Publications

2026

Franziska Bumiller, Sarah Delgado Rodriguez, Lukas Mecke, Verena Distler, and Florian Alt. 2026. Too Many Zombies: Exploring Challenges and Motivations for (Not) Deleting Unused Online Accounts. In Proceedings of the 2026 CHI Conference on Human Factors in Computing Systems (CHI '26). Association for Computing Machinery, New York, NY, USA, Article 336, 1–20. https://doi.org/10.1145/3772318.3790497

2025

Sarah Delgado Rodriguez, Sarah Elisabeth Winterberg, Franziska Bumiller, Felix Dietz, Florian Alt, and Mariam Hassib. 2025. XSec Companions: Exploring the Design of Cybersecurity Companions. In 2025 European Symposium on Usable Security (EuroUSEC), September 2025. 204-220. https://doi.org/10.1109/EuroUSEC69254.2025.00028

Sarah Delgado Rodriguez, Lukas Mecke, Ismael Prieto Romero, Melina Bregenzer, and Florian Alt. 2025. Let the Door Handle It: Exploring Biometric User Recognition Embedded in Doors. In Proceedings of the Mensch und Computer 2025 (MuC ’25), August 30, 2025. Association for Computing Machinery, New York, NY, USA, 281–292. https://doi.org/10.1145/3743049.3743075

Sarah Delgado Rodriguez, Vitus Maierhöfer, Yara Youssef, Lena M. Nischwitz, Tamara Friedenberger, Philipp Thalhammer, Philipp S. Fabritius, and Martina Emmert. 2025. 18th Workshop “Be-greifbare Interaktion.” 2025. Gesellschaft für Informatik e.V., 10.18420/muc2025. Retrieved March 31, 2026 from https://dl.gi.de/handle/20.500.12116/46865

Sarah Delgado Rodriguez, Maximiliane Windl, Florian Alt, and Karola Marky. 2025. The TaPSI Research Framework - A Systematization of Knowledge on Tangible Privacy and Security Interfaces. In Proceedings of the 2025 CHI Conference on Human Factors in Computing Systems, April 26, 2025. ACM, Yokohama Japan, 1–28. https://doi.org/10.1145/3706598.3713968

2024

Rosa van Koningsbruggen, Sarah Delgado Rodriguez, Vitus Maierhöfer, Hannes Waldschütz, Yara Youssef, Max Kullmann, and Lena Nischwitz. 2024. 17th Workshop “Be-greifbare Interaktion.” 2024. Gesellschaft für Informatik e.V., 10.18420/muc2024. Retrieved March 31, 2026 from https://dl.gi.de/handle/20.500.12116/44378

Sarah Delgado Rodriguez, Priyasha Chatterjee, Anh Dao Phuong, Florian Alt, and Karola Marky. 2024. Do You Need to Touch? Exploring Correlations between Personal Attributes and Preferences for Tangible Privacy Mechanisms. In Proceedings of the 2024 CHI Conference on Human Factors in Computing Systems (CHI ’24), May 11, 2024. Association for Computing Machinery, New York, NY, USA, 1–23. https://doi.org/10.1145/3613904.3642863 [Received an Honorable Mention Award at CHI2024]

Sarah Delgado Rodriguez, Sarah Prange, Lukas Mecke, and Florian Alt. 2024. Act2Auth – A Novel Authentication Concept based on Embedded Tangible Interaction at Desks. In Proceedings of the Eighteenth International Conference on Tangible, Embedded, and Embodied Interaction (TEI ’24), February 11, 2024. Association for Computing Machinery, New York, NY, USA, 1–15. https://doi.org/10.1145/3623509.3633360

2023

Sarah Delgado Rodriguez, Anh Dao Phuong, Franziska Bumiller, Lukas Mecke, Felix Dietz, Florian Alt, and Mariam Hassib. 2023. Padlock, the Universal Security Symbol? - Exploring Symbols and Metaphors for Privacy and Security. In Proceedings of the 22nd International Conference on Mobile and Ubiquitous Multimedia (MUM ’23), December 03, 2023. Association for Computing Machinery, New York, NY, USA, 10–24. https://doi.org/10.1145/3626705.3627770

Vanessa Voigt, Raffael Wiethe, Chanakarn Sassmann, Moritz Will, Sarah Delgado Rodriguez, and Florian Alt. 2023. Safe Call: A Tangible Smartphone Interface That Supports Safe and Easy Phone Calls and Contacts Management for Older People. In Proceedings of the 22nd International Conference on Mobile and Ubiquitous Multimedia (MUM ’23), December 03, 2023. Association for Computing Machinery, New York, NY, USA, 562–564. https://doi.org/10.1145/3626705.3631878

Andreas Schmid, Rosa van Koningsbruggen, Sarah Delgado Rodriguez, Vitus Maierhöfer, Hannes Waldschütz, and Alexander Kalus. 2023. 16. Workshop Be-greifbare Interaktion. 2023. GI, 10.18420/muc2023. Retrieved March 31, 2026 from https://dl.gi.de/handle/20.500.12116/42102

Lukas Mecke, Ismael Prieto Romero, Sarah Delgado Rodriguez, and Florian Alt. 2023. Exploring the Use of Electromagnets to Influence Key Targeting on Physical Keyboards. In Extended Abstracts of the 2023 CHI Conference on Human Factors in Computing Systems (CHI EA ’23), April 19, 2023. Association for Computing Machinery, New York, NY, USA, 1–8. https://doi.org/10.1145/3544549.3585703

Sarah Delgado Rodriguez, Oliver Hein, Ismael Prieto Romero, Lukas Mecke, Felix Dietz, Sarah Prange, and Florian Alt. 2023. Shake-It-All: A Toolkit for Sensing Tangible Interactions on Everyday Objects. April 23, 2023. Beyond Prototyping: Future Paradigms for Electronics Toolkits (CHI2023 Workshop). https://beyondprototyping.github.io/WorkshopWeb2023/assets/papers/beyond_prototyping_23-final26.pdf

Sarah Delgado Rodriguez, Radiah Rivu, Ville Mäkelä, and Florian Alt. 2023. Challenges in Virtual Reality Studies: Ethics and Internal and External Validity. In Proceedings of the Augmented Humans International Conference 2023 (AHs ’23), March 14, 2023. Association for Computing Machinery, New York, NY, USA, 105–111. https://doi.org/10.1145/3582700.3582716

2022

Sarah Delgado Rodriguez, Sarah Prange, Pascal Knierim, Karola Marky, and Florian Alt. 2022. Experiencing Tangible Privacy Control for Smart Homes with PriKey. In Proceedings of the 21st International Conference on Mobile and Ubiquitous Multimedia (MUM ’22), December 29, 2022. Association for Computing Machinery, New York, NY, USA, 298–300. https://doi.org/10.1145/3568444.3570585

Sarah Prange, Sarah Delgado Rodriguez, Lukas Mecke, and Florian Alt. 2022. “I saw your partner naked”: Exploring Privacy Challenges During Video-based Online Meetings. In Proceedings of the 21st International Conference on Mobile and Ubiquitous Multimedia (MUM ’22), December 29, 2022. Association for Computing Machinery, New York, NY, USA, 71–82. https://doi.org/10.1145/3568444.3568468

Sarah Delgado Rodriguez, Sarah Prange, Christina Vergara Ossenberg, Markus Henkel, Florian Alt, and Karola Marky. 2022. PriKey – Investigating Tangible Privacy Control for Smart Home Inhabitants and Visitors. In Nordic Human-Computer Interaction Conference (NordiCHI ’22), October 08, 2022. Association for Computing Machinery, New York, NY, USA, 1–13. https://doi.org/10.1145/3546155.3546640

Szilvia Balogh, Tobias Daniel, Sarah Delgado Rodriguez, Ismael Prieto Romero, and Florian Alt. 2022. Rubik’s Cube Auth - A Tangible Authentication Mechanism Using A Standard Rubik’s Cube. 2022. Gesellschaft für Informatik e.V., 10.18420/muc2022. Retrieved March 31, 2026 from https://dl.gi.de/handle/20.500.12116/39108

Linda Hirsch, Andreas Schmid, Rosa van Koningsbruggen, Sarah Delgado Rodriguez, Dennis Dietz, Maximiliane Windl, and Vitus Maierhöfer. 2022. 15. Workshop Be-greifbare Interaktion. 2022. Gesellschaft für Informatik e.V., 10.18420/muc2022. Retrieved March 31, 2026 from https://dl.gi.de/handle/20.500.12116/39066

Delgado Rodriguez, Sarah, Lukas Mecke, and Florian Alt. 2022. SenseHandle: Investigating Human-Door Interaction Behaviour for Authentication in the Physical World | USENIX. In Poster, August 07, 2022. USENIX, Boston, MA. Retrieved February 8, 2025 from https://www.usenix.org/conference/soups2022/presentation/delgado-rodriguez-poster

Sarah Prange, Sarah Delgado Rodriguez, Timo Doeding, and Florian Alt. 2022. “Where did you first meet the owner?” – Exploring Usable Authentication for Smart Home Visitors. In Extended Abstracts of the 2022 CHI Conference on Human Factors in Computing Systems (CHI EA ’22), April 28, 2022. Association for Computing Machinery, New York, NY, USA, 1–7. https://doi.org/10.1145/3491101.3519777

Stefan Schneegass, Alia Saad, Roman Heger, Sarah Delgado Rodriguez, Romina Poguntke, and Florian Alt. 2022. An Investigation of Shoulder Surfing Attacks on Touch-Based Unlock Events. Proc. ACM Hum.-Comput. Interact. 6, MHCI (September 2022), 207:1-207:14. https://doi.org/10.1145/3546742

2021

Rivu Radiah, Ville Mäkelä, Sarah Prange, Sarah Delgado Rodriguez, Robin Piening, Yumeng Zhou, Kay Köhle, Ken Pfeuffer, Yomna Abdelrahman, Matthias Hoppe, Albrecht Schmidt, and Florian Alt. 2021. Remote VR Studies: A Framework for Running Virtual Reality Studies Remotely Via Participant-Owned HMDs. ACM Trans. Comput.-Hum. Interact. 28, 6 (November 2021), 46:1-46:36. https://doi.org/10.1145/3472617

Sarah Delgado Rodriguez, Sarah Prange, and Florian Alt. 2021. Take Your Security and Privacy Into Your Own Hands! Why Security and Privacy Assistants Should be Tangible. 2021. Gesellschaft für Informatik e.V., 10.18420/muc2021. Retrieved March 31, 2026 from https://dl.gi.de/handle/20.500.12116/37360

Sarah Delgado Rodriguez, Sarah Prange, Lukas Mecke, and Florian Alt. 2021. ActPad – A Smart Desk Platform to Enable User Interaction with IoT Devices. In Extended Abstracts of the 2021 CHI Conference on Human Factors in Computing Systems (CHI EA ’21), May 08, 2021. Association for Computing Machinery, New York, NY, USA, 1–6. https://doi.org/10.1145/3411763.3451825

2020

Ken Pfeuffer, Lukas Mecke, Sarah Delgado Rodriguez, Mariam Hassib, Hannah Maier, and Florian Alt. 2020. Empirical Evaluation of Gaze-enhanced Menus in Virtual Reality. In Proceedings of the 26th ACM Symposium on Virtual Reality Software and Technology (VRST ’20), November 01, 2020. Association for Computing Machinery, New York, NY, USA, 1–11. https://doi.org/10.1145/3385956.3418962

2019

Lukas Mecke, Sarah Delgado Rodriguez, Daniel Buschek, Sarah Prange, and Florian Alt. 2019. Communicating Device Confidence Level and Upcoming Re-Authentications in Continuous Authentication Systems on Mobile Devices. 2019. 289–301. Retrieved February 8, 2025 from https://www.usenix.org/conference/soups2019/presentation/mecke-confidence