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ORCIDRalph Holz
Ralph-Günther Holz
Person information
- affiliation: University of Twente, The Netherlands
- affiliation: University of Münster, Germany
- affiliation (former): University of Sydney, School of IT, NSW, Australia
- affiliation (former): TU Munich, Faculty of Computer Science, Germany
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2020 – today
- 2026
[c41]Shyam Krishna Khadka
, Suzan Bayhan, Ralph Holz, Cristian Hesselman:
Detecting and Characterizing DDoS Scrubbing from Global BGP Routing: Insights from Five Leading Scrubbers. PAM 2026: 17-43- [c40]Bernhard Degen, Nils Kempen, K. C. Claffy, Ricky K. P. Mok, Ralph Holz, Roland van Rijswijk-Deij, Raffaele Sommese, Mattijs Jonker:
Through a Smaller Lens: Revisiting Opportunistic Analysis Using Network Telescopes. PAM 2026: 294-318 - 2025
- [c39]Bulut Ulukapi, Anna Sperotto, Ralph Holz:
Towards Understanding Middlebox Deployments in Dutch ASes: Impact of IP Sampling Size. ANRW 2025: 174-176 - [c38]Gustavo Luvizotto Cesar, Gurur Öndarö, Jonas Kaspereit, Fabian Ising, Sebastian Schinzel, Mattijs Jonker, Ralph Holz:
Characterizing Hosting and Security Practices for Public-Facing LDAP Servers. CNSM 2025: 1-9 - [c37]Shyam Krishna Khadka, Suzan Bayhan, Ralph Holz, Saeedeh Shokoohi, Marinho Barcellos, Cristian Hesselman:
A First Look at the Adoption of BGP-based DDoS Scrubbing Services: A 5-year Longitudinal Analysis. CNSM 2025: 1-7 - [c36]Sousan Tarahomi, Raffaele Sommese, Jeroen Linssen, Ralph Holz, Anna Sperotto:
Double-Edged Sword: An Empirical Study on the Contribution of Cloud Providers in Malicious Infrastructure. CNSM 2025: 1-7 - [c35]Bulut Ulukapi, Anna Sperotto, Ralph Holz:
Investigating Middlebox Deployment and Characteristics in Dutch Autonomous Systems. CNSM 2025: 1-7 - [c34]Bulut Ulukapi, Anna Sperotto, Ralph Holz:
Tracing Vendors: A Middlebox-Centric Study of Network Interference. EuroS&P (Workshops) 2025: 176-186 - [c33]Niousha Nazemi, Omid Tavallaie, Shuaijun Chen, Anna Maria Mandalari, Kanchana Thilakarathna, Ralph Holz, Hamed Haddadi, Albert Y. Zomaya:
ACCESS-FL: Agile Communication and Computation for Efficient Secure Aggregation in Stable Networks for FLaaS. ICWS 2025: 1-7 - [c32]Mostafa Ansar, Anna Sperotto, Ralph Holz:
Web Crawl Refusals: Insights From Common Crawl. PAM 2025: 197-214 - 2024
- [c31]Shyam Krishna Khadka, Suzan Bayhan, Ralph Holz, Cristian Hesselman:
Assessing the security of Internet paths: A case study of Dutch critical infrastructures. ANRW 2024 - [c30]Sousan Tarahomi, Raffaele Sommese, Pieter-Tjerk de Boer, Jeroen Linssen, Ralph Holz, Anna Sperotto:
Is a Name Enough? A First Look into Detecting Clouds Using DNS Pointer Records. CNSM 2024: 1-5 - [c29]Niousha Nazemi, Omid Tavallaie, Shuaijun Chen, Albert Y. Zomaya, Ralph Holz:
Boosting Communication Efficiency of Federated Learning's Secure Aggregation. DSN-S 2024: 157-158 - [c28]Jonas Kaspereit, Gurur Öndarö, Gustavo Luvizotto Cesar, Simon Ebbers, Fabian Ising, Christoph Saatjohann, Mattijs Jonker, Ralph Holz, Sebastian Schinzel:
LanDscAPe: Exploring LDAP weaknesses and data leaks at Internet scale. USENIX Security Symposium 2024 - [i17]Niousha Nazemi, Omid Tavallaie, Shuaijun Chen, Albert Y. Zomaya, Ralph Holz:
Boosting Communication Efficiency of Federated Learning's Secure Aggregation. CoRR abs/2405.01144 (2024) - [i16]Niousha Nazemi, Omid Tavallaie, Anna Maria Mandalari, Hamed Haddadi, Ralph Holz, Albert Y. Zomaya:
Analysis of DNS Dependencies and their Security Implications in Australia: A Comparative Study of General and Indigenous Populations. CoRR abs/2408.12958 (2024) - [i15]Niousha Nazemi, Omid Tavallaie, Shuaijun Chen, Anna Maria Mandalari, Kanchana Thilakarathna, Ralph Holz, Hamed Haddadi, Albert Y. Zomaya:
ACCESS-FL: Agile Communication and Computation for Efficient Secure Aggregation in Stable Federated Learning Networks. CoRR abs/2409.01722 (2024) - 2023
- [j11]Patrick Sattler, Johannes Zirngibl, Mattijs Jonker, Oliver Gasser, Georg Carle, Ralph Holz:
Packed to the Brim: Investigating the Impact of Highly Responsive Prefixes on Internet-wide Measurement Campaigns. PACMNET 1(CoNEXT3): 24:1-24:21 (2023) - [c27]Niousha Nazemi, Omid Tavallaie, Albert Y. Zomaya, Ralph Holz:
DNS Dependencies as an Expression of the Digital Divide: The Example of Australia. ESORICS Workshops (2) 2023: 496-509 - [c26]Shyam Krishna Khadka, Ralph Holz, Cristian Hesselman:
Towards Security Transparency of Autonomous Systems on the Internet. ESORICS Workshops (2) 2023: 510-513 - [c25]Sousan Tarahomi, Ralph Holz, Anna Sperotto:
Quantifying Security Risks in Cloud Infrastructures: A Data-driven Approach. NetSoft 2023: 346-349 - [c24]Ramin Yazdani, Yevheniya Nosyk, Ralph Holz, Maciej Korczynski, Mattijs Jonker, Anna Sperotto:
Hazardous Echoes: The DNS Resolvers that Should Be Put on Mute. TMA 2023: 1-10 - [i14]Patrick Sattler, Johannes Zirngibl, Mattijs Jonker, Oliver Gasser, Georg Carle, Ralph Holz:
Packed to the Brim: Investigating the Impact of Highly Responsive Prefixes on Internet-wide Measurement Campaigns. CoRR abs/2310.17012 (2023) - 2022
- [c23]Leandro M. Bertholdo, Sandro L. A. Ferreira, João M. Ceron, Lisandro Zambenedetti Granville, Ralph Holz, Roland van Rijswijk-Deij:
On the Asymmetry of Internet eXchange Points -Why Should IXPs and CDNs Care? CNSM 2022: 73-81 - 2020
- [j10]Ralph Holz, Jens Hiller, Johanna Amann, Abbas Razaghpanah, Thomas Jost, Narseo Vallina-Rodriguez, Oliver Hohlfeld:
Tracking the deployment of TLS 1.3 on the web: a story of experimentation and centralization. Comput. Commun. Rev. 50(3): 3-15 (2020) - [j9]Ralph Holz, Marco Mellia, Olivier Bonaventure, Hamed Haddadi, Matthew Caesar, Sergey Gorinsky, Gianni Antichi, Joseph Camp, K. C. Claffy, Bhaskaran Raman, Anna Sperotto, Aline Carneiro Viana, Steve Uhlig:
Update on ACM SIGCOMM CCR reviewing process: towards a more open review process. Comput. Commun. Rev. 50(3): 55-56 (2020) - [j8]Kwon Nung Choi, Harini Kolamunna, Akila Uyanwatta, Kanchana Thilakarathna, Suranga Seneviratne, Ralph Holz, Mahbub Hassan, Albert Y. Zomaya:
LoRadar: LoRa sensor network monitoring through passive packet sniffing. Comput. Commun. Rev. 50(4): 10-24 (2020) - [j7]Cristian Hesselman, Paola Grosso, Ralph Holz, Fernando Kuipers, Janet Hui Xue, Mattijs Jonker, Joeri de Ruiter, Anna Sperotto, Roland van Rijswijk-Deij, Giovane C. M. Moura, Aiko Pras, Cees de Laat:
A Responsible Internet to Increase Trust in the Digital World. J. Netw. Syst. Manag. 28(4): 882-922 (2020) - [c22]Gerry Wan, Liz Izhikevich, David Adrian, Katsunari Yoshioka, Ralph Holz, Christian Rossow, Zakir Durumeric:
On the Origin of Scanning: The Impact of Location on Internet-Wide Scans. Internet Measurement Conference 2020: 662-679 - [c21]Kalana Abeywardena, Jiawei Zhao, Lexi Brent, Suranga Seneviratne, Ralph Holz:
Triplet Mining-based Phishing Webpage Detection. LCN 2020: 377-380 - [c20]Ralph Holz, Diego Perino, Matteo Varvello, Johanna Amann, Andrea Continella, Nate Evans, Ilias Leontiadis, Christopher Natoli, Quirin Scheitle:
A Retrospective Analysis of User Exposure to (Illicit) Cryptocurrency Mining on the Web. TMA 2020 - [i13]Ralph Holz, Diego Perino, Matteo Varvello, Johanna Amann, Andrea Continella, Nate Evans, Ilias Leontiadis, Christopher Natoli, Quirin Scheitle:
A Retrospective Analysis of User Exposure to (Illicit) Cryptocurrency Mining on the Web. CoRR abs/2004.13239 (2020) - [i12]Finnegan Waugh, Ralph Holz:
An empirical study of availability and reliability properties of the Bitcoin Lightning Network. CoRR abs/2006.14358 (2020)
2010 – 2019
- 2019
- [j6]Alberto Dainotti, Ralph Holz, Mirja Kühlewind, Andra Lutu, Joel Sommers, Brian Trammell:
Open collaborative hyperpapers: a call to action. Comput. Commun. Rev. 49(1): 31-33 (2019) - [i11]Ralph Holz, Johanna Amann, Abbas Razaghpanah, Narseo Vallina-Rodriguez:
The Era of TLS 1.3: Measuring Deployment and Use with Active and Passive Methods. CoRR abs/1907.12762 (2019) - 2018
- [j5]Quirin Scheitle, Taejoong Chung, Jens Hiller, Oliver Gasser, Johannes Naab, Roland van Rijswijk-Deij, Oliver Hohlfeld, Ralph Holz, David R. Choffnes, Alan Mislove, Georg Carle:
A First Look at Certification Authority Authorization (CAA). Comput. Commun. Rev. 48(2): 10-23 (2018) - [c19]Quirin Scheitle, Taejoong Chung, Johanna Amann, Oliver Gasser, Lexi Brent, Georg Carle, Ralph Holz, Jens Hiller, Johannes Naab, Roland van Rijswijk-Deij, Oliver Hohlfeld, David R. Choffnes, Alan Mislove:
Measuring Adoption of Security Additions to the HTTPS Ecosystem. ANRW 2018: 1-2 - [c18]Quirin Scheitle, Oliver Gasser, Theodor Nolte, Johanna Amann, Lexi Brent, Georg Carle, Ralph Holz, Thomas C. Schmidt, Matthias Wählisch:
The Rise of Certificate Transparency and Its Implications on the Internet Ecosystem. Internet Measurement Conference 2018: 343-349 - [c17]Oliver Gasser, Benjamin Hof, Max Helm, Maciej Korczynski, Ralph Holz, Georg Carle:
In Log We Trust: Revealing Poor Security Practices with Certificate Transparency Logs and Internet Measurements. PAM 2018: 173-185 - [i10]Lexi Brent, Anton Jurisevic, Michael Kong, Eric Liu, François Gauthier, Vincent Gramoli, Ralph Holz, Bernhard Scholz:
Vandal: A Scalable Security Analysis Framework for Smart Contracts. CoRR abs/1809.03981 (2018) - [i9]Quirin Scheitle, Oliver Gasser, Theodor Nolte, Johanna Amann, Lexi Brent, Georg Carle, Ralph Holz, Thomas C. Schmidt, Matthias Wählisch:
The Rise of Certificate Transparency and Its Implications on the Internet Ecosystem. CoRR abs/1809.08325 (2018) - 2017
- [c16]Jun Young Kim, Ralph Holz, Wen Hu, Sanjay Jha:
Automated Analysis of Secure Internet of Things Protocols. ACSAC 2017: 238-249 - [c15]Johanna Amann, Oliver Gasser, Quirin Scheitle, Lexi Brent, Georg Carle, Ralph Holz:
Mission accomplished?: HTTPS security after diginotar. Internet Measurement Conference 2017: 325-340 - [c14]Ingo Weber, Vincent Gramoli, Alexander Ponomarev, Mark Staples, Ralph Holz, An Binh Tran, Paul Rimba:
On Availability for Blockchain-Based Systems. SRDS 2017: 64-73 - 2016
- [j4]Johann Schlamp, Ralph Holz, Quentin Jacquemart, Georg Carle, Ernst W. Biersack:
HEAP: Reliable Assessment of BGP Hijacking Attacks. IEEE J. Sel. Areas Commun. 34(6): 1849-1861 (2016) - [c13]Dario Banfi, Olivier Mehani, Guillaume Jourjon, Lukas Schwaighofer, Ralph Holz:
Endpoint-Transparent Multipath Transport with Software-Defined Networks. LCN 2016: 307-315 - [c12]Ralph Holz, Johanna Amann, Olivier Mehani, Mohamed Ali Kâafar, Matthias Wachs:
TLS in the Wild: An Internet-wide Analysis of TLS-based Protocols for Electronic Communication. NDSS 2016 - [i8]Luke Anderson, Ralph Holz, Alexander Ponomarev, Paul Rimba, Ingo Weber:
New kids on the block: an analysis of modern blockchains. CoRR abs/1606.06530 (2016) - [i7]Johann Schlamp, Ralph Holz, Quentin Jacquemart, Georg Carle, Ernst W. Biersack:
HEAP: Reliable Assessment of BGP Hijacking Attacks. CoRR abs/1607.00096 (2016) - [i6]Dario Banfi, Olivier Mehani, Guillaume Jourjon, Lukas Schwaighofer, Ralph Holz:
Endpoint-transparent Multipath Transport with Software-defined Networks. CoRR abs/1608.04579 (2016) - 2015
- [c11]Len Bass, Ralph Holz, Paul Rimba, An Binh Tran, Liming Zhu:
Securing a Deployment Pipeline. RELENG@ICSE 2015: 4-7 - [c10]Olivier Mehani, Ralph Holz, Simone Ferlin, Roksana Boreli:
An Early Look at Multipath TCP Deployment in the Wild. HotPlanet@MobiCom 2015: 7-12 - [c9]Johann Schlamp, Ralph Holz, Oliver Gasser, Andreas Korsten, Quentin Jacquemart, Georg Carle, Ernst W. Biersack:
Investigating the Nature of Routing Anomalies: Closing in on Subprefix Hijacking Attacks. TMA 2015: 173-187 - [i5]Ralph Holz, Johanna Amann, Olivier Mehani, Matthias Wachs, Mohamed Ali Kâafar:
TLS in the wild: an Internet-wide analysis of TLS-based protocols for electronic communication. CoRR abs/1511.00341 (2015) - [i4]Yaron Sheffer, Ralph Holz, Peter Saint-Andre:
Summarizing Known Attacks on Transport Layer Security (TLS) and Datagram TLS (DTLS). RFC 7457: 1-13 (2015) - [i3]Yaron Sheffer, Ralph Holz, Peter Saint-Andre:
Recommendations for Secure Use of Transport Layer Security (TLS) and Datagram Transport Layer Security (DTLS). RFC 7525: 1-27 (2015) - 2014
- [b1]Ralph-Günther Holz:
Empirical analysis of Public Key Infrastructures and Investigation of Improvements. Technical University Munich, 2014, ISBN 3-937201-41-6 - [c8]Oliver Gasser, Ralph Holz, Georg Carle:
A deeper understanding of SSH: Results from Internet-wide scans. NOMS 2014: 1-9 - 2012
- [c7]Ralph Holz, Thomas Riedmaier, Nils Kammenhuber, Georg Carle:
X.509 Forensics: Detecting and Localising the SSL/TLS Men-in-the-Middle. ESORICS 2012: 217-234 - 2011
- [j3]Holger Kinkelin, Ralph Holz, Heiko Niedermayer, Simon Mittelberger, Georg Carle:
On Using TPM for Secure Identities in Future Home Networks. Future Internet 3(1): 1-13 (2011) - [c6]Alexander Ulrich, Ralph Holz, Peter Hauck, Georg Carle:
Investigating the OpenPGP Web of Trust. ESORICS 2011: 489-507 - [c5]Ralph Holz, Lothar Braun, Nils Kammenhuber, Georg Carle:
The SSL landscape: a thorough analysis of the x.509 PKI using active and passive measurements. Internet Measurement Conference 2011: 427-444 - 2010
- [j2]Dirk Haage, Ralph Holz:
Towards Measurement Consolidation for Overlay Optimization and Service Placement. Prax. Inf.verarb. Kommun. 33(1): 12-15 (2010) - [c4]Ali Fessi, Nathan Evans, Heiko Niedermayer, Ralph Holz:
Pr2-P2PSIP: privacy preserving P2P signaling for VoIP and IM. IPTComm 2010: 134-145
2000 – 2009
- 2009
- [c3]Heiko Niedermayer, Ralph Holz, Marc-Oliver Pahl, Georg Carle:
On Using Home Networks and Cloud Computing for a Future Internet of Things. FIS 2009: 70-80 - [c2]Dirk Haage, Ralph Holz, Heiko Niedermayer, Pavel Laskov:
CLIO - A Cross-Layer Information Service for Overlay Network Optimization. KiVS 2009: 279-284 - 2008
- [j1]Oliver P. Waldhorst, Christian Blankenhorn, Dirk Haage, Ralph Holz, Gerald G. Koch, Boris Koldehofe, Fleming Lampi, Christoph P. Mayer, Sebastian Mies:
Spontaneous Virtual Networks: On the Road Towards the Internet's Next Generation. it Inf. Technol. 50(6): 367-375 (2008) - [c1]Ralph Holz, Heiko Niedermayer, Peter Hauck, Georg Carle:
Trust-Rated Authentication for Domain-Structured Distributed Systems. EuroPKI 2008: 74-88 - [i2]Marc Dacier, Ulrich Flegel, Ralph Holz, Norbert Luttenberger:
08102 Working Group -- Intrusion and Fraud Detection for Web Services. Network Attack Detection and Defense 2008 - [i1]Richard A. Kemmerer, Roland Büschkes, Ali Fessi, Hartmut König, Peter Herrmann, Stephen D. Wolthusen, Marko Jahnke, Hervé Debar, Ralph Holz, Tanja Zseby, Dirk Haage:
08102 Outcome Working Group -- Situational Awareness. Network Attack Detection and Defense 2008
Coauthor Index
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