CV

I'm a research associate in computer science and head 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).

News

2018-07: paper 3 papers accepted at IMC!
2018-04: misc APNIC blog post Adoption, performance, and human perception of HTTP/2 Server Push appeared
2018-04: teaching Teaching Internet Architecture and Performance this semester
2018-03: service CoNEXT 2018 TPC
2018-03: paper Certificate Authority Authorization (CAA) adoption study accepted at SIGCOMM CCR (with live measurements). [paper]. Joint work with TU Munich, U Sydney, U Twente, Surfnet, and Northeastern University.
2018-03: paper Our measurement based analysis of objectionable/illegal content in Bitcoin's block chain got featured by the morning paper, The Guardian, The Register, Sky News, PCMag, The Outline, and engadget.de, more (Financial Crypto'18 paper)
2018-03: misc Jan and Torsten will present the QUIC, HTTP2, and TCP IW measurements at IETF 101 in London
2018-01: paper 2 PAM paper and 1 poster accepted
2018-01: service TPC invitations: IEEE QoMEX, Internet-QoE, ACM MobiSys MobiArch
2017-12: paper How to give (cloud) customers control over their data? Joint paper with F-Secure, Orange Poland, CERN, HPI, Aalto University accepted at IEEE IC2E.
2017-12: paper Congrats to Roman et al. whose paper on Bitcoin measurements was accepted at Financial Crypto
2017-11: talk Invited talk on HTTP2 @ Munich Internet Research Retreat Raitenhaslach
2017-11: service TPC of 21st IEEE Global Internet Symposium & TMA Shadow PC Co-Chair
2017-10: We'll present a paper on TCP IW measurements and a poster on social network measurements at IMC.
2017-09: service Invited to serve as Poster and Demo Co-Chair for SOSR (with Theo Benson)
2017-08: talk Delighted to give a keynote talk at ACM SIGCOMM Internet-QoE
2017-08: talk We'll present our HTTP2 measurement + QoE work at ICSI / UC Berkeley on Thursday, August 17, 2017, 1:30 PM
2017-08: service Invited to serve as Area TPC Co-Chair for the Network Measurements and Big Data track at ITC30 (with Fabian Bustamante and David Malone)
2017-08: service Serving on the TPC of PAM 2018
2017-07: service Serving on the TPC of CoNEXT CAN 2017 workshop
2017-04: service I am co-organizing this years IMC Shadow PC. Please apply by May 26th!

Research Interests

My research focuses on internet measuremet and management, with an emphasis on improving service quality.

Software Defined Networking / Network Functions Virtualization
Internet Measurement
Quality of Experience / Video & Audio Quality Assessment
Low Latency Networking
Spam
Web Caching

Projects

	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
	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

Awards / Grants

03/2009 - Master's Thesis Award (PDF) (Award Homepage)
Communication in Distributed Systems (KuVS) Group

03/2010 - Master's Thesis Award (Award Announcement Conference Report)
GI/ITG Measurement, Modelling and Evaluation of Computing Systems group.

2011: Student Travel Grant: IEEE INFOCOM, Shanghai, China

Professional Services

Organizing Committees

2018: Publicity Chair: Network Traffic Measurement and Analysis Conference (TMA)
2018: Shadow PC Co-Chair: TMA Shadow PC 2018 (31 PC members)
2017: Shadow PC Co-Chair: IMC Shadow PC 2017 (45+ PC members around the world) [with Ethan Katz-Bassett and Hamed Haddadi]
2017: Organizer: Dagstuhl seminar 17032: Network Function Virtualization in Software Defined Infrastructures
2017: ITC29 Publicity Chair
2017: NetSys PhD Forum Chair
2016: PQS Special Session Chair PQS 2016 special session on Gaming

TPC Chair

2018: Area TPC Co-Chair: ITC 30: Network Measurements and Big Data track[with Fabian Bustamante and David Malone]
2018: Demo+Poster Co-Chair: Symposium on SDN Research (SOSR) (with Theophilus Benson, Brown University)
2017: IEEE IM: QoE Management Workshop IFIP/IEEE International Symposium on 2017 Integrated Network Management: Workshop QoE Management
2017: SDNFlex: Workshop on Software-Defined Networking and Network Functions Virtualization for Flexible Network Management (SDNFlex) [co-located with NetSys 2017]
2016: IEEE QCMan TPC Co-Chair: Forth International Workshop on Quality of Experience Centric Management (co-located with ITC 28)
2015: SDNFlex Initiatitor + TPC Chair: Workshop on Software-Defined Networking and Network Function Virtualization for Flexible Network Management (SDNFlex) [co-located with Netsys 2015]

Technical Program Committee Member

2019: PAM 2019 Passive and Active Measurement (PAM) Conference
2019: NetSys 2019 International Conference on Networked Systems
2018: CoNEXT 2018
2018: CoNEXT EPIQ Workshop Evolution, Performance, and Interoperability of QUIC (EPIQ)
2018: CoNEXT Student Workshop 2018
2018: PAM 2018 Passive and Active Measurement Conference
2018: IEEE NetSoft IEEE Conference on Network Softwarization
2018: IEEE NFV-SDN IEEE Conference on Network Function Virtualization and Software Defined Networks
2018: IEEE GI 21st IEEE Global Internet Symposium
2018: CloudCom 2018
2018: IEEE QoMEX 10th International Conference on Quality of Multimedia Experience
2018: QoE-Management workshop
2018: Internet-QoE co-located with IEEE ICDCS
2018: MobiArch: ACM MobiSys Workshop on Mobility in the Evolving Internet Architecture
2018: ACM SIGCOMM SecSoN ACM SIGCOMM 2018 Workshop on Security in Softwarized Networks
2018: IEEE MIPR IEEE Conference on Multimedia Information Processing and Retrieval
2017: ACM CoNEXT CANCloud-Assisted Networking
2017: ITC29International Teletraffic Congress (ITC-29)
2017: ACM SIGCOMM Internet-QoE workshop
2017: IEEE QoMEX 9th International Conference on Quality of Multimedia Experience
2017: IEEE NFV-SDN IEEE Conference on Network Function Virtualization and Software Defined Networks
2017: CNSM SDN/NFV
2017: IEEE CloudCom
2017: IEEE INFOCOM DCC IEEE INFOCOM Workshop on Distributed Cloud Computing
2017: IEEE NetSoft IEEE Conference on Network Softwarization
2017: NetSys: The International Conference on Networked Systems
2016: IEEE NFV-SDN
2016: IEEE CloudCom premier conference on Cloud Computing
2016: ACM CoNEXT CANCloud-Assisted Networking
2016: MONAMI 8th International Conference on Mobile Networks and Management
2016: ITC: International Teletraffic Congress (ITC-28): Area 4 (Next generation and future Internet architectures)
2016: Man SDN/NFV
2016: PQS: 5th International Workshop on Perceptual Quality of Systems
2016: IEEE ICCE-Berlin: IEEE International Conference on Consumer Electronics
2016: IEEE NetSoft: IEEE Conference on Network Softwarization
2015: SCRUM Strategies for Consistency, Replication, and Understandability in Middleware
2015: IEEE CloudCom premier conference on Cloud Computing
2015: ManSDN/NFV: International Workshop on Management of SDN and NFV Systems
2015: MONAMI 7th International Conference on Mobile Networks and Management
2015: ACM SIGMETRICS DCC ACM SIGMETRICS Workshop on Distributed Cloud Computing
2015: IEEE QCMan IFIP/IEEE Workshop on QoE Centric Management
2014: MONAMI 6th International Conference on Mobile Networks and Management
2013: IEEE WNM Workshop on Internet Measurement
2013: IEEE STEM
2010: ATNAC: The Australasian Telecommunication Network Application Conference 2010, Auckland, New Zealand (Internet Technology Track)
2010: IEEE IWQoS: 18th IEEE International Workshop on Quality of Service 2010, Tsinghua University, Beijing, China
2010: ACM SIGMETRICS (Shadow TPC), Columbia University, New York

Conference Referee

2015: IEEE MASCOTS ACM TVX IEEE QoMEX/
2013: IEEE CyberC, IEEE P2P, IEEE Globecom
2012: EUSIPCO 2012, MMB 2012, EUSIPCO,
2011: IEEE ISCC
2010: NGI, IEEE IPDPS, ITC
2009: Euro-NGI 2009 INFOCOM PAM,
2008: IWQoS, P2P

Journal Referee

2011, 2014, 2015, 2016, 2017: 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
2010, 2011, 2012: 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
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: ToB: IEEE Transactions on Broadcasting
2010: AoT: Annals of Telecommunications
2009: TMM: IEEE Transactions on Multimedia

Editorial Boards

2018: Guest editor: IEEE JSAC Special Issue on SDN Scalability
2017,2018: Guest editor: Elsevier Computer Networks Special issue on Security and Performance of SDN/NFV
2016, 2017: Guest editor: Springer Quality and User Experience journal: Topic Collection on QoE Network Management
2015, 2016, 2017: Editorial board: KuVS newsletter
2015: Guest-editor Wiley Journal of Network Management: Special issue on SDN & NFV (Editorial)

Proposal Reviewer

2009: Euro-NF Joint Research Project proposal

Scribe

2011: IMC 2011: Supporting the IMC TPC meeting held in New Jersey, USA.

Member

ITG 5.2.1: System Architecture and Traffic Engineering interest group

Recent invited talks

2017-11-30: Understanding the Usage of New Internet Protocols in the Wild (Invited talk, Munich Internet Research Retreat Raitenhaslach)
2017-08-21: Quality of Experience Demystified (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

RWTH Aachen University: As Lecturer (Lehrbeauftragter):

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

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

Media Coverage

Press

2018: The Guardian: Child abuse imagery found within bitcoin's blockchain (archive)
2018: The Register: Bitcoin's blockchain: Potentially a hazardous waste dump of child abuse, malware, etc (archive)
2018: Sky News: Child abuse images hidden in Bitcoin blockchain (archive)
2018: PCMag: Bitcoin's Blockchain Caught Loaded with Child Pornography (archive)
2018: The Outline: If you downloaded the Bitcoin blockchain, you may have downloaded child porn: A new paper reveals some troubling implications for the blockchain when no one oversees what’s on it. (archive)
2018: engadget.de: Das Problem der Blockchain mit illegalen Inhalten (archive)
2018: Hacker News: Illegal content embedded in the blockchain (archive)
2018: The Register: Google's 'QUIC' TCP alternative slow to excite anyone outside Google (archive)
2015: Unicum: Spam-Mails: Ein Informatiker auf der Jagd nach der dubiosen Netzbranche
2015: Aachener Nachrichten: Wer versendet eigentlich die Spammails?
2014: FAZ: Im Netz der bösen Jungs
2014: business impact (Issue 4/2014): Mail Flut
2014: Slashdot: Researchers Outline Spammers' Business Ecosystem
2014: The Register: Boffins pen 'Guide to better spamming'
2014: Net Security: Relations between spam landscape actors can be leveraged for detection
2014: WinFuture: Forscher dringen in Welt der Spammer ein und finden Kundentreue
2014: Threat post: A Spam Trinity: Email Harvesters, Botmasters, Spammers
2014: Slashdot: Internet Census 2012 Data Examined: Authentic, But Chaotic and Unethical

Radio

2014: Deutschlandfunk Computer und Kommunikation: Spam im Blick

Oliver Hohlfeld

CV