EDBT 2026 Demo / reviewers in the wild / expert
Kelvin Lubbertsen
dblp:353/7524
· DBLP profile ↗
4ranked-venue papers
1as first author
4since 2021 · last 2025
—ORCID · none
Domains — the database's venue-derived domains; a paper can count in several
Security and privacy · 4 · 1 first-author · 4 since 2021Software engineering, systems software and programming languages · 1 · 1 since 2021
| Year | Publication | Venue | Position |
|---|---|---|---|
| 2025 | Bitcoin Battle: Burning Bitcoin for Geopolitical Fun and Profit
Kris Oosthoek, Kelvin Lubbertsen, Georgios Smaragdakis |
ICBC | 2 |
| 2025 | A Longitudinal Analysis of LockBit 3.0's Extortion Lifecycle and Response to Law EnforcementabstractIn this study, we present a 532-day longitudinal analysis of LockBit 3.0’s leak site. We track 1,856 victims across multiple states-countdown, data publication, deletion, and relisting-and reconstruct a structured, three-stage extortion lifecycle: (1) pre-listing negotiation, (2) countdown negotiation, and (3) post-leak monetization. We find that $8.5 \%$ of countdownstate victims are deleted before their data is published, suggesting private settlements. In the post-leak phase, victims with price tags exhibit significantly more variable deletion timing compared to those without, despite sharing the same median exposure. This indicates that LockBit actively manages some listings after data publication, potentially extending monetization or negotiation efforts.We also measure the operational impact of law enforcement actions-including Operation Cronos and affiliate arrests-on LockBit’s infrastructure and victim activity. While the group rapidly restored services after takedowns, we observe a sustained decline in new victim onboarding, reduced infrastructure redundancy, and delayed payment behavior, suggesting long-term weakening.To our knowledge, this is the first empirical study to model a ransomware extortion lifecycle based on continuous monitoring of leak site behavior. Our findings provide actionable insights into ransomware monetization tactics, negotiation patterns, and post-takedown adaptation. Yin Minn Pa Pa, Yuji Sekine, Yamato Kawaguchi, Tatsuki Yogo, Kelvin Lubbertsen, Rolf van Wegberg, Michel van Eeten, Katsunari Yoshioka |
RAID | 5 |
| 2025 | Ghost Clusters: Evaluating Attribution of Illicit Services through Cryptocurrency Tracing
Kelvin Lubbertsen, Michel van Eeten, Rolf van Wegberg |
USENIX Security Symposium | 1 |
| 2023 | Mixed Signals: Analyzing Ground-Truth Data on the Users and Economics of a Bitcoin Mixing Service
Fieke Miedema, Kelvin Lubbertsen, Verena Schrama, Rolf van Wegberg |
USENIX Security Symposium | 2 |