CV

I’m a Professor and head the Chair of Computer Networks at Brandenburg University of Technology (BTU). Before, I headed the Network Architectures group at the chair for Communication and Distributed Systems at RWTH Aachen University. 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).

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.

News

2020-09paperStudy on the effects of Cross-Signing on the Security of the Web Public Key Infrastructure Security accepted at CCS’20
2020-09serviceI’ll serve as General Chair for PAM 2021 www.pam2021.b-tu.de - send us great work!
2020-09miscKuVS newsletter August edition released - featuring 4 reports on our virtual conference / covid-19 traffic research.
2020-08paperHow did Internet traffic change during the pandemic? IMC pre-print available: arxiv.org/abs/2008.10959
2020-08paperContact-tracing apps have become a vital tool for reducing the spread of COVID-19. When Germany launched its own, millions of users downloaded it. What are the traffic characteristic / geographic spreak? Find out in this poster paper presented at SIGCOMM 2020 this week.
2020-07paperTwo paper will appear at IMC: 1) Impact of Covid-19 on Internet traffic and 2) an analysis of domain classification services.
2020-06paperTwo papers will appear in the SIGCOMM CCR July edition: 1) a participants experience view on PAM as the first virtual conference in our community 2) Tracking the deployment of TLS 1.3 on the Web: A story of experimentation and centralization
2020-06miscA report on Daniel’s talk @ BTU on the DE-CIX IXP appeared at BTU News June 2020
2020-06paperNew paper: Word-Emoji embeddings from large scale messaging data reflect real world semantic associations of expressive icons appeared at ICWSM Emoji 2020
2020-03paperQoMEX 2020 paper on Multi-episodic Perceived Quality of an Audio-on-Demand Service accepted
2020-03serviceTPC of CoNEXT 2020
2020-02miscDagstuhl seminar proposal on climate-friendly Internet research got accepted
2019-11serviceTPC of TMA 2020
2019-09paperI gave a sneak preview of our upcoming IMC paper on booter-based DDoS attacks at the Munich Internet Research Retreat
2019-09paperOur QUIC QoE study will appear at CoNEXT this year

Awards

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

PhD Committees

2019-12-18Improving Anycast with Measurements
Wouter de Vries
University of Twente, Netherlands
2019-06-13Dissecting HTTP/2 and QUIC: Measurement
Jawad Manzoor
UC Louvain, Belgium
2019-01-18Revisiting the Interplay of Inter-Domain Traffic and Routing Policies
Thomas Krenc
TU Berlin, Germany

Technical Program Committee Member

  1. 2020: CoNEXT ACM International Conference on emerging Networking EXperiments and Technologies
  2. 2020: CoNEXT Student Workshop PhD student workshop
  3. 2020: SIGCOMM Posters/Demos ACM SIGCOMM Posters, Demos, and Student Research Competition
  4. 2020: EPIQ Workshop on Evolution, Performance, and Interoperability of QUIC (EPIQ)
  5. 2020: TMA Network Traffic Measurement and Analysis Conference
  6. 2020: PAM Passive and Active Measurement Conference
  7. 2020: NetSoft IEEE Conference on Network Softwarization
  8. 2020: NFV-SDN IEEE NFV-SDN
  9. 2020: QoMEX IEEE International Conference on Quality of Multimedia Experience
  10. 2020: NOMS IEEE/IFIP Network Operations and Management Symposium
  11. 2020: NoF IEEE International Conference on Networks of the Future (NoF)
  12. 2020: ITSec ITG Workshop on IT Security (ITSec)
  13. 2019: IMC ACM Internet Measurement Conference
  14. 2019: CoNEXT ACM International Conference on emerging Networking EXperiments and Technologies
  15. 2019: PAM Passive and Active Measurement Conference
  16. 2019: ICCCN IEEE International Conference on Computer Communications and Networks
  17. 2019: NetSoft IEEE Conference on Network Softwarization
  18. 2019: NFV-SDN IEEE NFV-SDN
  19. 2019: QoMEX IEEE International Conference on Quality of Multimedia Experience
  20. 2019: Internet-QoE Internet QoE Workshop
  21. 2019: QoE-Management International Workshop on Quality of Experience Management
  22. 2019: NetSys International Conference on Networked Systems
  23. 2019: SIGCOMM Posters/Demos ACM SIGCOMM Posters, Demos, and Student Research Competition
  24. 2019: EPIQ Workshop on Evolution, Performance, and Interoperability of QUIC (EPIQ)
  25. 2018: MIPR IEEE Conference on Multimedia Information Processing and Retrieval
  26. 2018: EPIQ Workshop on Evolution, Performance, and Interoperability of QUIC (EPIQ)
  27. 2018: CoNEXT Student Workshop PhD student workshop
  28. 2018: PAM Passive and Active Measurement Conference
  29. 2018: NetSoft IEEE Conference on Network Softwarization
  30. 2018: NFV-SDN IEEE NFV-SDN
  31. 2018: GI IEEE Global Internet Symposium
  32. 2018: CloudCom IEEE International Conference on Cloud Computing Technology and Science
  33. 2018: QoMEX IEEE International Conference on Quality of Multimedia Experience
  34. 2018: QoE-Management International Workshop on Quality of Experience Management
  35. 2018: CoNEXT ACM International Conference on emerging Networking EXperiments and Technologies
  36. 2018: MobiArch Workshop on Mobility in the Evolving Internet Architecture
  37. 2018: SecSoN ACM SIGCOMM 2018 Workshop on Security in Softwarized Networks
  38. 2018: Internet-QoE Internet QoE Workshop
  39. 2017: CAN Cloud-Assisted Networking Workshop
  40. 2017: ITC International Teletraffic Congress
  41. 2017: Internet-QoE Internet QoE Workshop
  42. 2017: QoMEX IEEE International Conference on Quality of Multimedia Experience
  43. 2017: NFV-SDN IEEE NFV-SDN
  44. 2017: CNSM NFV-SDN
  45. 2017: CloudCom IEEE International Conference on Cloud Computing Technology and Science
  46. 2017: DCC Workshop on Distributed Cloud Computing
  47. 2017: NetSoft IEEE Conference on Network Softwarization
  48. 2017: NetSys International Conference on Networked Systems
  49. 2016: NetSoft IEEE Conference on Network Softwarization
  50. 2016: CloudCom IEEE International Conference on Cloud Computing Technology and Science
  51. 2016: CAN Cloud-Assisted Networking Workshop
  52. 2016: MONAMI International Conference on Mobile Networks and Management
  53. 2016: ITC International Teletraffic Congress
  54. 2016: NFV-SDN IEEE NFV-SDN
  55. 2016: PQS International Workshop on Perceptual Quality of Systems
  56. 2016: ICCE IEEE International Conference on Consumer Electronics
  57. 2016: Man SDN/NFV International Workshop on Management of SDN and NFV Systems
  58. 2015: SCRUM Strategies for Consistency, Replication, and Understandability in Middleware
  59. 2015: CloudCom IEEE International Conference on Cloud Computing Technology and Science
  60. 2015: Man SDN/NFV International Workshop on Management of SDN and NFV Systems
  61. 2015: DCC Workshop on Distributed Cloud Computing
  62. 2015: QCMan IFIP/IEEE Workshop on QoE Centric Management
  63. 2015: MONAMI International Conference on Mobile Networks and Management
  64. 2014: MONAMI International Conference on Mobile Networks and Management
  65. 2013: WNM Workshop on Internet Measurement
  66. 2013: STEM
  67. 2010: ATNAC The Australasian Telecommunication Network Application Conference
  68. 2010: IWQoS IEEE International Workshop on Quality of Service
  1. ATNAC: 2010
  2. CAN: 2016 2017
  3. CNSM NFV-SDN: 2017
  4. CloudCom: 2015 2016 2017 2018
  5. CoNEXT: 2018 2019 2020
  6. CoNEXT Student Workshop: 2018 2020
  7. DCC: 2015 2017
  8. EPIQ: 2018 2019 2020
  9. GI: 2018
  10. ICCCN: 2019
  11. ICCE: 2016
  12. IMC: 2019
  13. ITC: 2016 2017
  14. ITSec: 2020
  15. IWQoS: 2010
  16. Internet-QoE: 2017 2018 2019
  17. MIPR: 2018
  18. MONAMI: 2014 2015 2016
  19. Man SDN/NFV: 2015 2016
  20. MobiArch: 2018
  21. NFV-SDN: 2016 2017 2018 2019 2020
  22. NOMS: 2020
  23. NetSoft: 2016 2017 2018 2019 2020
  24. NetSys: 2017 2019
  25. NoF: 2020
  26. PAM: 2018 2019 2020
  27. PQS: 2016
  28. QCMan: 2015
  29. QoE-Management: 2018 2019
  30. QoMEX: 2017 2018 2019 2020
  31. SCRUM: 2015
  32. SIGCOMM Posters/Demos: 2019 2020
  33. SecSoN: 2018
  34. TMA: 2020
  35. WNM: 2013

Journal Reviews

  1. 2011, 2014, 2015, 2016, 2017, 2019 IEEE COMMAG (IEEE Communications Magazine)
  2. 2012, 2016, 2017 IEEE TNSM (IEEE Transactions on Network and Service Management)
  3. 2014, 2015, 2016 Springer Mobile Networks and Applications (journal)
  4. 2010, 2011, 2012, 2020 TON (IEEE/ACM Transactions on Networking)
  5. 2014, 2015 ACM SIGCOMM CCR (ACM SIGCOMM Computer Communication Review)
  6. 2016, 2017 ACM TOIT (ACM Transactions on Internet Technology)
  7. 2017 ACM TOMM (ACM Transactions on Multimedia Computing Communications and Applications)
  8. 2017 Springer MTAP (Spinger Multimedia Tools and Applications)
  9. 2017 Elsevier PMC (Elsevier Pervasive and Mobile Computing)
  10. 2015 IEEE TVT (IEEE Transactions on Vehicular Technology)
  11. 2014 IEEE COMPUTER ()
  12. 2020 COMNET (Elsevier Computer Networks)
  13. 2013 COMCOM (Elsevier Computer Communications)
  14. 2011 IEEE J-SAC (IEEE Journal on Selected Areas in Communications)
  15. 2010 AEÜ (International Journal of Electronics and Communications)
  16. 2010 IEEE ToB (IEEE Transactions on Broadcasting)
  17. 2010 AoT (Annals of Telecommunications)
  18. 2009 IEE TMM (IEEE Transactions on Multimedia)

Recent Invited Talks

2019-09-16DDoS Hide & Seek: On the Effectiveness of a Booter Services Takedown slides
Munich Internet Research Retreat
2019-07-08Is the Web ready for HTTP/2 Server Push?
Research colloqium talk, University of Goettingen, Germany
2019-06-13Is the Web ready for HTTP/2 Server Push?
Université catholique de Louvain, Belgium
2019-03-20Is the Web ready for HTTP/2 Server Push? video
Netsys 2019, Outstanding Paper session
2018-11-06Designing data-driven systems: measurement, analysis
Guest lecture, CSCI-2952-E, Brown University, USA
2017-11-30Understanding the Usage of New Internet Protocols in the Wild slides
Munich Internet Research Retreat Raitenhaslach
2017-08-21Quality of Experience Demystified Keynote Talk
Keynote talk ACM SIGCOMM Internet-QoE
2017-08-17How HTTP/2 pushes the web: An empirical study on utilization and QoE perspective on Server Push
International Computer Science Institute, Berkeley, USA
2016-02-29Kernel Accelerated Packet Processing
Invited talk, 1st ITN CleanSky Conference Heidelberg
2015-09-24Measuring and Optimizing the Cloud
Invited talk, ITG 5.2.1 Cloud Workshop, University of Tuebingen
2015-09-16Invited workshop: Scientific Writing
ITN CleanSky Summer School 2015, University of Goettingen
2015-08-20An Internet Census Taken by an Illegal Botnet
Invited talk, Academic Centre of Excellence for Cyber Security Research at University College London
2015-04-15Software Defined Networking & Network Functions Virtualization
invited talk 12. Sitzung des ITG-Fachausschusses 3.3 Übertragungstechnologien für elektronische Medien
2015-04-14On the origins of spam
Invited seminar talk, Project Leonardo RWTH Aachen
2014-11-14On the origins of spam
RWTH Science Night

Other

Teaching

SummerWinter
2020
2019
2018Internet Architecture and Performance
2017Internet Architecture and Performance
RWTH Aachen University: As Lecturer (Lehrbeauftragter):RWTH Aachen University:TU Berlin: As Teaching AssistentUniversity of Applied Sciences Darmstadt: As Teaching Assistent
Oliver Hohlfeld Photo

Address:
Oliver Hohlfeld
Brandenburg University of Technology
Chair of Computer Networks
Konrad-Wachsmann-Allee 5
03046 Cottbus, Germany
Map
Email: oliver dot hohlfeld at b-tu /DOT/ de
GPG Key
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Chair of Computer Networks
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Publications
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Netray Internet Observatory

netray.IO
QUIC Adoption
HTTP2 Adoption
TCP Initial Window Configurations
Certificate Authority Authorization (CAA)

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