Index

Jenny Ottmann

Publications:

2025

Rzepka, L., Ottmann, J., Stoykova, R., Freiling, F., & Baier, H. (2025). A scenario-based quality assessment of memory acquisition tools and its investigative implications. Forensic Science International: Digital Investigation, 52. https://doi.org/10.1016/j.fsidi.2025.301868

2024

Rzepka, L., Ottmann, J., Freiling, F., & Baier, H. (2024). Causal Inconsistencies Are Normal in Windows Memory Dumps (Too). Digital Threats: Research and Practice, 5(3). https://doi.org/10.1145/3680293
Savchenko, E., Ottmann, J., & Freiling, F. (2024). In the time loop: Data remanence in main memory of virtual machines. Forensic Science International: Digital Investigation, 49. https://doi.org/10.1016/j.fsidi.2024.301758

2023

Geus, J., Ottmann, J., & Freiling, F. (2023). Systematic Evaluation of Forensic Data Acquisition using Smartphone Local Backup. In Proceedings of the Digital Forensics Research Conference USA (DFRWS USA) 2023. Baltimore, MD.
Ottmann, J., Breitinger, F., & Freiling, F. (2023). An Experimental Assessment of Inconsistencies in Memory Forensics. ACM Transactions on Privacy and Security, 27(1). https://doi.org/10.1145/3628600
Ottmann, J., Cengiz, Ü., Breitinger, F., & Freiling, F. (2023). As if Time Had Stopped – Checking Memory Dumps for Quasi-Instantaneous Consistency. In Proceedings of the Digital Forensics Research Conference USA (DFRWS USA) 2023. Baltimore, MD.

2022

Ottmann, J., Breitinger, F., & Freiling, F. (2022). Defining Atomicity (and Integrity) for Snapshots of Storage in Forensic Computing. In Proceedings of the Digital Forensics Research Conference Europe (DFRWS EU) 2022. Oxford.
URL: https://dfrws.org/presentation/defining-atomicity-and-integrity-for-snapshots-of-storage-in-forensic-computing/

2021

Ottmann, J., Pollach, J., Scheler, N., Schneider, J., Rückert, C., & Freiling, F. (2021). Zur Blackbox-Problematik im Bereich Mobilfunkforensik. Datenschutz und Datensicherheit, 45, 546-552. https://doi.org/10.1007/s11623-021-1487-1

2019

Benenson, Z., Berger, F., Cherepantsev, A., Datsevich, S., Do, L., Eckert, M.,... Zlatanovic, J. (2019). Analyse verbreiteter Anwendungen zum Lesen von elektronischen Büchern.
URL: http://nbn-resolving.de/urn:nbn:de:bvb:29-opus4-125519

2018

Wirth, M., Gradl, S., Poimann, D., Richer, R., Ottmann, J., & Eskofier, B. (2018). Exploring the Feasibility of EMG Based Interaction for Assessing Cognitive Capacity in Virtual Reality. In Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS (pp. 4953-4956). Honolulu, HI, USA: Institute of Electrical and Electronics Engineers Inc..

Being a member of Prof. Freiling’s forensic computing group and research training group 2475 “Cybercrime and Forensic Computing“, my research and teaching focus on digital forensics and cybercriminalistics. In my doctoral research (defended in spring 2024), I focused on foundational qualities of digital traces, i.e., its expressiveness and relevance. Before obtaining my doctorate at the FAU, I gathered practical experience in the field of digital investigations. I hold an M.Sc. in the subject of “Digital Forensics” (2021) and another one in the subject of “Computer Science & Media” (2016). In my spare time, I like to contribute to DFIR-related open-source projects.

A chronological list of publications in which I was involved can be found here in BibTeX-format.

2024

Gruber, J. & Freiling, F. (in press). The Cyber-traceological Model: A Model-based View of the Cybercriminalistic Task. In: Proceedings of the Digital Forensics Research Conference Asia Pacific (DFRWS APAC) 2024. Best Student Paper Award. Link: dfrws.org
Lindenmeier, C., Gruber, J. & Freiling, F. (in press). InvesTEE: A TEE-supported Framework for Lawful Remote Forensic Investigations. In: 13th International Conference on IT Security Incident Management and IT Forensics (IMF 2024)
Lindenmeier, C., Hammer, A., Gruber, J., Röckl, J., & Freiling, F. (2024). Key extraction-based lawful access to encrypted data: Taxonomy and survey. Forensic Science International: Digital Investigation, 50, 301796. DOI: 10.1016/j.fsidi.2024.301796
Gruber, J. (2024). Evidential Relevance and Expressiveness of Digital Traces: An Investigative Perspective. Doctoral Thesis. DOI: 10.25593/open-fau-577

2023

Gruber, J., Voigt, L. & Freiling, F. (2023). Faktoren erfolgreicher Cybercrime-Ermittlungen. Kriminalistik 77(5). Abstract
Gruber, J., Humml, M. (2023). A Formal Treatment of Expressiveness and Relevance of Digital Evidence. In: Dewald, A. & Schreck, T. (Eds.), 12th International Conference on IT Security Incident Management and IT Forensics (IMF 2023). DOI: 10.1016/10.1145/3608485
Gruber, J., Hargreaves, C. & Freiling, F. (2023). Contamination of Digital Evidence: Understanding an Underexposed Risk. In: Proceedings of the Digital Forensics Research Conference Europe (DFRWS EU) 2023. Best Student Paper Award. DOI: 10.1016/j.fsidi.2023.301501
Gruber, J., Humml, M., Schröder, L. & Freiling, F. (2023). Formal Verification of Necessary and Sufficient Evidence in Forensic Event Reconstruction. In: Proceedings of the Digital Forensics Research Conference Europe (DFRWS EU) 2023. Link: dfrws.org
Gruber, J. (2023). Identifizierung von Malware-Infrastruktur mittels verteilter Spamtrap-Systeme. In: Ude, A., Sicherheit in vernetzten Systemen – 30. DFN-Konferenz. (S. A1-A27). Link: Google Books

2022

Gruber, J., Voigt, L., Benenson, Z. & Freiling, F. (2022). Foundations of Cybercriminalistics: From General Process Models to Case-Specific Concretizations in Cybercrime Investigations. In: Proceedings of the Digital Forensics Research Conference Asia Pacific (DFRWS APAC) 2022. Best Student Paper Award. Link: dfrws.org
Gruber, J., Brodowski, D. & Freiling, F. (2022). Die polizeiliche Aufgabe und Pflicht zur digitalen Gefahrenabwehr. Zeitschrift für das Gesamte Sicherheitsrecht-GSZ 5(4), 171–177. Link: beck-online.de
Deuber, D., Gruber, J., Humml, M., Ronge, V. & Scheler, N. (2022). Argumentation Schemes for Blockchain Deanonymization. In: Proc. of JURISIN, 273–286.
Gruber, J. & Freiling, F., (2022). Fighting Evasive Malware: How to Pass the Reverse Turing Test By Utilizing a VMI-Based Human Interaction Simulator. In: Wressnegger, C., Reinhardt, D., Barber, T., Witt, B. C., Arp, D. & Mann, Z. (Hrsg.), SICHERHEIT 2022. Karlsruhe: Gesellschaft für Informatik e.V. (S. 49-64). DOI: 10.18420/sicherheit2022_03; Published as Gruber, J. & Freiling, F. (2022). Fighting Evasive Malware. Datenschutz und Datensicherheit-DuD 46(5), 284–290 . DOI: 10.1007/s11623-022-1604-9

2017

Schmitz, R. & Gruber, J. (2017). Commutative watermarking-encryption of audio data with minimum knowledge verification. Advances in Multimedia, 2017. DOI: 10.1155/2017/5879257

I am assisting with teaching several courses at the extra occupational study program “Digital Forensics”, which is offered by Albstadt-Sigmaringen University in cooperation with Saarland University and the FAU. Now and then, I am involved in supporting the IT certificate program OpenC³S.

Course	Institution	Lecturer
Basics of Digital Forensics	HS AlbSig & OpenC³S	Prof. Dr.-Ing. Felix Freiling
Reverse Engineering	HS AlbSig	Dr. Werner Massonne
Live Analyse	HS AlbSig	Prof. Holger Morgenstern
Browser and Application Forensics	HS AlbSig	Prof. Dr.-Ing. Konstantin Bayreuther

PGP

Fingerprint:	545A D8ED CF4C 747F 3621 61CD 05F6 9677 911B E18C
Public Key:	ASCII-armored

S/MIME

Serial	26:87:22:00:48:3A:5F:6F:B1:23:D8:0E
SHA-1 Fingerprint:	4F:BE:D6:E5:35:46:B4:F6:6D:62:19:F5:CA:C7:BE:45:10:C7:25:A9
S/MIME Certificate Chain	DFN-Verein Global Issuing CA < DFN-Verein Certification Authority 2 < T-TeleSec GlobalRoot Class 2
S/MIME Certificate	PEM/DER

Back to Staff and Research Groups

Andreas Hammer

Publications

2024

Hammer A., Cerny C., Jung C., Eichenmüller C., Freiling F.:
Increasing Street Credibility: Cartography-aware Forensic Analysis of GNSS Trace Validity
13th International Conference on IT Security Incident Management & IT Forensics
In: Proceedings of the 13th International Conference on IT Security Incident Management & IT Forensics 2024
DOI: 10.1145/3688809
Hammer A., Geus J., Nicolai F., Schütz P., Fein C., Freiling F.:
Fit for Forensics: Taxonomy and Common Model for Forensic Analysis of Fitness Trackers
13th International Conference on IT Security Incident Management & IT Forensics
In: Proceedings of the 13th International Conference on IT Security Incident Management & IT Forensics 2024
DOI: 10.1145/3687271
Lindenmeier C., Hammer A., Gruber J., Röckl J., Freiling F.:
Key extraction-based lawful access to encrypted data: Taxonomy and survey
In: Forensic Science International: Digital Investigation 50 (2024), Article No.: 301796
ISSN: 2666-2817
DOI: 10.1016/j.fsidi.2024.301796
Wunder J., Corona A., Hammer A., Benenson Z.:
On NVD Users’ Attitudes, Experiences, Hopes and Hurdles
In: Digital Threats: Research and Practice (2024)
ISSN: 2576-5337
DOI: 10.1145/3688806

2023

Hammer A., Ohlig M., Geus J., Freiling F.:
A Functional Classification of Forensic Access to Storage and its Legal Implications
12th International Conference on IT Security Incident Management & IT Forensics (Munich, 23. May 2023 - 24. May 2023)
In: Proceedings of the 12th International Conference on IT Security Incident Management & IT Forensics 2023
DOI: 10.1145/3609231

2022

Büter R., Engst G., Esser K., Freiling F., Friedrich K., Friedrich T., Hammer A., Heine L., Heinlein L., Korn O., Minuth C., Müller M., Müller N., Reithmeier J., Ripley N., Schulze M., Sievers M., Srikhaolan C., Zenk J.:
A Comparison of Cloud Storage Technologies as Sources of Digital Evidence
CS-2022-01 (2022)
ISSN: 2191-5008
Open Access: https://nbn-resolving.org/urn:nbn:de:bvb:29-opus4-210457
URL: https://nbn-resolving.org/urn:nbn:de:bvb:29-opus4-210457
(Working Paper)

2019

Benenson Z., Berger F., Cherepantsev A., Datsevich S., Do L., Eckert M., Elsberger T., Freiling F., Frinken M., Glameyer H., Hafner S., Hagenhoff S., Hammer A., Hammerl S., Hantke F., Heindorf F., Henninger M., Höfer D., Kuhrt P., Lattka M., Leis T., Leubner C., Leyrer K., Lindenmeier C., Del Medico K., Moussa D., Nissen M., Öz A., Ottmann J., Reif K., Ripley N., Roth A., Schilling J., Schleicher R., Schulz D., Stephan M., Volkert C., Wehner M., Wild M., Wirth J., Wolf J., Wunder J., Zlatanovic J.:
Analyse verbreiteter Anwendungen zum Lesen von elektronischen Büchern
CS-2019-06 (2019)
Open Access: http://nbn-resolving.de/urn:nbn:de:bvb:29-opus4-125519
URL: http://nbn-resolving.de/urn:nbn:de:bvb:29-opus4-125519
(Working Paper)

Julian Geus

I studied computer science at FAU and am a PhD candidate in Prof. Freiling’s Forensic Computing Group.

My current research centers around Mobile Device Security and Forensics, on Android and iOS devices.
My interests also include various topics in system security and hardware security. If you are interested in research collaborations, or in a thesis or project in one of my fields of research, please feel free to contact me.

Publications:

2024

Hammer, A., Geus, J., Nicolai, F., Schütz, P., Fein, C., & Freiling, F. (2024). Fit for Forensics: Taxonomy and Common Model for Forensic Analysis of Fitness Trackers. In Proceedings of the 13th International Conference on IT Security Incident Management & IT Forensics.
Stachak, M., Geus, J., Pugliese, G., & Freiling, F. (2024). Nyon Unchained: Forensic Analysis of Bosch’s eBike Board Computers. In Digital Forensics Research Conference Europe (DFRWS EU) (pp. 1-11). Zaragoza, ES.

2023

Geus, J., Ottmann, J., & Freiling, F. (2023). Systematic Evaluation of Forensic Data Acquisition using Smartphone Local Backup. In Proceedings of the Digital Forensics Research Conference USA (DFRWS USA) 2023. Baltimore, MD.
Hammer, A., Ohlig, M., Geus, J., & Freiling, F. (2023). A Functional Classification of Forensic Access to Storage and its Legal Implications. In Proceedings of the 12th International Conference on IT Security Incident Management & IT Forensics. Munich, DE: ACM.

2019

Ziegler, A., Geus, J., Heinloth, B., Hönig, T., & Lohmann, D. (2019). Honey, I Shrunk the ELFs: Lightweight Binary Tailoring of Shared Libraries. Transactions on Embedded Computing Systems, 18(5s), 102:1-102:23. https://doi.org/10.1145/3358222
URL: https://dl.acm.org/citation.cfm?id=3358222

Email Signature, S/MIME

You can use the following S/MIME certificate to verify that an email was actually sent by me. More information on S/MIME can be found here.

Serial Number	79:9A:FE:43:E0:99:2E:4C:A0:3C:BE:BF:0A:CB:82:AE
SHA1 Fingerprint	14:63:D2:CF:EA:49:2C:48:82:76:DC:08:B0:19:69:3B:3B:49:F3:92
SHA256 Fingerprint	E1:09:70:92:7B:EC:48:B1:B0:6C:98:91:D8:E6:87:F7:6D:72:07:44:B0:F5:AA:4D:27:6A:89:23:A4:DF:BA:D1

Lena Voigt

Publications

2025

Pohl, N., Voigt, L., Hargreaves, C.J., Fein, C., & Freiling, F. (2025). DiskForge: Timestomping on Disk Images for Educational Benefit. Digital Threats: Research and Practice. https://doi.org/10.1145/3748265
Voigt, L., Freiling, F., & Hargreaves, C.J. (2025). A metrics-based look at disk images: Insights and applications. Forensic Science International: Digital Investigation, 52, 301874. https://doi.org/10.1016/j.fsidi.2025.301874

Lisa Dreier

Publications:

2024

Dreier LM., Vanini C., Hargreaves CJ., Breitinger F., Freiling F.:
Beyond timestamps: Integrating implicit timing information into digital forensic timelines
In: Forensic Science International: Digital Investigation 49 (2024), Article No.: 301755
ISSN: 2666-2817
DOI: 10.1016/j.fsidi.2024.301755
URL: https://www.sciencedirect.com/science/article/pii/S266628172400074X
Schneider J., Eichhorn M., Dreier LM., Hargreaves CJ.:
Applying digital stratigraphy to the problem of recycled storage media
DFRWS USA 2024 (Baton Rouge, 9. July 2024 - 12. July 2024)
In: Elsevier (ed.): Forensic Science International: Digital Investigation 2024
DOI: 10.1016/j.fsidi.2024.301761
URL: https://www.sciencedirect.com/science/article/pii/S2666281724000805

Maximilian Eichhorn

Publications

2025

Schneider, J., Fukami, A., Lautner, I., Eichhorn, M., Moussa, D., Wolf, J.,... Westman, M. (2025). Poor Sanitization Practices and Questionable Digital Evidence: a Comprehensive Study of Scope and Impact of Recycled NAND Flash Chips. IEEE Transactions on Dependable and Secure Computing. https://doi.org/10.1109/TDSC.2025.3579237

2024

Eichhorn, M., & Pugliese, G. (2024). Do You “Relay” Want to Give Me Away? – Forensic Cues of Smart Relays and Their IoT Companion Apps. Forensic Science International: Digital Investigation, 50, 1-10. https://doi.org/10.1016/j.fsidi.2024.301810
URL: https://www.sciencedirect.com/science/article/pii/S2666281724001343
Eichhorn, M., Schneider, J., & Pugliese, G. (2024). Well Played, Suspect! – Forensic Examination of the Handheld Gaming Console “Steam Deck”. Forensic Science International: Digital Investigation, 48, 1-10. https://doi.org/10.1016/j.fsidi.2023.301688
URL: https://www.sciencedirect.com/science/article/pii/S266628172300207X
Schneider, J., Eichhorn, M., Dreier, L.M., & Hargreaves, C.J. (2024). Applying digital stratigraphy to the problem of recycled storage media. In Elsevier (Eds.), Forensic Science International: Digital Investigation. Baton Rouge, US: Elsevier.
URL: https://www.sciencedirect.com/science/article/pii/S2666281724000805

2022

Schneider, J., Eichhorn, M., & Freiling, F. (2022). Ambiguous File System Partitions. In Elsevier (Eds.), Forensic Science International: Digital Investigation. On the Internet, US.
URL: https://www.sciencedirect.com/science/article/pii/S2666281722000804

Index

2025

2024

2023

2022

2021

2019

2018

About

Publications

2024

2023

2022

2017

Teaching

E-Mail Security

PGP

S/MIME

2024

2023

2022

2019

Publications:

2024

2023

2019

Email Signature, S/MIME

S/MIME Certificate (PEM)

S/MIME Chain (PEM)

Publications

2025

2024

2023

2022

2024

Publications

2025

2024

2022