59 citations · 75 across the 5 of their papers we have counts for
5 papers
52 Weeks Later: Attitudes Towards COVID-19 Apps for Different Purposes Over Time
Marvin Kowalewski, Christine Utz, Martin Degeling +6
The COVID-19 pandemic has prompted countries around the world to introduce smartphone apps to support disease control efforts. Their purposes range from digital contact tracing to…
Freaky Leaky SMS: Extracting User Locations by Analyzing SMS Timings
Evangelos Bitsikas, Theodor Schnitzler, Christina Pöpper +1
Short Message Service (SMS) remains one of the most popular communication channels since its introduction in 2G cellular networks. In this paper, we demonstrate that merely receivi…
Hope of Delivery: Extracting User Locations From Mobile Instant Messengers
Theodor Schnitzler, Katharina Kohls, Evangelos Bitsikas +1
Mobile instant messengers such as WhatsApp use delivery status notifications in order to inform users if a sent message has successfully reached its destination. This is useful and…
Proof-of-Vax: Studying User Preferences and Perception of Covid Vaccination Certificates
Marvin Kowalewski, Franziska Herbert, Theodor Schnitzler +1
Digital tools play an important role in fighting the current global COVID-19 pandemic. We conducted a representative online study in Germany on a sample of 599 participants to eval…
Apps Against the Spread: Privacy Implications and User Acceptance of COVID-19-Related Smartphone Apps on Three Continents
Christine Utz, Steffen Becker, Theodor Schnitzler +5
The COVID-19 pandemic has fueled the development of smartphone applications to assist disease management. Many "corona apps" require widespread adoption to be effective, which has…