Tobias Feigl

Friedrich-Alexander-Universität Erlangen-Nürnberg · Germany

Unclaimed · AI-structured profileORCID OpenAlex

ML-security researcher at FAU Erlangen-Nürnberg: model watermarking, IP protection, certified tracing for GNSS

papers here

reviewed by Evolve

first-author

corresponding

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works · OpenAlex

h-index · OpenAlex

Bibliometric figures come from OpenAlex (2026-10-16) and cover the author's entire public record, not just the papers listed here. Reproducibility signal comes from Evolve's own reviews.

Research profile

Output—

The output axis, which would aggregate total publication volume and per-year production into a comparable score, currently has insufficient underlying data and is therefore left unscored rather than estimated.

Impact—

The impact axis, which would capture citation-based influence such as aggregate citations and per-paper reception, has insufficient underlying data here; even with h-index 17 and i10-index 24 on record, no impact score is computed or estimated.

Focus0/100

The focus score of 0 reflects a wide topical spread in the underlying OpenAlex topics: indoor/outdoor localization (40 works), GNSS positioning and interference (33), optical wireless communication (19), inertial navigation (16), and adversarial robustness in machine learning (16), with the reviewed-paper field split evenly at 0.5 between watermarking/IP security and ML security with applied cryptography. Recent output centers on ML security, but the record overall spans several distinct areas, hence the low concentration score.

Collaboration41/100

Collaboration scores 41, based on only 7 distinct coauthors in the last three years alongside 45 recent works. The reviewed 2026 papers both place Feigl in a middle author position without corresponding status, and the recurring coauthor set — Christopher Mutschler, Redwanul Karim, Felix Ott, Nisha L. Raichur, and Lucas Heublein — points to a stable, small, institution-centered team rather than a broad external network.

Activity100/100

Activity scores a maximum 100: OpenAlex records 45 works in the last three years, with countsByYear climbing from 10 works in 2022 to 16 in 2024, 18 in 2025, and 11 already in 2026 — the strongest sustained run since the record's continuous series began with 3 works in 2017.

Reproducibility55/100

Reproducibility scores 55 (reproMean) across the 2 papers Evolve has assessed, both rated medium reproducibility readiness. TwinMark and ZK-Trace ship broad experiments, yet Evolve's verdicts note gaps — vacuous survival certificates on attacked cells in TwinMark and an untested independence assumption in ZK-Trace — so the mid-range score captures solid empirical work alongside open verification questions.

Research summary

Tobias Feigl is a researcher at Friedrich-Alexander-Universität Erlangen-Nürnberg whose OpenAlex-resolved record spans localization engineering and machine-learning security. Topic counts are led by indoor and outdoor localization technologies (40), GNSS positioning and interference (33), optical wireless communication (19), inertial sensor navigation (16), and adversarial robustness in machine learning (16); Evolve's field attribution for the reviewed papers splits evenly between machine-learning security for model watermarking/IP protection and machine-learning security with applied cryptography. The two cataloged 2026 arXiv papers — TwinMark, a dual-channel watermark surviving feature and logit distillation, and ZK-Trace, zero-knowledge collusion tracing for federated GNSS interference monitoring — both list him as a middle author, consistent with a coauthorship pattern anchored by Christopher Mutschler, Redwanul Karim, and Felix Ott. Bibliometric indicators include h-index 17 and i10-index 24, with 45 works in the last three years and a steeply rising curve: 16 works in 2024, 18 in 2025, and 11 already in 2026. Consequently the activity dimension scores 100, while collaboration sits at 41 with only 7 distinct recent coauthors; reproducibility is scored 55 from 2 assessed papers, and the output and impact axes remain unscored for lack of data. The same record also lists a handful of 1994–1997 works, treated here as a probable identity-resolution artifact.

Collaboration pattern

Feigl's recent collaboration footprint is compact: 45 works over the last three years involve only 7 distinct coauthors (collaboration dimension 41). The recurring partners — Christopher Mutschler, Redwanul Karim, Felix Ott, Nisha L. Raichur, and Lucas Heublein — suggest an Erlangen-centered working group, and both 2026 catalog papers list him as a middle author without corresponding status, consistent with a specialist contributor inside a stable team rather than an independently led, externally networked research line.

Research keywords

model watermarkingknowledge distillationownership verificationintellectual property protectionmodel extraction attacksfederated learningtraitor tracingTardos fingerprintingzero-knowledge proofscollusion resistanceGNSS interference monitoringcovariance descriptors

Highlights

TwinMark: a dual-channel watermark proven to survive feature and logit distillation
In this 2026 arXiv paper (middle author), Feigl and colleagues embed one watermark in both features and logits so model ownership verification survives knowledge distillation in either regime; Evolve credits broad, strong experiments while cautioning that the survival certificates are vacuous on every attacked cell.
ZK-Trace: certified collusion tracing for federated GNSS interference monitoring
This 2026 arXiv paper (middle author) combines Tardos fingerprinting with zero-knowledge credentials to trace colluding leakers in federated GNSS interference monitoring; Evolve finds the certified bounds rigorous but notes that soundness rests on an as-yet untested independence assumption.
Sharpest output run in the record: 45 works in three years
OpenAlex countsByYear shows 16 works in 2024, 18 in 2025, and 11 already in 2026 — a sustained acceleration to 45 works over the last three years, which drives the activity dimension to its maximum score of 100.

Timeline

2017OpenAlex records 3 works, the start of the current continuous publication series in the provided data.
202210 works recorded — the strongest single year in the series up to that point.
202416 works recorded, a marked step up in annual output.
202518 works recorded, the highest annual count in the provided data.
2026TwinMark and ZK-Trace appear on arXiv, with 11 works already recorded this year.

Papers in the Evolve catalog

Frequent co-authors

Christopher Mutschler×2 Redwanul Karim×1 Felix Ott×1 Redwanul Karim×1 Nisha L. Raichur×1 Lucas Heublein×1 Felix Ott×1

About this profile

This profile is AI-structured by Evolve.Pub from public bibliographic data (OpenAlex) and Evolve's own paper reviews. It is not written or endorsed by the researcher unless the profile is claimed. Radar dimensions are computed from real bibliometrics with fixed formulas — raw figures are shown alongside; missing dimensions mean insufficient data, never zero. Errors? Claim the profile to correct or hide it.

Bibliometric indicators (h-index 17, i10-index 24, countsByYear, topics) come from an OpenAlex name-resolved record and are not independently verified.
The record lists a few works in 1994–1997, inconsistent with the continuous series from 2017 onward; this is likely an identity-resolution artifact, and those early counts were excluded from the narrative.
Only 2 papers have been reviewed for reproducibility, so the reproducibility score rests on a very small sample.
Both cataloged papers are 2026 arXiv preprints with middle authorship; peer-review status and venue acceptance are not stated in the data.