Analysis of Built-in Mobile Phone Sensors for Supporting Interactions with the Real World. - Karin Leichtenstern; Alexander De Luca; Enrico Rukzio (PERMID, 2005)

Visualization of uncertainty in context aware mobile applications. - Enrico Rukzio; John Hamard; Chie Noda; Alexander De Luca (Mobile HCI, 2006)

Eye-gaze interaction for mobile phones. - Heiko Drewes; Alexander De Luca; Albrecht Schmidt 001 (Mobility Conference, 2007)

The privacy badge: a privacy-awareness user interface for small devices. - Martin Gisch; Alexander De Luca; Markus Blanchebarbe (Mobility Conference, 2007)

Evaluation of eye-gaze interaction methods for security enhanced PIN-entry. - Alexander De Luca; Roman Weiss; Heiko Drewes (OZCHI, 2007)

PassShape: stroke based shape passwords. - Alexander De Luca; Roman Weiss; Heinrich Hussmann (OZCHI, 2007)

CityFlocks: designing social navigation for urban mobile information systems. - Mark Bilandzic; Marcus Foth; Alexander De Luca (Conference on Designing Interactive Systems, 2008)

Eyepass - eye-stroke authentication for public terminals. - Alexander De Luca; Roman Weiss; Heinrich Hußmann; Xueli An (CHI Extended Abstracts, 2008)

Menu Structuring for Mobile Devices. - Katrin Sauerwein; Nathalie Prevost; Alexander De Luca (GI Jahrestagung (1), 2008)

Spybuster - a community-based privacy tagging platform. - Johannes Kiemer; Till Ballendat; Tim Langer; Wenqi Zhang; Alexander De Luca (Mobile HCI, 2008)

Laermometer: a mobile noise mapping application. - Mark Bilandzic; Michael Banholzer; Deyan Peev; Vesko Georgiev; Florence T. Balagtas-Fernandez; Alexander De Luca (NordiCHI, 2008)

A privacy-respectful input method for public terminals. - Alexander De Luca; Bernhard Frauendienst (NordiCHI, 2008)

PassShapes: utilizing stroke based authentication to increase password memorability. - Roman Weiss; Alexander De Luca (NordiCHI, 2008)

Automatic form filling on mobile devices. - Enrico Rukzio; Chie Noda; Alexander De Luca; John Hamard; Fatih Coskun (Pervasive Mob. Comput., 2008)

Vibrapass: secure authentication based on shared lies. - Alexander De Luca; Emanuel von Zezschwitz; Heinrich Hußmann (CHI, 2009)

Please touch the exhibits!: using NFC-based interaction for exploring a museum. - Anna Magdalena Blöckner; Svetlana Danti; Jennifer Forrai; Gregor Broll; Alexander De Luca (Mobile HCI, 2009)

pieTouch: a direct touch gesture interface for interacting with in-vehicle information systems. - Ronald Ecker; Verena Broy; Andreas Butz; Alexander De Luca (Mobile HCI, 2009)

SeCuUI: autocomplete your terminal input. - Max-Emanuel Maurer; Alexander De Luca (Mobile HCI, 2009)

A context-sensitive security model for privacy protection on mobile phones. - Julian Seifert; Alexander De Luca; Bettina Conradi (Mobile HCI, 2009)

My phone is my keypad: privacy-enhanced PIN-entry on public terminals. - Alexander De Luca; Bernhard Frauendienst; Sebastian Boring; Heinrich Hussmann (OZCHI, 2009)

Look into my eyes!: can you guess my password? - Alexander De Luca; Martin Denzel; Heinrich Hussmann (SOUPS, 2009)

On the design of a "moody" keyboard. - Alexander De Luca; Bernhard Frauendienst; Max-Emanuel Maurer; Doris Hausen (Conference on Designing Interactive Systems, 2010)

ColorPIN: securing PIN entry through indirect input. - Alexander De Luca; Katja Hertzschuch; Heinrich Hussmann (CHI, 2010)

Mobile or desktop websites?: website usage on multitouch devices. - Max-Emanuel Maurer; Doris Hausen; Alexander De Luca; Heinrich Hussmann (NordiCHI, 2010)

TreasurePhone: Context-Sensitive User Data Protection on Mobile Phones. - Julian Seifert; Alexander De Luca; Bettina Conradi; Heinrich Hussmann (Pervasive, 2010)

Towards understanding ATM security: a field study of real world ATM use. - Alexander De Luca; Marc Langheinrich; Heinrich Hussmann (SOUPS, 2010)

Does MoodyBoard make internet use more secure?: evaluating an ambient security visualization tool. - Alexander De Luca; Bernhard Frauendienst; Max-Emanuel Maurer; Julian Seifert; Doris Hausen; Niels Kammerer; Heinrich Hussmann (CHI, 2011)

Data type based security alert dialogs. - Max-Emanuel Maurer; Alexander De Luca; Heinrich Hussmann (CHI Extended Abstracts, 2011)

Shining Chrome: Using Web Browser Personas to Enhance SSL Certificate Visualization. - Max-Emanuel Maurer; Alexander De Luca; Tobias Stockinger (INTERACT (4), 2011)

Using data type based security alert dialogs to raise online security awareness. - Max-Emanuel Maurer; Alexander De Luca; Sylvia Kempe (SOUPS, 2011)

Designing Usable and Secure Authentication Mechanisms for Public Spaces. - Alexander De Luca (2011)

Touch me once and i know it's you!: implicit authentication based on touch screen patterns. - Alexander De Luca; Alina Hang; Frederik Brudy; Christian Lindner; Heinrich Hussmann (CHI, 2012)

Don't queue up!: user attitudes towards mobile interactions with public terminals. - Julian Seifert; Alexander De Luca; Enrico Rukzio (MUM, 2012)

Too much information!: user attitudes towards smartphone sharing. - Alina Hang; Emanuel von Zezschwitz; Alexander De Luca; Heinrich Hussmann (NordiCHI, 2012)

Designing interactive secure system: chi 2013 special interest group. - Shamal Faily; Lizzie Coles-Kemp; Paul Dunphy; Mike Just; Yoko Akama; Alexander De Luca (CHI Extended Abstracts, 2013)

Back-of-device authentication on smartphones. - Alexander De Luca; Emanuel von Zezschwitz; Ngo Dieu Huong Nguyen; Max-Emanuel Maurer; Elisa Rubegni; Marcello Paolo Scipioni; Marc Langheinrich (CHI, 2013)

Using fake cursors to secure on-screen password entry. - Alexander De Luca; Emanuel von Zezschwitz; Laurent Pichler; Heinrich Hussmann (CHI, 2013)

Travel Routes or Geography Facts? An Evaluation of Voice Authentication User Interfaces. - Alina Hang; Alexander De Luca; Katharina Frison; Emanuel von Zezschwitz; Massimo Tedesco; Marcel Kockmann; Heinrich Hussmann (INTERACT (3), 2013)

Investigating Pointing Tasks across Angularly Coupled Display Areas. - Fabian Hennecke; Alexander De Luca; Ngo Dieu Huong Nguyen; Sebastian Boring; Andreas Butz (INTERACT (1), 2013)

Long-Term Experiences with an Iterative Design of a QR-Code-Based Payment System for Beverages. - Max-Emanuel Maurer; Alexander De Luca; Alina Hang; Doris Hausen; Fabian Hennecke; Sebastian Loehmann; Henri Palleis; Hendrik Richter 002; Simon Stusak; Aurélien Tabard; Sarah Tausch; Emanuel von Zezschwitz; et al. (INTERACT (4), 2013)

Survival of the Shortest: A Retrospective Analysis of Influencing Factors on Password Composition. - Emanuel von Zezschwitz; Alexander De Luca; Heinrich Hussmann (INTERACT (3), 2013)

Making graphic-based authentication secure against smudge attacks. - Emanuel von Zezschwitz; Anton Koslow; Alexander De Luca; Heinrich Hussmann (IUI, 2013)

Oh app, where art thou?: on app launching habits of smartphone users. - Alina Hang; Alexander De Luca; Jonas Hartmann; Heinrich Hussmann (Mobile HCI, 2013)

Patterns in the wild: a field study of the usability of pattern and pin-based authentication on mobile devices. - Emanuel von Zezschwitz; Paul Dunphy; Alexander De Luca (Mobile HCI, 2013)

Using icon arrangement for fallback authentication on smartphones. - Alina Hang; Alexander De Luca; Heinrich Hussmann (CHI Extended Abstracts, 2014)

Now you see me, now you don't: protecting smartphone authentication from shoulder surfers. - Alexander De Luca; Marian Harbach; Emanuel von Zezschwitz; Max-Emanuel Maurer; Bernhard Ewald Slawik; Heinrich Hussmann; Matthew Smith 001 (CHI, 2014)

Workshop on inconspicuous interaction. - Diogo Marques 001; Luís Carriço; Tiago João Guerreiro 001; Alexander De Luca; Pattie Maes; Ildar Muslukhov; Ian Oakley; Emanuel von Zezschwitz (CHI Extended Abstracts, 2014)

Honey, I shrunk the keys: influences of mobile devices on password composition and authentication performance. - Emanuel von Zezschwitz; Alexander De Luca; Heinrich Hussmann (NordiCHI, 2014)

It's a Hard Lock Life: A Field Study of Smartphone (Un)Locking Behavior and Risk Perception. - Marian Harbach; Emanuel von Zezschwitz; Andreas Fichtner; Alexander De Luca; Matthew Smith 001 (SOUPS, 2014)

Improving Accuracy, Applicability and Usability of Keystroke Biometrics on Mobile Touchscreen Devices. - Daniel Buschek; Alexander De Luca; Florian Alt (CHI, 2015)

I Know What You Did Last Week! Do You?: Dynamic Security Questions for Fallback Authentication on Smartphones. - Alina Hang; Alexander De Luca; Heinrich Hussmann (CHI, 2015)

I Feel Like I'm Taking Selfies All Day!: Towards Understanding Biometric Authentication on Smartphones. - Alexander De Luca; Alina Hang; Emanuel von Zezschwitz; Heinrich Hussmann (CHI, 2015)

Glass Unlock: Enhancing Security of Smartphone Unlocking through Leveraging a Private Near-eye Display. - Christian Winkler 001; Jan Gugenheimer; Alexander De Luca; Gabriel Haas 001; Philipp Speidel; David Dobbelstein; Enrico Rukzio (CHI, 2015)

SwiPIN: Fast and Secure PIN-Entry on Smartphones. - Emanuel von Zezschwitz; Alexander De Luca; Bruno Brunkow; Heinrich Hussmann (CHI, 2015)

Easy to Draw, but Hard to Trace?: On the Observability of Grid-based (Un)lock Patterns. - Emanuel von Zezschwitz; Alexander De Luca; Philipp Janssen; Heinrich Hussmann (CHI, 2015)

Automatic Privacy Classification of Personal Photos. - Daniel Buschek; Moritz Bader; Emanuel von Zezschwitz; Alexander De Luca (INTERACT (2), 2015)

There is more to Typing than Speed: Expressive Mobile Touch Keyboards via Dynamic Font Personalisation. - Daniel Buschek; Alexander De Luca; Florian Alt (MobileHCI, 2015)

ColorSnakes: Using Colored Decoys to Secure Authentication in Sensitive Contexts. - Jan Gugenheimer; Alexander De Luca; Hayato Hess; Stefan Karg; Dennis Wolf 002; Enrico Rukzio (MobileHCI, 2015)

Locked Your Phone? Buy a New One? From Tales of Fallback Authentication on Smartphones to Actual Concepts. - Alina Hang; Alexander De Luca; Emanuel von Zezschwitz; Manuel Demmler; Heinrich Hussmann (MobileHCI, 2015)

Where Have You Been? Using Location-Based Security Questions for Fallback Authentication. - Alina Hang; Alexander De Luca; Matthew Smith 001; Michael Richter; Heinrich Hussmann (SOUPS, 2015)

Is Secure and Usable Smartphone Authentication Asking Too Much? - Alexander De Luca; Janne Lindqvist (Computer, 2015)

SnapApp: Reducing Authentication Overhead with a Time-Constrained Fast Unlock Option. - Daniel Buschek; Fabian Hartmann; Emanuel von Zezschwitz; Alexander De Luca; Florian Alt (CHI, 2016)

Evaluating the Influence of Targets and Hand Postures on Touch-based Behavioural Biometrics. - Daniel Buschek; Alexander De Luca; Florian Alt (CHI, 2016)

The Anatomy of Smartphone Unlocking: A Field Study of Android Lock Screens. - Marian Harbach; Alexander De Luca; Serge Egelman (CHI, 2016)

Keep on Lockin' in the Free World: A Multi-National Comparison of Smartphone Locking. - Marian Harbach; Alexander De Luca; Nathan Malkin; Serge Egelman (CHI, 2016)

You Can't Watch This!: Privacy-Respectful Photo Browsing on Smartphones. - Emanuel von Zezschwitz; Sigrid Ebbinghaus; Heinrich Hussmann; Alexander De Luca (CHI, 2016)

On quantifying the effective password space of grid-based unlock gestures. - Emanuel von Zezschwitz; Malin Eiband; Daniel Buschek; Sascha Oberhuber; Alexander De Luca; Florian Alt; Heinrich Hussmann (MUM, 2016)

Expert and Non-Expert Attitudes towards (Secure) Instant Messaging. - Alexander De Luca; Sauvik Das; Martin Ortlieb; Iulia Ion; Ben Laurie (SOUPS, 2016)

Privacy Wedges: Area-Based Audience Selection for Social Network Posts. - Frederic Raber; Alexander De Luca; Moritz Graus (WPI@SOUPS, 2016)

Usable privacy and security. - Alexander De Luca; Emanuel von Zezschwitz (it Inf. Technol., 2016)

The Anatomy Of Smartphone Unlocking: Why and How Android Users Around the World Lock their Phones. - Nathan Malkin; Marian Harbach; Alexander De Luca; Serge Egelman (GetMobile Mob. Comput. Commun., 2016)

"If I press delete, it's gone" - User Understanding of Online Data Deletion and Expiration. - Ambar Murillo; Andreas Kramm; Sebastian Schnorf; Alexander De Luca (SOUPS @ USENIX Security Symposium, 2018)

Towards Understanding the Link Between Age and Smartphone Authentication. - Lina Qiu; Alexander De Luca; Ildar Muslukhov; Konstantin Beznosov (CHI, 2019)

CHI 2019. - Frederik Brudy; Alexander De Luca; Jennifer Marlow; Manya Sleeper; Susanne Kirchner-Adelhardt; Sean Munson; Michael Nebeling; Sarah Clinch (IEEE Pervasive Comput., 2019)

"I do (not) need that Feature!" - Understanding Users' Awareness and Control of Privacy Permissions on Android Smartphones. - Sarah Prange; Pascal Knierim; Gabriel Knoll; Felix Dietz; Alexander De Luca; Florian Alt (SOUPS @ USENIX Security Symposium, 2024)