT ACM International Conference on emerging Networking EXperiments and Technologies
2018: EPIQ Workshop on Evolution, Performance, and Interoperability of QUIC (EPIQ)
2018: CoNEXT Student Workshop PhD student workshop
2018: PAM Passive and Active Measurement Conference
2018: NetSoft IEEE Conference on Network Softwarization
2018: NFV-SDN IEEE NFV-SDN
2018: GI IEEE Global Internet Symposium
2018: CloudCom IEEE International Conference on Cloud Computing Technology and Science
2018: QoMEX IEEE International Conference on Quality of Multimedia Experience
2018: QoE-Management International Workshop on Quality of Experience Management
2018: Internet-QoE Internet QoE Workshop
2018: MobiArch Workshop on Mobility in the Evolving Internet Architecture
2018: SecSoN ACM SIGCOMM 2018 Workshop on Security in Softwarized Networks
2018: MIPR IEEE Conference on Multimedia Information Processing and Retrieval
2017: NetSoft IEEE Conference on Network Softwarization
2017: ITC International Teletraffic Congress
2017: Internet-QoE Internet QoE Workshop
2017: QoMEX IEEE International Conference on Quality of Multimedia Experience
2017: NFV-SDN IEEE NFV-SDN
2017: CNSM NFV-SDN
2017: CloudCom IEEE International Conference on Cloud Computing Technology and Science
2017: DCC Workshop on Distributed Cloud Computing
2017: CAN Cloud-Assisted Networking Workshop
2017: NetSys International Conference on Networked Systems
2016: NetSoft IEEE Conference on Network Softwarization
2016: CloudCom IEEE International Conference on Cloud Computing Technology and Science
2016: CAN Cloud-Assisted Networking Workshop
2016: NFV-SDN IEEE NFV-SDN
2016: ITC International Teletraffic Congress
2016: Man SDN/NFV International Workshop on Management of SDN and NFV Systems
2016: PQS International Workshop on Perceptual Quality of Systems
2016: ICCE IEEE International Conference on Consumer Electronics
2016: MONAMI International Conference on Mobile Networks and Management
2015: SCRUM Strategies for Consistency, Replication, and Understandability in Middleware
2015: Man SDN/NFV International Workshop on Management of SDN and NFV Systems
2015: MONAMI International Conference on Mobile Networks and Management
2015: DCC Workshop on Distributed Cloud Computing
2015: QCMan IFIP/IEEE Workshop on QoE Centric Management
2015: CloudCom IEEE International Conference on Cloud Computing Technology and Science
2014: MONAMI International Conference on Mobile Networks and Management
2013: WNM Workshop on Internet Measurement
2013: STEM
2010: ATNAC The Australasian Telecommunication Network Application Conference
2010: IWQoS IEEE International Workshop on Quality of Service

ANRW: 2021
ATNAC: 2010
CAN: 2016 2017
CNSM NFV-SDN: 2017
CloudCom: 2015 2016 2017 2018
CoNEXT: 2018 2019 2020 2021 2024
CoNEXT Student Workshop: 2018 2020 2021 2023
DCC: 2015 2017
EPIQ: 2018 2019 2020 2021
GI: 2018 2021
ICCCN: 2019
ICCE: 2016
IMC: 2019 2022 2023
ITC: 2016 2017
ITSec: 2020
IWQoS: 2010
Internet-QoE: 2017 2018 2019
MALENE: 2021
MIPR: 2018
MONAMI: 2014 2015 2016
Man SDN/NFV: 2015 2016
MobiArch: 2018
NFV-SDN: 2016 2017 2018 2019 2020 2021
NOMS: 2020
NSDI: 2024
NetSoft: 2016 2017 2018 2019 2020 2021
NetSys: 2017 2019
Networking: 2021
NoF: 2020 2021 2021
PAM: 2018 2019 2020 2024
PQS: 2016
QCMan: 2015
QoE-Management: 2018 2019
QoMEX: 2017 2018 2019 2020 2021
SCRUM: 2015
SIGCOMM: 2022
SIGCOMM Posters/Demos: 2019 2020
SIGMETRICS: 2022 2023 2024
SecSoN: 2018
TMA: 2020 2021 2022
WNM: 2013

Journal Reviews

2011, 2014, 2015, 2016, 2017, 2019 IEEE COMMAG (IEEE Communications Magazine)
2012, 2016, 2017 IEEE TNSM (IEEE Transactions on Network and Service Management)
2014, 2015, 2016 Springer Mobile Networks and Applications (journal)
2010, 2011, 2012, 2020 TON (IEEE/ACM Transactions on Networking)
2014, 2015 ACM SIGCOMM CCR (ACM SIGCOMM Computer Communication Review)
2016, 2017 ACM TOIT (ACM Transactions on Internet Technology)
2017 ACM TOMM (ACM Transactions on Multimedia Computing Communications and Applications)
2017 Springer MTAP (Spinger Multimedia Tools and Applications)
2017 Elsevier PMC (Elsevier Pervasive and Mobile Computing)
2015 IEEE TVT (IEEE Transactions on Vehicular Technology)
2014 IEEE COMPUTER ()
2020 COMNET (Elsevier Computer Networks)
2013 COMCOM (Elsevier Computer Communications)
2011 IEEE J-SAC (IEEE Journal on Selected Areas in Communications)
2010 AEÜ (International Journal of Electronics and Communications)
2010 IEEE ToB (IEEE Transactions on Broadcasting)
2010 AoT (Annals of Telecommunications)
2009 IEE TMM (IEEE Transactions on Multimedia)

Recent Invited Talks

2021-12-15	DDoS Attacks and Booter Services video talk.cybercni.fr – The monthly Cybersecurity Speaker Series
2021-11-26	What’s in the DDoS jar? Turing Institute - NGN Webinar
2021-09-21	DDoS Attacks and Mitigation University of Twente
2020-12-16	Internet User Behaviour During COVID-19 video IEEE ICOSST Invited Talk
2020-11-09	The Lockdown Effect: Implications of the COVID-19 Pandemic on Internet Traffic video Internet Architecture Board COVID-19 Network Impacts Workshop
2020-10-21	Online Labor - Wir bauen gemeinsam ein Miniatur-Internet video BTU Tag der Lehre 2020 - Gute Lehre im Online-Semester
2019-09-16	DDoS Hide & Seek: On the Effectiveness of a Booter Services Takedown slides Munich Internet Research Retreat
2019-07-08	Is the Web ready for HTTP/2 Server Push? Research colloqium talk, University of Goettingen, Germany
2019-06-13	Is the Web ready for HTTP/2 Server Push? Université catholique de Louvain, Belgium
2019-03-20	Is the Web ready for HTTP/2 Server Push? video Netsys 2019, Outstanding Paper session
2018-11-06	Designing data-driven systems: measurement, analysis Guest lecture, CSCI-2952-E, Brown University, USA
2017-11-30	Understanding the Usage of New Internet Protocols in the Wild slides Munich Internet Research Retreat Raitenhaslach
2017-08-21	Quality of Experience Demystified Keynote Talk Keynote talk ACM SIGCOMM Internet-QoE
2017-08-17	How HTTP/2 pushes the web: An empirical study on utilization and QoE perspective on Server Push International Computer Science Institute, Berkeley, USA
2016-02-29	Kernel Accelerated Packet Processing Invited talk, 1st ITN CleanSky Conference Heidelberg
2015-09-24	Measuring and Optimizing the Cloud Invited talk, ITG 5.2.1 Cloud Workshop, University of Tuebingen
2015-09-16	Invited workshop: Scientific Writing ITN CleanSky Summer School 2015, University of Goettingen
2015-08-20	An Internet Census Taken by an Illegal Botnet Invited talk, Academic Centre of Excellence for Cyber Security Research at University College London
2015-04-15	Software Defined Networking & Network Functions Virtualization invited talk 12. Sitzung des ITG-Fachausschusses 3.3 Übertragungstechnologien für elektronische Medien
2015-04-14	On the origins of spam Invited seminar talk, Project Leonardo RWTH Aachen
2014-11-14	On the origins of spam RWTH Science Night

Other

2017-08-21: Panelist User-centric Networking - Beyond QoE and Engagement, ACM SIGCOMM Internet-QoE 2017 (Los Angeles, USA)

Teaching

	Summer	Winter
2020	Internet - Functionality, Protocols, Applications Internet Measurements and Forensics Operating Systems and Computer Networks for Engineers	Introduction to Computer Networks & Lab [undergrad, de] Introductory Seminar: Trends in Communication Systems [undergrad, de]
2019	Internet - Functionality, Protocols, Applications Internet Measurements and Forensics	Introduction to Computer Networks & Lab [undergrad, de] Introductory Seminar: Trends in Communication Systems [undergrad, de]
2018	Internet Architecture and Performance
2017	Internet Architecture and Performance

RWTH Aachen University: As Lecturer (Lehrbeauftragter):

Lecture: Internet Architecture and Performance
Summer 2017 [Video Recordings]
Summer 2018 [Video Recordings]

RWTH Aachen University:

Lecture: Computer Systems Engineering (Co-Lecturer)
Summer 2015 Winter 2016/2017
Lecture: Research Focus Class: Privacy under Attack (Co-Lecturer)
Summer 2015: details Campus Record
Invited seminar talk:Spam RWTH Leonardo seminar: Das Internet: Globales Kommunikationsmedium und Herrschaftsinstrument
Summer 2015
Lecture: Research Focus Class on Communication Systems: Software Defined Networks (SDN) and Network Functions Virtualization (NFV)
Winter 2014/2015

TU Berlin: As Teaching Assistent

Lecture: Network Protocols and Architectures
Winter 2008 Winter 2009 Winter 2010 Winter 2011 Winter 2012
Advanced Seminar: Network Architectures: Internet Measurement
Winter 2008 Summer 2011 Summer 2013
Advanced Seminar: Network Architectures: Internet Routing
Summer 2009

University of Applied Sciences Darmstadt: As Teaching Assistent

Computer Graphics (lecture + lab course)
Summer 2005

Oliver Hohlfeld

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