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

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

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