2026
- Alia Saad, Verena Winterhalter, Marvin Strauss and Stefan Schneegass: "I Feel More Worried About My Privacy" Public Perceptions of Biometric Traces in Everyday Interactions. In: Nuria Oliver, David A. Shamma, Heloisa Candello, Pablo César, Pedro Lopes, Valentino Artizzu, Fiona Draxler, Gustavo López, Anke V. Reinschluessel, Xin Tong and Phoebe O. Toups Dugas (eds.): Proceedings of the Extended Abstracts of the 2026 CHI Conference on Human Factors in Computing Systems, CHI EA 2026, Barcelona, Spain, April 13-17, 2026 , ACM , 2026 , 11:1-11:6. [DOI]
2025
- Jonathan Liebers, Felix Bernardi, Alia Saad, Lukas Mecke, Uwe Gruenefeld, Florian Alt and Stefan Schneegass: Predicting Personality Traits from Hand-Tracking and Typing Behavior in Extended Reality under the Presence and Absence of Haptic Feedback. In: Naomi Yamashita, Vanessa Evers, Koji Yatani and Sharon Xianghua Ding (eds.): Proceedings of the Extended Abstracts of the CHI Conference on Human Factors in Computing Systems, CHI EA 2025, Yokohama, Japan, 26 April 2025- 1 May 2025 , ACM , 2025 , 442:1-442:8. [DOI]
- Alia Saad, Jonathan Liebers, Constantin Koczian, Nick Wittig, Roman Heger, Marvin Strauss, Niklas Pfützenreuter, David Goedicke, Uwe Gruenefeld, Stefan Schneegass and Donald Degraen: Investigating Gait Imitation in VR: Impact of Visual Feedback and Avatar Design. In: Salvatore Sorce, Passant Elagroudy and Mohamed Khamis (eds.): Proceedings of the 24th International Conference on Mobile and Ubiquitous Multimedia, MUM 2025, EnnaItaly, December 1-4, 2025 , ACM , 2025 , 301-309. [DOI]
2024
- Max Pascher, Alia Saad, Jonathan Liebers, Roman Heger, Jens Gerken, Stefan Schneegass and Uwe Gruenefeld: Hands-On Robotics: Enabling Communication Through Direct Gesture Control. In: Dan Grollman, Elizabeth Broadbent, Wendy Ju, Harold Soh and Tom Williams (eds.): Companion of the 2024 ACM/IEEE International Conference on Human-Robot Interaction, HRI 2024, Boulder, CO, USA, March 11-15, 2024 , ACM , 2024 , 822-827. [DOI]
- Max Pascher, Alia Saad, Jonathan Liebers, Roman Heger, Jens Gerken, Stefan Schneegass and Uwe Gruenefeld: Hands-On Robotics: Enabling Communication Through Direct Gesture Control.CoRR, Volume abs/2401.09077, 2024. [DOI]
- Lukas Mecke, Alia Saad, Sarah Prange, Uwe Gruenefeld, Stefan Schneegass and Florian Alt: Do They Understand What They Are Using? - Assessing Perception and Usage of Biometrics.CoRR, Volume abs/2410.12661, 2024. [DOI]
2023
- Alia Saad, Kian Izadi, Anam Ahmad Khan, Pascal Knierim, Stefan Schneegass, Florian Alt and Yomna Abdelrahman: HotFoot: Foot-Based User Identification Using Thermal Imaging. In: Albrecht Schmidt, Kaisa Väänänen, Tesh Goyal, Per Ola Kristensson, Anicia Peters, Stefanie Mueller, Julie R. Williamson and Max L. Wilson (eds.): Proceedings of the 2023 CHI Conference on Human Factors in Computing Systems, CHI 2023, Hamburg, Germany, April 23-28, 2023 , ACM , 2023 , 262:1-262:13. [DOI]
- Alia Saad, Max Pascher, Khaled Kassem, Roman Heger, Jonathan Liebers, Stefan Schneegass and Uwe Gruenefeld: Hand-in-Hand: Investigating Mechanical Tracking for User Identification in Cobot Interaction. In: Florian Michahelles, Pascal Knierim and Jonna Häkkilä (eds.): Proceedings of the 22nd International Conference on Mobile and Ubiquitous Multimedia, MUM 2023, Vienna, Austria, December 3-6, 2023 , ACM , 2023 , 583-591. [DOI]
2022
- Stefan Schneegass, Alia Saad, Roman Heger, Sarah Delgado Rodriguez, Romina Poguntke and Florian Alt: An Investigation of Shoulder Surfing Attacks on Touch-Based Unlock Events.Proc. ACM Hum. Comput. Interact., Volume 6, Number MHCI, 2022, 1-14. [DOI]
- Mihai Bâce, Alia Saad, Mohamed Khamis, Stefan Schneegass and Andreas Bulling: PrivacyScout: Assessing Vulnerability to Shoulder Surfing on Mobile Devices.Proc. Priv. Enhancing Technol., Volume 2022, Number 3, 2022, 650-669. [DOI]
- Yasmeen Abdrabou, Sheikh Radiah Rivu, Tarek Ammar, Jonathan Liebers, Alia Saad, Carina Liebers, Uwe Gruenefeld, Pascal Knierim, Mohamed Khamis, Ville Mäkelä, Stefan Schneegass and Florian Alt: Understanding Shoulder Surfer Behavior and Attack Patterns Using Virtual Reality. In: Paolo Bottoni and Emanuele Panizzi (eds.): AVI 2022: International Conference on Advanced Visual Interfaces, Frascati, Rome, Italy, June 6 - 10, 2022 , ACM , 2022 , 15:1-15:9. [DOI]
- Alia Saad, Uwe Gruenefeld, Lukas Mecke, Marion Koelle, Florian Alt and Stefan Schneegass: Mask removal isn't always convenient in public! - The Impact of the Covid-19 Pandemic on Device Usage and User Authentication. In: Simone D. J. Barbosa, Cliff Lampe, Caroline Appert and David A. Shamma (eds.): CHI '22: CHI Conference on Human Factors in Computing Systems, New Orleans, LA, USA, 29 April 2022 - 5 May 2022, Extended Abstracts , ACM , 2022 , 218:1-218:7. [DOI]
- Alia Saad, Nick Wittig, Uwe Gruenefeld and Stefan Schneegass: A Systematic Analysis of External Factors Affecting Gait Identification. In: IEEE International Joint Conference on Biometrics, IJCB 2022, Abu Dhabi, United Arab Emirates, October 10-13, 2022 , IEEE , 2022 , 1-9. [DOI]
- Yasmeen Abdrabou, Radiah Rivu, Tarek Ammar, Jonathan Liebers, Alia Saad, Carina Liebers, Uwe Gruenefeld, Pascal Knierim, Mohamed Khamis, Ville Mäkelä, Stefan Schneegass and Florian Alt: Understanding Shoulder Surfer Behavior Using Virtual Reality. In: 2022 IEEE Conference on Virtual Reality and 3D User Interfaces Abstracts and Workshops, VR Workshops, Christchurch, New Zealand, March 12-16, 2022 , IEEE , 2022 , 576-577. [DOI]
2021
- Jonathan Liebers, Mark Abdelaziz, Lukas Mecke, Alia Saad, Jonas Auda, Uwe Gruenefeld, Florian Alt and Stefan Schneegass: Understanding User Identification in Virtual Reality Through Behavioral Biometrics and the Effect of Body Normalization. In: Yoshifumi Kitamura, Aaron Quigley, Katherine Isbister, Takeo Igarashi, Pernille Bjørn and Steven Mark Drucker (eds.): CHI '21: CHI Conference on Human Factors in Computing Systems, Virtual Event / Yokohama, Japan, May 8-13, 2021 , ACM , 2021 , 517:1-517:11. [DOI]
- Alia Saad, Jonathan Liebers, Uwe Gruenefeld, Florian Alt and Stefan Schneegass: Understanding Bystanders' Tendency to Shoulder Surf Smartphones Using 360-degree Videos in Virtual Reality. In: Jessica R. Cauchard and Marcos Serrano (eds.): MobileHCI '21: 23rd International Conference on Mobile Human-Computer Interaction, Toulouse & Virtual Event, France, 27 September 2021 - 1 October 2021 , ACM , 2021 , 35:1-35:8. [DOI]
2020
- Alia Saad, Dina Hisham Elkafrawy, Slim Abdennadher and Stefan Schneegass: Are They Actually Looking? Identifying Smartphones Shoulder Surfing Through Gaze Estimation. In: Andreas Bulling, Anke Huckauf, Eakta Jain, Ralph Radach and Daniel Weiskopf (eds.): ETRA '20 Adjunct: 2020 Symposium on Eye Tracking Research and Applications, Stuttgart, Germany, June 2-5, 2020, Adjunct Volume , ACM , 2020 , 42:1-42:3. [DOI]
2018
- Alia Saad, Michael Chukwu and Stefan Schneegass: Communicating Shoulder Surfing Attacks to Users. In: Slim Abdennadher and Florian Alt (eds.): Proceedings of the 17th International Conference on Mobile and Ubiquitous Multimedia, MUM 2018, Cairo, Egypt, November 25-28, 2018 , ACM , 2018 , 147-152. [DOI]
